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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 ...
Get Price2016-1-13 · Turbulent Jet Entrainment is important in understanding the nature of volcanic jets. The e ect of nozzle exit shape is studied on four di erent kinds of supersonic free jets. A very strong in uence of nozzle exit shape is seen in the near eld of the jet, where the complex nozzles show high rates of …
Get Price2013-9-8 · nozzle plate. In this study the effect of nozzle jet exit velocity, heat sink array, and the height of pin fin on the average Nusselts number (Nu. a) are studied. Numerical investigation is carried out on multi air jet array of 3x3, 5x5 and 10x10(nozzle diameter 5, 3 and1.5mm) impinging on aluminum pin fin heat
Get Price2017-4-25 · Finally, the pressurized air goes through the rectangular slot nozzle and generates the slot jet. The flow rates were measured directly from the rotameter. Two dimensional slot nozzle with 3 mm width and an aspect ratio of 21:1 to produce uniform velocity profile at its exit is used for the study. According to the hydraulic diameter of the ...
Get Price2010-5-24 · simulate nozzle flow operating conditions with hot jet exhaust and associated afterbody-nozzle geometry during wind tunnel experiments. The geometry details of these two afterbody configurations corresponding to dry, reheat and intermediate nozzle operating conditions are as given i n the Figs. I and 2. It may be noted that the configurations
Get Price2020-7-13 · An experimental investigation is carried out on an inverse diffusion flame (IDF) burners having central air jet and being surrounded by fuel jets for an impingement heat transfer. A thorough investigation has been performed to study the effects of the diameter of air jet, orientation of fuel jets and swirl in the central air jet …
Get PriceA numerical study has been conducted to analyze the effect of nozzle exit geometry (lobed nozzle) on temperature mixing at the wake of jet. A lobed nozzle is a plate with corrugated edges and facilitates efficient mixing of co-flow streams. It
Get Price2011-5-11 · In this study, numerical simulations were carried out to determine the effects of area ratio, setback distance, mixing tube length, and shape of the driving nozzle on the performance of the jet pump. It was seen that major losses arise in the jet pump primarily due to an improper mixing of primary and secondary fluids and because of the ...
Get PriceMrinal Kaushik* and E. Rathakrishnan Tab Aspect Ratio Effect on Supersonic Jet Mixing Abstract: The efficacy of introducing mixing promoting small-scale vortices by two rectangular tabs, of aspect
Get Price2019-11-13 · nozzle decides the measure of push delivered by the nozzle. In fig. 1[a], [b] shown use of CD nozzle in jet engine to boosting the thrust output. [6-8] Fig: 1 [a] worked on “Design and fluid flow analysis of ConvergentApplication of CD nozzle in Jet engine, [b] Application of bell shape nozzle.
Get PriceAll nozzles showed comparable mass flow rates for the same impact force and the difference was in the order of 5% better than a straight pipe geometry. Only the energy saving nozzle used around 10% less mass flow and is the best solution to reduce compressed air consumption without losing performance. en_ZA. dc.description.librarian.
Get Price2012-5-17 · Effect of axisymmetric sonic nozzle geometry on characteristics of supersonic air jet Journal of Thermal Science, Vol. 13, No. 2 An experimental study of underexpanded sonic, coaxial, swirl jets
Get Price2013-9-8 · nozzle plate. In this study the effect of nozzle jet exit velocity, heat sink array, and the height of pin fin on the average Nusselts number (Nu. a) are studied. Numerical investigation is carried out on multi air jet array of 3x3, 5x5 and 10x10(nozzle diameter 5, 3 and1.5mm) impinging on aluminum pin fin heat
Get Price2007-12-1 · The effect of nozzle diameter on the plume length has been studied by performing the CFD simulations at different nozzle diameters for condensation (d 0 = 0.4, 0.79, 1.58, 3.76, 6.35, and 9.5 mm) and reaction jets (d 0 = 0.79, 1, 2, 3.76, and 6.35 mm) by varying nozzle gas velocities and bath temperatures.Tables 2A and 2B summarize the operating conditions (nozzle diameter and its orientation ...
