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  • Effect of Double-Nozzle Jet on Mechanical Properties

    CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract: Earlier investigations have demonstrated that air interlacing improves the mechanical properties of Self-Twist (ST) yarns. In following of previous efforts, this paper discusses improving of mechanical properties of ST yarn by using double-nozzle jet. In the present work, at first, a Murata jet …

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  • (PDF) Effect of Double-Nozzle Jet on Mechanical

    In following of previous efforts, this paper discusses improving of mechanical properties of ST yarn by using double-nozzle jet. In the present work, at first, a Murata jet was attached to Repco ST yarn machine which the air pressure and distance of double-nozzle jet from twisting rollers were varied.

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  • Effect of Double-Nozzle Jet on Mechanical Properties

    Download Citation | Effect of Double-Nozzle Jet on Mechanical Properties of Interlaced Self-Twist Yarn | Earlier investigations have demonstrated that air interlacing improves the mechanical …

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  • Theoretical Analysis of the Mechanical Effects of

    2020-7-28 · The mechanical characteristics and stress state caused by water jet loading are influenced by many factors that have restricted studies on the jet mechanism. Using the basic theory of elasticity and fluid dynamics, the mechanical effects of water jet loading are analyzed. Based on the simplified jet distribution pressure, the elastic …

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  • Effect of the structure of backward orifices on the jet ...

    2020-9-25 · Self-propelled nozzle is a critical component of the radial jet drilling technology. Its backward orifice structure has a crucial influence on the propulsive force and the drilling performance. To improve the working performance of the nozzle, the numerical simulation model is built and verified by the experimental results of …

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  • Failure Mechanism and Effect of Nozzle Parameters

    2021-3-31 · Abrasive Water Jet (AWJ) technology has vast application prospects in the assisted drill-blasting of tunnel excavation, with the advantages of fast-breaking speed, low tool wear, less dust, and good mobility. Nevertheless, AWJ technology has some limitations and shortcomings, such as the small effective fracturing range and parameter mismatch, which influence the fracturing effect …

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  • Critical review of off-axial nozzle and coaxial nozzle

    2021-3-26 · The study explored the significant physio-mechanical properties of DMD components and effect of the input variables of the process on the resulting properties is examined. The nozzle design, nozzle diameter, distance between the off-axial nozzle centres, jet targeting position, and nozzle impinging angle relating to the laser beam are …

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  • Effect of process parameters on mechanical

    2020-11-1 · In this paper, the mechanical properties of 3D printed PLA lattice structures were studied using digital image correlation (DIC), and the effect of process parameters on the mechanical properties of the samples was discussed. First, tensile samples and lattice structures of the PLA were prepared by Fused Deposition Modeling (FDM).

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  • An experimental study on the control of plug nozzle

    2021-2-12 · Experimental studies are performed for the near- and far-field characteristics of a plug nozzle jet with the objective to see the effect of truncation of the plug on mean flow characteristics of the jet and its control using vortex generators (VGs). To this end, the plug is truncated at 50%, 40%, and 30% of the axial length from the throat, and mean …

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  • (PDF) Analyzing the effect of nozzle diameter in fused

    2016-9-28 · Nevertheless, the effect of nozzle diameter, which is directly related to product quality and manufacturing costs, has not been …

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  • ELECTROHYDRODYNAMIC JET PRINTING:

    fundamental physics of E-jet printing. A multi-nozzle array (MNA) print head is proposed which has the capability of addressing each nozzle individually or simultaneously print with the whole array. For proof of concept, a four nozzle print head is discussed and has the potential to be increased for batch pattern/image printing.

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  • Methodology for the Evaluation of Double-Layered ...

