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  • An experimental study on the control of plug nozzle

    2021-2-12 · Abstract. 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 ...

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  • Film cooling performance and flow field of

    2020-9-1 · This was due to the effect of secondary hole in mitigating the primary hole vortex. Sun et al. compared the performance of a double jet hole with other geometries by keeping the exit area same for all configurations. The sister hole for the double jet had a compound angle of γ = 30°and α = 30°. The coolant jets from the holes formed a complex vortex structure and forced the coolant to adhere to the …

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  • Spray cooling by solid jet nozzles using alumina/water ...

    2012-12-1 · The effects of the suspensions of Al 2 O 3 nanoparticles on the overall heat transfer performance for spray cooling using a solid jet nozzle were experimentally and theoretically studied at various flow rates and nanoparticle fractions. Based on a thermal probe embedded in the testing plate, the cooling curves, which represented the transient temperature variations of the plate, were measured.

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  • Virendra KUMAR | Professor (Assistant) | Ph.D (IIT

    2020-5-25 · The droplets of ultra-fine size with high-speed produced by the new nozzle will have a strong trapping effect on respiratory dust and will save more energy by the vacuum force siphon than currently used nozzles (the amount of gas saved by the same efficiency is 40% and …

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  • Water-Jet Guided Laser Cutting Technology- an

    2010-2-1 · A drop forms as a result of the inertial pressure. This pressure equals to ρ v 2 2 in which, ρ is the density of liquid and v is velocity and balanced against the restraining pressure 2γ/r. γ is the surface tension and r is the radius of the deforming surface. By taking a ratio of these two pressures, Weber (We) number can be defined.

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  • Supersonic antigravity aerodynamic atomization

    Although the fundamental analysis of nozzles applies to both air-breathing and rocket engines, this study emphasizes nozzles for jet aircrafts. It further discuses the frictional effect, the drag effect, and the energy transfer effects on the nozzle. Another part of the chapter explains the effect of sample area change in the nozzle …

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  • Effect of filtration on the morphology and mechanical ...

    2021-5-15 · In addition to the above, proper failure analysis of the coating developed at low and high stand-off distance for both the mechanical properties such as microhardness and adhesion strength has been performed by microstructural analysis. The effect of various physical properties of the coating on the hardness and adhesion strength have been studied.

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  • Theory of Aerospace Propulsion | ScienceDirect

    2021-8-6 · 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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  • Thermodynamic Analysis of Ammonia-Water Absorption ...

    2018-8-17 · COP of double-effect cycle is 30% higher than that of the conventional single effect absorption refrigeration cycle at same working condition. With increase in temperature of different part of the system, performance coefficient and exergy efficiency of …

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  • Virendra KUMAR | Professor (Assistant) | Ph.D (IIT

    2016-8-5 · In order to study the internal condensation phenomenon of water vapor ejector and its effect on the performance of steam jet pump, Ariafar et al. made a numerical study on the primary nozzle of a steam ejector with the area ratio of 11, 18 and 25 so as to investigate the flow characteristics differences between ideal gas model and wet steam ...

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  • Numerical study for the influences of primary nozzle

    2012-12-1 · The solid jet nozzle gave a compact stream jet and had an extraordinarily uniform liquid ... The mechanical properties reported in Table 6 were ... The correlation results indicate that the impact duration time has a major effect on the heat transfer performance in spray cooling and the HTC is a function of 2.8th power of the duration ratio or ...

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  • Spray cooling by solid jet nozzles using alumina/water ...

    2012-4-2 · 6.3.5 Stand-off distance effects. The influence of stand-off distance on depth of cut is shown in Fig. 6.18. Depth of cut decreases continuously if stand-off distance increases, but the decrease is only marginal. The major reason may be the deceleration of abrasive particles due to air friction, and it was in fact shown by Khan and Geskin (1995 ...

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  • Stand-off-Distance - an overview | ScienceDirect Topics

    2017-2-13 · Department of Mechanical Engineering, College of Engineering, University of Babylon, Babylon, Iraq Accepted 02 Feb 2017, Available online 12 Feb 2017, Vol.7, No.1 (Feb 2017) Abstract Flame speed and laminar burning velocity are two important aspects of fuel combustion characteristic. They both affect combustion system design and performance.

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  • A Review of Laminar Burning Velocity and Flame Speed of ...

    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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  • BLASTING TECHNICAL INFORMATION - MC Finishing

    2018-5-1 · Study of the effect of shielding gas composition on the mechanical weld properties of steel ST 37-2 in gas metal arc welding Mater. Des. , 30 ( 2009 ) , pp. 3891 - 3895 , 10.1016/j.matdes.2009.03.031

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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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  • A Review of Laminar Burning Velocity and Flame Speed of ...

    2017-10-15 · Nozzle was an important component of the drilling device assisted with water jet, which had a profound influence on the effect of water jet drilling. The pressure and velocity distribution characteristics of the flow field were investigated through the numerical simulation to analyze the debris carrying performance and rock breaking performance.

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  • A Review of Laminar Burning Velocity and Flame Speed of ...

    2021-7-23 · All papers published in this volume of IOP Conference Series: Materials Science and Engineering have been peer reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.

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  • Spray Equipment and Calibration — Publications

    Spray Equipment and Calibration. (AE73, Revised March 2018) Download PDF. Many pesticides used to control weeds, insects, and disease in field crops, ornamentals, turf, fruits, vegetables, and rights-of-way are applied with hydraulic sprayers. Tractor- mounted, pull-type, pickup-mounted and self-propelled sprayers are available from numerous ...

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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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  • Fundamentals of Electrostatic Spraying: Basic

    2012-5-22 · Effect of operational variables, microstructure and mechanical properties on the erosion of Ti-6Al-4V Wear, Vol. 142, No. 2 Numerical simulation of tube erosion by particle impaction

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  • Erosion Prediction in Turbomachinery Resulting from ...

    The effect of acoustic parameters on the breakup characteristics of a liquid sheet formed by oblique jet impingement in the presence of an acoustic field was investigated by Dighe & Gadgil (Reference Dighe and Gadgil 2018). Abrupt sheet breakup is observed for water sheets due to the low viscosity of water.

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  • Diesel Fuel Injector Nozzles

    2020-6-18 · One way of achieving higher efficiency in electro-mechanical is by inducing vortices over the heated surface with the help of a vortex generator (VG). The strength of these vortices is proportionate to the amount of heat transported.

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  • On the nature of instabilities in externally perturbed ...

    2020-12-1 · We report experiments on crystallization of highly undercooled forsterite melt droplets under atmospheric and sub-atmospheric pressure conditions. Experiments have …

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  • Numerical Study on Effect of Secondary Surface on ...

    2021-3-8 · The spreading of the jet has been found to reduce by increasing the velocity of the plate. The jet half-width lies very close to the wall for the plate to jet velocity 1.5 and 2. For two extreme limits of plate velocity, i.e., U plate = 0 and 2, the nearly self-similar profiles are observed at different axial locations in the wall jet region.

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