Vietnam PDF The effect of nozzle geometry on air-jet texturereliable quality

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  • Effect of Nozzle Geometry on Melt Flow Simulation and ...

    Effect of Nozzle Geometry on Melt Flow Simulation ... changes which may affect to the quality of the printed object. The print quality further ... comes out of a nozzle into ambient air pressure ...

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  • EFFECT OF FIBRE LENGTH AND SUSPENSION

    Placing a swirl nozzle composed of a yarn channel and an air-jet nozzle in a traditional ring spinning frame can reduce yarn hairiness. In this study, two types of swirl nozzles, namely, the circular swirl nozzle and the elliptical swirl nozzle, are designed to optimize the inside structure of the swirl nozzle and improve the yarn quality. Yarn performance is evaluated based on the hairiness ...

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  • Influence of liquid hydrophobicity and nozzle passage ...

    2019-12-19 · the effect of nozzle exit geometry on fibre aligning quality. Details of the nozzles are given in Table 2. The dimensions of the aligned mats were 115mm in width by 900mm in length. Fibre Length Fibre concentration in slurry Nozzle Exit geometry Areal density, gsm 3mm 0.1% Nozzle A 45.58 Nozzle B 63.18 6mm 0.1% Nozzle A 62.01 0.15% 72.22 12mm

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  • Measurement of Air Entrainment During Pouring of an ...

    2015-5-20 · workers focused on the influence of the ink-jet print head geometry, the diameter of the nozzle exit, amplitude and frequency of electrically driven signals, and liquid properties, density, viscosity and surface tension on the drop formation, but little is known about the effect of the wetting condition

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  • Effect of fibre suspension jet stability on alignment ...

    2019-3-5 · air is then driven into a collection bag by the pressure created by the volume of Fig. 2 CAD drawings of the (a) ladle and mold in the stand used for the water and aluminum experiments, and b close-up view of the nozzle geometry, with (c) an illustration of air entrainment via jet plunging into a mold with a sprue.

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  • TURBULENT FLOW OF LIQUID STEEL AND ARGON BUBBLES

    2019-12-11 · Effect of fibre suspension jet stability on alignment quality of discontinuous carbon fibre tapes Z Liu*, TA Turner, KH Wong, SJ Pickering ... A varicose jet and air bubbles (Figure 1– b, c) can also misalign fibres. Therefore, a stable and cylindrical jet (4≤ Weber’s number <8) is required to maintain the ... 2.2 The effects of nozzle ...

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  • Effect of Jet Shape on Flow and Torque Characteristics of ...

    2000-5-31 · nozzle port geometry (port angle and port shape) on the nozzle flow pattern and jet characteristics. All simulations focus on a typical new bifurcated nozzle with square ports and a condition of no clogging or erosion. The effect of clogging, including both initial clogging and severe clogging is investigated elsewhere[12]. II. COMPUTATIONAL MODEL

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  • OPTIMIZATION OF A HIGH-EFFICIENCY JET EJECTOR BY ...

    2015-1-31 · penstock. The shape of jet affects the force and torque on the bucket and runner of turbine. The nozzle of circular cross section is commonly used. In this paper attempt has been made to study the effect of four different jet shapes on the flow and torque characteristics of Pelton turbine runner through numerical simulation.

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  • Experimental, Theoretical, and Computational Investigation ...

    2002-5-31 · Figure 2: Nozzle Flap Geometry Test Nozzle The test nozzle used in this investigation was a sub-scale, non-axisymmetric, two-dimensional convergent-divergent (2D-CD) nozzle with a nominal throat area A t=4.317 in 2, an expansion ratio A e/A t=1.797, and a constant width of 3.990 inches. Based on 1D Theory, the nozzle has a design NPR of 8.78 ...

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  • EXPERIMENTAL I A -K G CONTINUOUS H -D G

    2014-6-18 · iv impinging jet subjected to a wide range of gas wiping parameters which include the main jet Reynolds number (Rem), the auxiliary jet Reynolds number (Re a), and the plate-to- nozzle ratio (z/d).A comparison between the measured results obtained for the two

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  • Reduced span spray: Part 3: Design of a narrow span nozzle

    2016-6-28 · The splash plate nozzle geometry can be simplified as a pipe ending perpendicularly on a horizontal disk. The flow will create a liquid sheet on the disk then at the exit of the disk a liquid sheet or multiple jets will be formed. Three main regions of the nozzle can be distinguished: the nozzle pipe end, the disk, the disk border.