Get Price2007-10-31 · Convective heat transfer to an impinging air jet is known to yield high local and area averaged heat transfer coe–cients. The current research is concerned with the mea-surement of heat transfer to an impinging air jet over a wide range of test parameters. These include Reynolds Numbers, Re, from 10000 to 30000, nozzle to impingement
Get Price2020-4-30 · In this paper, a numerical study was performed to examine the effect of divergent nozzle length of single-hose dry ice blasting on the development of acoustic power level. The active working medium is the mixture of solid dry ice particles and compressible air fluid at the inlet section. The two-dimensional planar model was solved using the finite volume method. The model has been verified ...
Get Price2021-4-2 · Nozzles are used to increase the velocity to get more thrust and also control the uniform direction of air-fuel mixture flow come from turbine. In nozzle, the static energy (due to flow after turbine) is converted into kinetic energy and that kinetic energy create shear between flow and surrounding because of this noise will produced in jet engine.
Get Price2014-7-1 · It is important to know about the bath behavior to reduce the blow time and splashing in top of the converter. The target of this work is to compare works on the effect of twisted nozzle, flow and lance height in the jet penetration by visual inspection and by energy balance that consider number of nozzles, vertical and twist angles.
Get Price2018-10-24 · 3. Results and Discussion. To investigate the effect of initial Re on the jet development, four simulations with different nozzle diameters D j = 0.0012, 0.0015, 0.0018, and 0.0021 m were run with grid 2 based on the grid study results. With the same initial mass flow rate 0.031 kg/s as in the PIV measurement by Larsson et al. [], the jet initial velocities are U j = 27.70, 17.73, 12.31, and 9 ...
Get Price2021-2-12 · 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 flow characteristics are studied by the ...
Get Price2011-5-11 · In this study, numerical simulations were carried out to determine the effects of area ratio, setback distance, mixing tube length, and shape of the driving nozzle on the performance of the jet pump. It was seen that major losses arise in the jet pump primarily due to an improper mixing of primary and secondary fluids and because of the ...
Get Price2016-3-1 · Based upon the computed results, the nozzle geometry has significant influences on the discharge coefficient, profile of sonic lines and on the nozzle downstream flow features. Jet boundaries, shear layers and lengths of supersonic core of jets were investigated to clarify the performance of nozzles on the downstream flows. 2.
Get Price2013-6-25 · To illustrate the sole effect of the nozzle geometry, we chose two axisymmetric, single-orifice, high-pressure diesel nozzles with a subtle yet distinctive difference in feature: one had a rounded ...
Get Price2018-10-3 · and air into the combustor without any premixing. Since the fuel and air are not premixed, the perfor-mance of LDI heavily depends upon the design of the air swirler.14 Dunand et al.15 experimentally investigated the influence of a swirling annular gas jet, momentum flux ratio, and surrounding pressure on the breakup and atomization of liquid jet.
Get Price2017-12-16 · The nozzle exit geometry factors like hydraulic diameter (D h) and shape factor ( ζ) were governed by exit geometry shape. The aspect ratio of characteristic major to mi-nor dimensions was 2:1 for rectangular and elliptical shaped nozzles. The nozzle exit geometry shapes are shown in fig. 3.
Get Price2019-11-13 · nozzle decides the measure of push delivered by the nozzle. In fig. 1[a], [b] shown use of CD nozzle in jet engine to boosting the thrust output. [6-8] Fig: 1 [a] worked on “Design and fluid flow analysis of ConvergentApplication of CD nozzle in Jet engine, [b] Application of bell shape nozzle.
Get Price2020-9-25 · nozzle. Her results depicted higher exit velocity and higher degree of flow separation with contour nozzles compared to corresponding conical nozzles. Ahmed H. Osman [3] interpreted the CFD simulation of De Laval nozzle geometry and effect of gas pressure variation at the entrance. He
Get Price2020-3-27 · two phase flow ejector motive nozzle, suction nozzle and diffuser are the main parts. Objective of the ejector design is to determine all diameters and length of these sections this ejector. By using Henry and Fauske model (Henry and Fauske, 1971) we will determine the motive nozzle throat diameter is designed.