    2013-4-8 · 3.1. Problem Description and Process Governing Equations. Figure Figure1 1 shows a typical double-layered microcapsule fabrication system with an inner chamber/nozzle filled with a core material and an outer chamber/nozzle filled with a shell material. Sometimes a carrier stream is also introduced to facilitate double-layered …

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  • Demonstrating the style for the Journal of Physics ...

    nozzle ejected drop Figure 3. Schematic diagram of a drop-on-demand print head. Figure 4. High-speed photograph showing a jet of ink emerging from a drop-on-demand nozzle. The jet is typically travelling at 5-10 m s-1. At a later stage the ligament parts: some ink returns to the nozzle and the rest of the tail joins the

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  • Nozzle Correction for Image Quality - Inkjet Insight

    2021-7-28 · Nozzle Correction for Image Quality. By Mark Bale Published: July 28, 2021. Since inkjet printing uses arrays of nozzles to precisely jet ink, the effect of blocked or deviating nozzles is one of the biggest barriers to quality. Learn how different systems approach the problem . . .

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  • Effects of Fuel Nozzle Displacement on Pre-Filming ...

    1999-10-20 · As a result, the spray structure formed by pre-filming airblast atomization may be significantly changed. An experimental investigation is carried out to study the effects of fuel nozzle displacement on the structure of a spray formed by a dual orifice pressure atomizer and a counter-rotating dual swirler.

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  • Nozzle Aspect Ratio Effect on Supersonic Elliptic Jet ...

    2017-7-21 · Nozzle aspect ratio effect on the mixing of Mach 2 elliptic free jet, issuing from convergent–divergent elliptic nozzles of aspect ratios 2, 3, and 4, in the presence of adverse and marginally favorable pressure gradients at the nozzle …

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  • BLASTING TECHNICAL INFORMATION - MC Finishing

    2021-6-28 · The air jet is 1/2 the ID of the nozzle and as the air stream is passed through both, it creates a low pressure which sucks the media from the hopper into the air stream. The media acceleration distance is very short ( from the nozzle to the workpiece-approximately 4 to 14”).

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  • Effect of manufacturing parameters on tensile

    2020-1-1 · Process main parameters that strongly affect the properties of AM 3D printed parts are layer thickness, raster orientation, building orientation and nozzle temperature (Linul et al. (2020); Stoia et al. (2020)). Es-Said et al. (2000) investigated the effect of layer orientation on mechanical properties (tensile strength, modulus of rupture and ...

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  • Analyzing the Effects of Temperature, Nozzle-Bed

    2017-3-8 · However, the effects of nozzle temperature (T), nozzle-bed distance (NBD), and their interactions on strut width (SW) have not been investigated. In the present work, a two-way factorial study with three levels of T and NBD in triplicates was undertaken.

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  • Investigation of the Effect of Polycarbonate Rate on ...

    2021-8-14 · Polybutylene terephthalate (PBT) is a brittle polymer with the disadvantage of low impact toughness, so it is not easy to meet the requirements of both high tensile strength, flexural strength, and high impact strength. In this study, PBT/polycarbonate (PC) blends at different ratios of 95/5, 90/10, 85/15, and 80/20 are investigated. Tensile …

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  • On Switching of a Flip-Flop Jet Nozzle with Double

    This research deals with the oscillation mechanism of a flip-flop jet nozzle with a connecting tube, based on the measurements of pressures and velocities in the connecting tube and inside the nozzle. The measurements are carried out varying: 1) the inside diameter d of the connecting tube; 2) the length L of the connecting tube and 3) the jet velocity VPN from a primary-nozzle …

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  • Nozzle and needle during high viscosity adhesive

    2015-9-9 · When reducing the nozzle diameter, the volume of the glue jet from the piezoelectric impact injection valve reduces. However, increasing the jet velocity is good for high-viscosity spray. When the needle radius is 1.5 mm, the nozzle taper is 60°, and the nozzle orifice with a diameter of 0.1 mm is selected.

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  • Influence of nozzle asymmetry on supersonic jets

    2012-5-17 · 27 January 2016 | The Aeronautical Journal, Vol. 118, No. 1209. Effects of area-ratio on the near-field flow characteristics and deflection of circular inclined coaxial jets. Experimental Thermal and Fluid Science, Vol. 54. Effect of a tab on the aerodynamical development and noise of an underexpanded supersonic jet.