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  • Ansys Nozzle Jet - cdn.app.jackwills.com

    2021-8-4 · Ansys Nozzle Jet computational study of effects of drop size distribution in fire suppression systems g tanner w kalata k ... engineering fields so as to ensure the quality of cfd simulations, the jet noise broadband source model for ... waterjet cutting head nozzle wall results show that nozzle length has an effect on the mixing of water air and

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  • Aeroacoustic Characteristics of Model Jet Test Facility ...

    2020-8-6 · Aeroacoustic Characteristics of Model Jet Test Facility Flow Conditioners Kevin W. Kinzie*, Brenda S. Henderson**, and Harry H. Haskin*** NASA Langley Research Center, Hampton , VA 23681 An experimental investigation of flow conditioning devices used to suppress internal

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  • & Aeros Journal of Aeronautics & Aerospace El-Zahaby et al ...

    2019-2-15 · mesh quality of minimum orthogonal quality equal to 8.04913e-01 and maximum aspect ratio equal to 2.50071e+01(according to Fluent mesh quality indicator [20]. While the cells close to primary nozzle, walls and mixing section is dense enough to solve the complex flow phenomenon at each. Secondly, in order to predict better the internal flow status,

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  • Effect of Process Parameters and Shot Peening on the ...

    2019-4-24 · Experiments were also carried out to investigate the effect of different nozzle sizes on the enhancement of critical flux and membrane fouling control. Nozzles with a diameter ( D n ) of 0 mm, 2.2 mm, 3.5 mm, 6.0 mm, and 10.0 mm were employed to produce bubbles.

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  • A review on nozzle wear in abrasive water jet machining ...

    2019-10-17 · Effect of Process Parameters and Shot Peening on the Tensile Strength and Deflection of ... The sample geometry is provided in Fig. 4. ... peened with glass beads from 10 to 25 passes in increments of 5 passes at a constant maximum air pressure of 85 psi with the gun nozzle …

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  • Reduced span spray: Part 3: Design of a narrow span nozzle

    2016-6-28 · The splash plate nozzle geometry can be simplified as a pipe ending perpendicularly on a horizontal disk. The flow will create a liquid sheet on the disk then at the exit of the disk a liquid sheet or multiple jets will be formed. Three main regions of the nozzle can be distinguished: the nozzle pipe end, the disk, the disk border.

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  • The effect of nozzle-exit-channel shape on resultant fiber ...

    2017-1-16 · The effect of nozzle-exit-channel shape on the resultant fiber diameter was investigated by machining several nozzles with different exit-channel shapes. The cross-sectional area for C1, Sqr, Tri, and R1 nozzles was 38 000 ± 500 μm 2. Figure 4 shows the average diameters of produced fibers using C1, Sqr, Tri, and R1 nozzles at 100 °C to 140 ...

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  • Shi, Z., Chen, J., You, R., Chen, C., and Chen, Q. 2016 ...

    2016-6-24 · 1 Modeling of Gasper-Induced Jet Flow and Its Impact on Cabin Air Quality Zhu Shi1, Jun Chen1, Ruoyu You1, Chun Chen2 and Qingyan Chen1,3 1 School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA 2 Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, N.T. 999077, Hong Kong SAR, China

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  • A NOVEL CFD APPROACH FOR MODELLING THE HIGH

    2016-11-8 · depending on the operating point and the nozzle geometry, URANS based three-dimensional CFD simulation is an appropriate mean to explore optimal properties of the mixture forma-tion. The numerical simulation of a supersonic gas jet emerging from a high-pressure reservoir through a nozzle is a challenging task.

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  • Effects of Clogging, Argon Injection and Casting ...

    2003-7-18 · Air aspiration through cracks and joints into the nozzle leads to reoxidation, which is an important cause of inclusions and clogging [1, 2]. Air aspiration is more likely if the pressure inside the nozzle drops below atmospheric pressure, creating a partial vacuum. While regulating the liquid steel flow, the slide-gate creates a local flow

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  • Cold spray coating: review of material systems and future ...