Get Price2021-2-8 · Papamoschou, D., and Shupe, R.S.., 'Effect of Nozzle Geometry on Jet Noise Reduction Using Fan Flow Deflectors,' AIAA-2006-2707, 12th AIAA/CEAS Aeroacoustics Conference, May 8-10, 2006, Cambridge, MA.
Get Price2017-4-2 · The effect of nozzle configuration on the jet flow field is discussed with predicted mean flow and turbulent flow data. Near-field of multiple jets shows the nonlinear behavior. Multiple jets show better performance in the near-field based on entrainment, secondary flows, and …
Get Price2019-9-27 · Transient infrared thermography is used for mapping the temperatures over the surface, and the heat transfer coefficients are estimated using a semi-infinite approximation methodology. Results show that, for circular jets, the effect of the jet diameter on the local and the spanwise-averaged Nusselt number is most pronounced near the jet exit.
Get Price2019-6-24 · Nozzle case are shown below in the Figures 10 and 11. The present study is focused on optimizing the design and performance of jet fan with CD nozzle enclosure. The conventional cylindrical jet fan and the CD Nozzle along with fan, rotor and fixture are modeled and assembled using Catia V5 software. The model is
Get Price2018-2-2 · nozzle are directly linked to the jet noise generated, the TKE is an important indication of the jet noise produced by a given nozzle. Other jet mixing parameters such as the centerline total temperature decay and the centerline velocity of the jet flow exiting each nozzle are also analyzed.
Get Price2016-2-4 · Flaring of the Jet Cavity dimension changes with a change in NTD. Abrasive particles repeatedly hit on the work surface. Brittle fracture separates out tiny particles (wear particles) to produce a cavity. Cavity width ≥ Nozzle inner diam. (Depends on NTD). Cavity Depth depends on work piece feed rate, abrasive particle mass (or density) and pressure (or velocity of the jet).
Get Price2019-4-18 · A hot jet in the cold surrounding spreads faster than a cold jet in the same surrounding. For any downstream axial distance, the maximum velocity is at the centre and minimum at the periphery such that a parabolic is developed as shown in Fig.2 Figure 2. Jet dynamics from the burner as nozzle Table 2: Burner velocity arrangement
Get Price2015-1-8 · Critical Effect of Rotor Vanes with Different Injection Angles on Performance of a Vaned Type Novel Air Turbine Bharat Raj Singh1* and Onkar Singh2 1*Professor and Head of Department - Mechanical Engineering, Associate Director, SMS Institute of Technology, Lucknow-227125, Uttar-Pradesh, India
Get Price2017-2-8 · nozzle jet ejector and is as follows A. Experimental set up 1. The experimental Setup for industry scale jet ejector is shown schematically in Figure 2. concentration and gas concentration. The results are compiled. Fig. 1 Detail of the jet ejector used in experimental setup These experiments were conducted on industrial stage
Get Price2013-11-13 · As per the geometry of jet engine, maximum thrust is available only at the exit of nozzle. It is seen in bucket target type of thrust reverser mechanism is more efficient than other types because maximum amount of thrust which is coming out from jet engine is made to be reversed by using deflector doors at the back of jet engine. 4.
Get Price2020-1-8 · Proceedings of the 4th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT'17) Toronto, Canada – August 21 – 23, 2017 Paper No. 110 DOI: 10.11159/ffhmt17.110 110-1 Computational Analysis of Bell Nozzles Beena D. Baloni, Sonu P. Kumar, S. A. Channiwala
Get Price2021-6-28 · 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”). The suction systems work fine and can be continuously blasted as ...