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  • Demonstrating the style for the Journal of Physics ...

    nozzle ejected drop Figure 3. Schematic diagram of a drop-on-demand print head. Figure 4. High-speed photograph showing a jet of ink emerging from a drop-on-demand nozzle. The jet is typically travelling at 5-10 m s-1. At a later stage the ligament parts: some ink returns to the nozzle and the rest of the tail joins the

    Get Price
  • Nozzle Aspect Ratio Effect on Supersonic Elliptic Jet ...

    2017-7-21 · Nozzle aspect ratio effect on the mixing of Mach 2 elliptic free jet, issuing from convergent–divergent elliptic nozzles of aspect ratios 2, 3, and 4, in the presence of adverse and marginally favorable pressure gradients at the nozzle …

    Get Price
  • BLASTING TECHNICAL INFORMATION - MC Finishing

    2021-6-28 · The air jet is 1/2 the ID of the nozzle and as the air stream is passed through both, it creates a low pressure which sucks the media from the hopper into the air stream. The media acceleration distance is very short ( from the nozzle to the workpiece-approximately 4 to 14”).

    Get Price
  • SERVO VALVES - University of Florida

    2006-4-11 · Jet Pipe Design is less sensitive to contamination than the flapper nozzle. Nozzle attached to the armature, directs a stream of fluid (pressure P s) AT TWO RECEIVERS. If nozzle is centered, two receivers are hit by similar fluid streams and resultant pressure at end of spool is equal.

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  • Analyzing the Effects of Temperature, Nozzle-Bed

    2017-3-8 · However, the effects of nozzle temperature (T), nozzle-bed distance (NBD), and their interactions on strut width (SW) have not been investigated. In the present work, a two-way factorial study with three levels of T and NBD in triplicates was undertaken.

    Get Price
  • Theoretical model and characteristics analysis of ...

    To analyze the deflector-jet servo valve’s internal flow characteristics, a theoretical model of the complicated flow distribution in the deflector plate is established based on the offset jet attachment theory. When the deflector plate offsets, jet attachment parameters are attained to figure out the jet’s bending and colliding process. On this basis, an …

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  • Impact Strength of 3D Printed Polyether-ether

    2019-12-10 · Impact Strength of 3D Printed Polyether-ether-ketone (PEEK) Haijun Gong1,*, Xiaodong Xing2, Jan Nel1 1Department of Manufacturing Engineering, Georgia Southern University, Statesboro GA, USA 2College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, China *Corresponding author …

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  • On Switching of a Flip-Flop Jet Nozzle with Double

    This research deals with the oscillation mechanism of a flip-flop jet nozzle with a connecting tube, based on the measurements of pressures and velocities in the connecting tube and inside the nozzle. The measurements are carried out varying: 1) the inside diameter d of the connecting tube; 2) the length L of the connecting tube and 3) the jet velocity VPN from a primary-nozzle …

    Get Price
  • (PDF) A review on nozzle wear in abrasive water jet ...

    Apart from the superior properties of the method, possible damages occur in the water jet nozzle due to processes such as cutting or drilling by applying high pressure. Erosion-corrosion is the ...

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  • Theoretical model and characteristics analysis of ...

    To analyze the deflector-jet servo valve’s internal flow characteristics, a theoretical model of the complicated flow distribution in the deflector plate is established based on the offset jet attachment theory. When the deflector plate offsets, jet attachment parameters are attained to figure out the jet’s bending and colliding process. On this basis, an …

    Get Price
  • BLASTING TECHNICAL INFORMATION - MC Finishing

    2021-6-28 · The air jet is 1/2 the ID of the nozzle and as the air stream is passed through both, it creates a low pressure which sucks the media from the hopper into the air stream. The media acceleration distance is very short ( from the nozzle to the workpiece-approximately 4 to 14”).