    2014-7-4 · REVIEW Cold spray coating: review of material systems and future perspectives A. Moridi1,2, S. M. Hassani-Gangaraj1,2, M. Guagliano*1 and M. Dao2 Cold gas dynamic spray or simply cold spray (CS) is a process in which solid powders are

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  • Effect of Injector Geometry Variables Upon the Spray ...

    2015-4-2 · Shaw, SG, & Jasuja, AK. 'Effect of Injector Geometry Variables Upon the Spray Performance of a Plain-Jet Airblast Atomizer.' Proceedings of the ASME 1985 Beijing International Gas Turbine Symposium and Exposition. Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels. Beijing, People’s Republic of China. September 1–7, 1985.

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  • (PDF) Modelling and Simulation of Supersonic Nozzle using ...

    KM Pandey, SK yadav “CFD analysis of a rocket nozzle with four inlets at Mach 2.1”, international journal of chemical engineering and application (IJCEA),Vol.1, 4dec 2010. [3] Srikrishna C. Srinivasan “CFD modelling and analyzing of an air-jet facility …

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  • aerodynamics - Why are adjustable area jet engine nozzles ...

    2014-11-14 · It seems that only jet engines with afterburners use adjustable area nozzles (this means adjusting the area of the nozzle but not necessarily the direction).This includes most fighter jets, as well as bombers like the B-1B and Tu-160. Outside of the military or afterburning engines, they don't seem to be used, even for smaller engines.

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  • Frontiers | CFD Optimization of the Pre-Chamber Geometry ...

    2021-1-25 · In the present paper, an efficient optimization method based on Bayesian updating strategy is developed for the design of a spark-ignition engine equipped with pre-chamber. 3D computational fluid dynamics (CFD) simulation coupled with strategies including design of experiment, genetic algorithm, and machine learning methods is used to optimize the pre …

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  • ANALYSIS OF DIESEL SPRAY CHARACTERISTIC USING

    2015-3-3 · The aim of this project was to study the effect of nozzle geometry against the fuel spray behavior. Comparisons were made between different nozzle geometries and different injection pressures. Differences were observed between VCO (Valve Covers Orifice) and Sac nozzles. The physical properties of diesel such as density,

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  • Shi, Z., Chen, J., You, R., Chen, C., and Chen, Q. 2016 ...

    2016-6-24 · 1 Modeling of Gasper-Induced Jet Flow and Its Impact on Cabin Air Quality Zhu Shi1, Jun Chen1, Ruoyu You1, Chun Chen2 and Qingyan Chen1,3 1 School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907, USA 2 Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, N.T. 999077, Hong Kong SAR, China

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  • Fluid Flow in the Mold - University of Illinois Urbana ...

    2003-5-19 · Fig. 14.3 helps to improve surface quality by substantially lowering meniscus turbulence, although it has little effect on air entrainment. 14.2.2 Stopper Rod Flow Control To avoid reoxidation and produce higher quality steel, a protective ceramic nozzle can be used to shroud the flow of steel into the mold.

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  • One-dimensional Model of an Optimal Ejector and Parametric ...

    2014-4-15 · One-dimensional Model of an Optimal Ejector and Parametric Study of Ejector Efficiency Ronan K. McGoverna, Kartik V. Bulusub, Mohammed A. Antarc and John H. Lienhard Vd a Massachusetts Institute of Technology, Cambridge, MA, U.S.A., [email protected] b The George Washington University, Washington D.C., U.S.A., [email protected] c King Fahd University …

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  • Efficient Cleaning of Heating and - cbpg.com

    2020-6-3 · Nozzle geometry and nozzle diameter, as well as the blowing pressure, are essential factors that determine the water jet quality. In the cleaning operation, the water impact angle, the water volume and the size of the covered area must match the intensity and characteristics of the deposit. By varying the water jet speed, the impact time is ...

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  • Cold spray coating: review of material systems and future ...

    2020-2-12 · The nozzle was made of transparent quartz to allow the visualization of cavitating flows inside the nozzle. The geometry of the quartz nozzle is illustrated in Fig. 2, and the detailed dimensions of the nozzle are presented in Table I. The inner and outer diameters of the first part of the nozzle were exactly the same as the stainless-steel ...

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