Get Price2016-7-20 · 2.2 Design and Fabrication of Air-jet Nozzle An air-jet nozzle for cone winding machine has been designed and fabricated in the laboratory. The basic geometry of the air-jet nozzle is shown in Fig. 1. It consists of two components, i.e. vortex assembly …
Get Price2021-2-8 · Papamoschou, D., and Shupe, R.S.., 'Effect of Nozzle Geometry on Jet Noise Reduction Using Fan Flow Deflectors,' AIAA-2006-2707, 12th AIAA/CEAS Aeroacoustics Conference, May 8-10, 2006, Cambridge, MA.
Get Price2017-11-29 · [4] published the effect of cross flow and array of jet on heat Transfer. Lee et al . [5] carried out experiments to study the effect of curvature of concave surface on heat transfer parameter by using round impingement jet. Yang et al . [6] performed experimental study to analyse the effect of nozzle …
Get Price2016-7-20 · Indian Journal of Fibre & Textile Research Vol. 41, March 2016, pp. 47-54 Effect of linear density of feed yarn filaments and air-jet texturing process variables on compressional properties of woven fabrics R K Baldua, R S Rengasamy & V K Kotharia Department of Textile Technology, Indian Institute of Technology, New Delhi 110 016, India
Get Price2019-9-27 · Transient infrared thermography is used for mapping the temperatures over the surface, and the heat transfer coefficients are estimated using a semi-infinite approximation methodology. Results show that, for circular jets, the effect of the jet diameter on the local and the spanwise-averaged Nusselt number is most pronounced near the jet exit.
Get PriceFuel injector coking involves deposit formation on the external or the internal surfaces of an injector or nozzle. This deposition of carbonaceous particles can result in uneven fuel-spray characteristics or localised burning (hot spots), which may eventually lead to mechanical failure or simply have a detrimental effect on the combustion system.
Get Priceof air and water) and free surface in nature. Numerical calculation is useful to understand flow physics as well as effect of geometry on flow. The optimized design is obtained using in-house special optimization loop. Either single phase or two phase unsteady numerical calculation could be performed.
Get Price2021-4-9 · Diameter of nozzle {mm) Contours of Temperature D=0.8 2.604+03 D=1.0 2.543+03 Mishra, S. C., & Sahoo, N. (2007). D=1.2 2.124+03 analysis 4. CONCLUSIONS After all, the work done, the results show interesting results. It is clear that the changing the circular geometry in to nozzle shape significant effect on
Get Price2020-3-27 · two phase flow ejector motive nozzle, suction nozzle and diffuser are the main parts. Objective of the ejector design is to determine all diameters and length of these sections this ejector. By using Henry and Fauske model (Henry and Fauske, 1971) we will determine the motive nozzle throat diameter is designed.
Get Price2018-10-9 · 767 On the Flow of a Compressible Fluid through Orifices By D. A. Jobson* By making certain basic assumptions, the author has determined a theoretical expression for the contraction coefficient, C, appropriate to an orifice when transmitting a compressible fluid, either
Get Price2015-9-1 · The large eddy simulation (LES) with Volume of Fluid (VOF) interface tracking method in Ansys-FLUENT has been used to study the effects of nozzle hole geometrical parameters on gasoline direct injection (GDI) fuel injectors, namely the effect of inner hole length/diameter (L/D) ratio and counter-bore diameters on near field spray characteristics.