    Get Price
  • Numerical simulations on jet impingement cooling

    2017-7-22 · ratio and the effects of h/d and d/D are noteworthy only in the jet impinging region. The local circular jet heat transfer characteristics at fixed jet Reynolds number of Re J = 20,000 have been discussed by Wang et al. [16]. From a thorough literature review it is concluded that cooling with jet impingement has been found good and

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  • Analyzing the Effects of Temperature, Nozzle-Bed

    2017-3-8 · However, the effects of nozzle temperature (T), nozzle-bed distance (NBD), and their interactions on strut width (SW) have not been investigated. In the present work, a two-way factorial study with three levels of T and NBD in triplicates was undertaken.

    Get Price
  • A Computational Fluid Dynamic Analysis of the Effect

    2013-9-16 · Double helix geometry within the nozzle reduced the gas column's stability by generating a fast moving wall of gas around a slow moving center. A pierced internal plate initially increased the gas velocity, however, the nozzle was unable to maintain the velocity and the change produced gas columns of similar stability to a standard nozzle.

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  • FLUID MECHANICS - Ankara Üniversitesi

    2017-8-4 · When the effect of air column on pressure change is considered, the pressure change becomes This difference between the two results (612 and 614 Pa) is less than 1%. Therefore, the effect of air column on pressure change is, indeed, negligible as assumed. In other words, the pressure change of air in the duct is almost entirely

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  • Control of physical properties of carbon nanofibers ...

    2016-4-12 · Carbon nanofibers (CNFs) have attracted considerable attention in recent years because they have superior mechanical strength and excellent electronic properties [1, 2] due to their unique structures, which are low grain boundary, 1D structure with high alignment and high surface area to volume ratio.Therefore, because of their unique properties…

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  • Practical Considerations in Pump Suction

    2012-5-29 · accommodate the pump’s nozzle size; (3) both located less than 5D from the suction nozzle. In contrast, Figure 7 illustrates an elevation (side) view of a double suction pump with two maybe not perfect, but nevertheless better, practices. They are: (1) A long-radius sweeping 90º elbow in the vertical plane, and

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  • Nozzles, turbulence, and jet noise prediction

    Jet noise prediction is notoriously challenging because only subtle features of the flow turbulence radiate sound. The article by Brès et al. (J. Fluid Mech., vol. 851, 2018, pp. 83–124) shows that a well-constructed modelling procedure for the nozzle turbulence can provide unprecedented sub-dB prediction accuracy with modest-scale large-eddy …

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  • Methodology for the Evaluation of Double-Layered ...

    2013-4-8 · 3.1. Problem Description and Process Governing Equations. Figure Figure1 1 shows a typical double-layered microcapsule fabrication system with an inner chamber/nozzle filled with a core material and an outer chamber/nozzle filled with a shell material. Sometimes a carrier stream is also introduced to facilitate double-layered …

    Get Price
  • Nozzle: Applications, General-Flow Analysis, Velocity ...

    2021-8-30 · 3. General-Flow Analysis of a Nozzle: Assumptions: 1. The flow of the fluid is assumed to be one dimensional. 2. The change in area and curvature along the axis of the duct are gradual. 3. Thermodynamic and mechanical properties are uniform across planes normal to the axis of a duct. 4. The flow of the fluid is assumed to be steady flow.

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  • High-Throughput Fabrication of Quality Nanofibers

    2017-7-26 · Based on bubble electrospinning (BE), a modified free surface electrospinning (MFSE) using a cone-shaped air nozzle combined with a solution reservoir made of copper tubes was presented to increase the production of quality nanofibers. In the MFSE process, sodium dodecyl benzene sulfonates (SDBS) were added in the electrospun solution to generate bubbles on a liquid surface. The effects …

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  • Abrasive Jet Machining (AJM) - Process, Parameters ...

    Abrasive jet machining (AJM) is one of the advanced machining processes (mechanical energy based) where a high velocity jet of abrasives is utilized to remove material from work surface by impact erosion. The abrasive jet …

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  • Effects of Dispensing Pressure and Nozzle Diameter

    2008-2-6 · However, the effects of these biomanufacturing processes on cells have not been fully studied. This paper examines the effect of solid freeform fabrication–based direct cell writing process, focusing on dispensing pressure and nozzle size, on the viability and functional behavior of HepG2 cells encapsulated within alginate.

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  • SERVO VALVES - University of Florida

    2006-4-11 · Jet Pipe Design is less sensitive to contamination than the flapper nozzle. Nozzle attached to the armature, directs a stream of fluid (pressure P s) AT TWO RECEIVERS. If nozzle is centered, two receivers are hit by similar fluid streams and resultant pressure at end of spool is equal.

    Get Price
  • ME6604 GAS DYNAMICS AND JET PROPULSION

    2017-12-21 · ME6604 GAS DYNAMICS AND JET PROPULSION 2.A gas (γ=1.3 and R = 0.46 KJ Kg K) at a pressure of 70 Kpa and temperature of 295 K enters a combustion chamber at a velocity of 75 m sec. The …

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  • Effects of living cells on the bioink printability during ...

    2017-6-15 · A. Bioink preparation. Typical bioinks are made from living cells, hydrogel, and/or other additives. As the most common cells of connective tissues in animals, fibroblasts have been widely used in biofabrication research. 8,9,45 Alginate has received more and more attention in tissue engineering applications due to its biocompatibility …

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  • Spray Performance of Alternative Jet Fuel Based

    The effect of nanoparticles weight concentration and ambient pressures on the spray characteristics are investigated in a high pressure-high temperature constant volume spray rig. To this end, a pressure swirl nozzle with an exit diameter of 0.8 mm is used to atomize the fuels.

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  • ELECTROHYDRODYNAMIC JET PRINTING:

    fundamental physics of E-jet printing. A multi-nozzle array (MNA) print head is proposed which has the capability of addressing each nozzle individually or simultaneously print with the whole array. For proof of concept, a four nozzle print head is discussed and has the potential to be increased for batch pattern/image printing.

    Get Price
  • (PDF) Numerical Simulations of a CD Nozzle and the ...

    A numerical method is used to observe the effect of microjets control on wall pressure spreading in sudden expansion two-dimensional planar duct. In order to find the microjet effectiveness 2-jets ...

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  • A double nozzle discharges water (at 10°C) into the ...

    Mechanical Engineering; Mechanical Engineering questions and answers; A double nozzle discharges water (at 10°C) into the atmosphere at a rate of 0.5 m/s. The nozzle is lying in a horizontal plane, and supported by flange bolts to hold the nozzle in place. Neglect viscous and friction effects, and assume the water speed in each jet to be the same.

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  • Powder metallurgy – basics & applications

    2021-8-27 · • Metal powders => Main constituent of a P/M product; final properties of the finished P/M part depends on size, shape, and surface area of powder particles • Single powder production method is not sufficient for all applications Powder production methods: 1. Mechanical methods, 2. Physical methods, 3. Chemical methods 1.

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  • Fabrication and evaluation of controllable deposition ...

    2018-7-12 · During the microelement traveled in multi-nozzle NFES process, the effect of adjacent nozzle on electric field can be neglected due to the effect of nozzle is far overweight the neighboring ones in vertical direction. As a result, the microelement travels in vertical direction of multi-nozzle NFES is consistent with condition of dual-nozzle one.

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  • Characteristics of a supersonic elliptic jet

    The Reynolds numbers of the Mach 2 jet based on nozzle exit diameter are 7.12 × 10 5 and 16.6 × 10 5, respectively, for the minimum and maximum NPRs of 4 and 8 in the present investigation. The design Mach number of the elliptic nozzle is 2. After nozzle fabrication, it is essential to ensure whether the design Mach number is achieved.

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  • Theoretical model and characteristics analysis of ...