Get Price2015-7-27 · associated mainly with jet exhaust plume effects, afterbody contours, nozzle afterbody geometry, tail support boom, fairing design, nozzle/engine spacing etc.[5-9]. To understand evaluate behaviour of these complex jets freestream interactions, a hardware system has been developed for the tests in base flow wind tunnel [10-12]. The
Get Price2003-2-1 · Influences of nozzle flow and nozzle geometry on the shape and size of an air core in a hollow cone swirl nozzle M R Halder, S K Dash, and S K Som Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 2003 217 : 2 , 207-217
Get Price2018-6-17 · Effect of Nozzle Geometry on Diesel Emissions Fuelled With Biodiesel Blends - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Effect of TiO2 and nozzle geometry on diesel emissions fuelled with biodiesel blends by Manigandan
Get Price2016-7-20 · Indian Journal of Fibre & Textile Research Vol. 41, March 2016, pp. 47-54 Effect of linear density of feed yarn filaments and air-jet texturing process variables on compressional properties of woven fabrics R K Baldua, R S Rengasamy & V K Kotharia Department of Textile Technology, Indian Institute of Technology, New Delhi 110 016, India
Get Price2016-4-5 · This paper examines the combustion and emissions produced using a prototype fuel injector nozzle for pilot-ignited direct-injection natural gas engines. In the new geometry, 7 individual equally-spaced gas injection holes were replaced by 7 pairs of closely-aligned holes (“paired-hole nozzle”). The
Get Price2019-4-18 · A hot jet in the cold surrounding spreads faster than a cold jet in the same surrounding. For any downstream axial distance, the maximum velocity is at the centre and minimum at the periphery such that a parabolic is developed as shown in Fig.2 Figure 2. Jet dynamics from the burner as nozzle Table 2: Burner velocity arrangement
Get Price2019-9-27 · Transient infrared thermography is used for mapping the temperatures over the surface, and the heat transfer coefficients are estimated using a semi-infinite approximation methodology. Results show that, for circular jets, the effect of the jet diameter on the local and the spanwise-averaged Nusselt number is most pronounced near the jet exit.
Get PriceFuel injector coking involves deposit formation on the external or the internal surfaces of an injector or nozzle. This deposition of carbonaceous particles can result in uneven fuel-spray characteristics or localised burning (hot spots), which may eventually lead to mechanical failure or simply have a detrimental effect on the combustion system.
Get PriceThe 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 simulation software combined.
Get PriceDownload Free PDF. Download Free PDF ... Analytical and Numerical Studies of a Steam Ejector on the Effect of Nozzle Exit Position and Suction Chamber Angle to Fluid Flow and System Performance. Download. ... Steam Jet Ejector Using CFD A Review. By IRJET Journal. Development Practices in Ejector Technology for Refrigeration and Air ...
Get Price2019-2-4 · Anderson and Williams [1] worked on base pressure and noise produced by the abrupt expansion of air in a cylindrical duct. With an attached flow the base pressure was having minimum value which depends mainly on the duct to nozzle area ratio and on the geometry of the nozzle. The plot of overall noise showed a minimum
Get Price2015-1-5 · 1. Fluid Jet Geometry • Location and orientation of ATF fluid jets • Nozzle type/geometry • System flow rate • Jet velocity • Parasitic power 2. Relative positon between measured heat transfer and jet location • Impact of gravity and free fluid flow • Fluid interactions between jets
Get Price2019-4-21 · The concept of nozzle was first studied at the Jet Propulsion Laboratory in 1949. In the late 1960s, Rocket dyne patented this nozzle concept, which has received attention in recent years in the U.S. and Europe. Figure illustrates the design of this nozzle concept with its typical inner base nozzle, the wall
Get Price2017-10-27 · Anuj Bajpai and Ethirajan Rathakrishnan Tab Geometry Effect on Supersonic Elliptic Jet Control, International Journal of Trubo and Jet Engines, 2016, DOI 10.1515/tjj, 2016-0020. Defromont Thomas and E Rathakrishnan Supersonic Jet Control with Air …
Get Price2020-1-8 · Proceedings of the 4th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT'17) Toronto, Canada – August 21 – 23, 2017 Paper No. 110 DOI: 10.11159/ffhmt17.110 110-1 Computational Analysis of Bell Nozzles Beena D. Baloni, Sonu P. Kumar, S. A. Channiwala
Get Price2014-10-24 · A new nozzle system for the efficient production of multi-layered nanofibers through electrospinning is reported. Developed a decade ago, the commonly used coaxial nozzle system consisting of two ...
Get Price2013-11-13 · As per the geometry of jet engine, maximum thrust is available only at the exit of nozzle. It is seen in bucket target type of thrust reverser mechanism is more efficient than other types because maximum amount of thrust which is coming out from jet engine is made to be reversed by using deflector doors at the back of jet engine. 4.
Get PriceThe 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 simulation software combined.
Get Price2021-6-28 · 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”). The suction systems work fine and can be continuously blasted as ...
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