    To analyze the deflector-jet servo valve’s internal flow characteristics, a theoretical model of the complicated flow distribution in the deflector plate is established based on the offset jet attachment theory. When the deflector plate offsets, jet attachment parameters are attained to figure out the jet’s bending and colliding process. On this basis, an …

    Get Price
  • Chapter 2

    2019-1-25 · A general objective of hybrid manufacturing is the ‘‘1 + 1 = 3’’effect,meaning that the positive effect of the hybrid process is more than the double of the advantages of the single processes. Hybrid can have several meanings: (1) combination of different active energy sources which act at the same time in the

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  • Effect of porous polycaprolactone beads on bone ...

    2014-11-24 · The warm solution was sprayed through a double nozzle spray with N 2 purging of 2.5 L/min (outer nozzle) into 50% ethanol solution (coagulation solution) to induce the solidification (precipitation) of PCL solution (Figure 1). Feeding rate of the solution was fixed to 60 mL/h (inner nozzle, using syringe pump).

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  • Effect of oxide scale structure on shot-blasting of hot ...

    2020-2-24 · Background The effect of oxide scale composition of hot-rolled strip (Q235) on shot blasting is studied in this article. The properties of the oxide scale on the strip surface change during storage. The shot blasting is an important on-line acid-less descaling technology. The effect of shot blasting is affected by many factors, among …

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  • ACCEPTED MANUSCRIPT OPEN ACCESS ...

    2021-6-21 · using a bioplotter and double-needle system [52]. Fibrin is a protein found in blood and plays an important role in blood clotting [34]. Fibrin can be converted into hydrogel after treating it with thrombin. It offers good biocompatibility and degradation characteristics but possesses weak mechanical properties.

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  • Expanding at Low Pressure Chu Hollenstein, M.

    2005-1-29 · distribution in the jet that can then be used to compute the velocities that are of interest and complete the mapping of the jet. 3. Experimental set-up and model description The plasma jet is generated with a Sulzer Metco F4-VB plasma gun with a 6 mm diameter conical nozzle. It is mounted on a 2-axis displacement system inside a …

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  • Development of a deflector-jet electrohydraulic

    2014-9-19 · The present designs of pilot-operated servovalves are either of a flapper-nozzle type or of a jet-pipe type, and the design aspects and various configurations of servovalves, particularly flapper-nozzle types, are available in many textbooks (Merrit 1967, Watton 1989, McCloy and Martin 1980). However, studies investigating deflector-jet …

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  • World Journal of Engineering

    Effect of the threaded nozzle on delamination and surface texture of PEEK CF30 composite machined by abrasive jet M. Balasubramanian, S. Madhu. The purpose of this study is to bring out the machining characteristics of abrasive jet machining on carbon fibre reinforced thermoplastic composites utilized in aerospace…

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  • Design of a Nozzle for the Production of Metal

    Request PDF | Design of a Nozzle for the Production of Metal Powder via Gas Atomization | In this study, a nozzle has been designed in order to produce metal powder via the method of gas atomization.

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  • Direct Printing and Electrical Characterization of ...

    E-jet printing is a promising fabrication method to achieve high-resolution printing, since the dimension of emitted droplets is significantly reduced and much smaller than nozzle dimension. E-jet printing has been reported for the fabrication of metallic patterns [24,25] and microelectrodes . Compared with commercialized inkjet printing, there ...

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  • Improvement of Heat-Treated Wood Coating

    2021-5-9 · of uses [11–14]. In addition to these advantages, some negative effects occur due to the exposure of the wood material to different temperatures and durations. The negative changes in the mechanical properties of the wood material and the adhesion problems of water-based paints or adhesives to the surface depending on the …

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  • Atomization and Sprays - ResearchGate

    The dispersion of a Jet A-1 kerosene spray generated by plain-jet-in-crossflow injection into the inner annulus of a counter-swirling double …

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  • The Next Frontier in Melt Electrospinning: Taming

    2019-6-11 · 3.Digitization of the electrified molten jet to provide both in-process quality control and a reproducible outcome.[13] 4.Processing a wide range of polymers beyond the “gold standard” poly(ɛ-caprolactone) (PCL).[14] 5.Demonstrating that MEW fiber designs significantly enhances the mechanical properties of soft network …

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  • Hardfacing steel with nanostructured coatings of

    2012-5-11 · Stellite-6 properties and applications. Stellite-6 is a cobalt-based alloy consisting of complex carbides in a matrix. Its chemical composition is shown in Table 1.It is resistant to wear, galling ...

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  • Calculation of Flow through Nozzles and Orifices

    2020-7-25 · Calculations. The relationships for flow rate, pressure loss and head loss through orifices and nozzles are presented in the subsequent section. These relationships all utilise the parameter. β. …

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  • The effect of viscosity and surface tension on inkjet ...

    2019-10-7 · In this study, we investigated the effect of liquid viscosity and surface tension for inkjet printing on porous cellulose sheets. We used five model liquids, representing the operational field of an industrial high speed inkjet printer, as specified by Ohnesorge- and Reynolds number. Drops with 30 pl and 120

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  • Consistency analysis of mechanical properties of ... -

    Mechanical properties including tensile and compression test are to be tested further for different parameters and different types of process. In order to have a good consistency of mechanical properties for tested FDM parts, it is required to take into consideration all influencing factors and try to constrain them as much as possible.

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  • The reduced cohesion of homoconfigurational 1,2

    2019-12-12 · The reduced cohesion of homoconfigurational 1,2-diols B. Hartwig, M. Lange, A. Poblotzki, R. Medel, A. Zehnacker and M. A. Suhm, Phys. Chem. Chem. Phys., 2020, 22, 1122 DOI: 10.1039/C9CP04943F …

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  • Numerical simulation for optimizing the nozzle of

    The nozzles of moist-mix shotcrete are the key parts of forming a steady jet flow field and ensuring the uniform mixing of water and other ingredients. In this paper, for optimizing the nozzle of moist-mix shotcrete, both the internal and external field of a variety of spray nozzles were simulated and analyzed by adopting orthogonal test method with Fluent …

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  • Challenges on optimization of 3D-printed bone

    2020-9-3 · The 3D structures fabricated by FDM usually have good mechanical properties such as those made up of PLA and PCL [165, 166]. Furthermore, the control over porosity and properties can be achieved by adjusting the printing speed. FDM is a well-known 3D printing technique which is easy to use, safe and reliable with a low purchase price.

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  • Rocket Nozzle Thrust and Flow Field Measurements

    2018-3-1 · The nozzle supply line was fitted with an electric heater generating stagnation temperatures in the range of 300 to 450 K. Using a load cell, the thrust produced by the nozzle was measured at each condition. The flow field downstream of the nozzle was surveyed by using a pressure rake and 2-dimensional PIV.

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  • Basics of Space Flight: Rocket Propulsion

    2017-11-26 · The conical nozzle with a 15-degree divergent half-angle has become almost a standard because it is a good compromise on the basis of weight, length, and performance. Since certain performance losses occur in a conical nozzle as a result of the nonaxial component of the exhaust gas velocity, a correction factor, , is applied in the …

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  • Understanding the effect of machine technology and ...

    2 天前 · 7 DRC: Double Re-Crepe (Advanced technology) 8 UCTAD: Un-Creped Through-Air Drying (Advanced technology) 9 LDC: Light Dry-Crepe (Conventional technology) Bulk. Bulk is defined as the volume occupied by a given weight of paper. It is the inverse of apparent density and can be correlated with many other mechanical properties of paper …

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  • Polymers for Melt Electrowriting - Kade - 2021 -

    This EHD effect that prevents Plateau–Rayleigh instabilities allows the nozzle flow rate to be substantially reduced for MEW. [5, 13] Additionally, the comparable high viscosity and low conductivity of melt fluids support the control and stability of the jet.[5, 13-15] This in combination with the controllable collector plate, allows the defined deposition of the jet…

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