| Navier—Stokes Computations of the Supersonic Ejector—Diffuser System with a Second Throat |
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| 引用本文： | Heuy－DongKim,ToshiakiSetoguchi,等.Navier—Stokes Computations of the Supersonic Ejector—Diffuser System with a Second Throat[J].热科学学报(英文版),1999,8(2):79-83. |
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| 作者姓名： | Heuy－DongKim ToshiakiSetoguchi 等 |
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| 作者单位： | [1]SchoolofMechanicalEngineering,AndongNationalUniversity388,SOngchun－dong,Andong760－749,Korea [2]Departmen,AndongNationalUniversity388,SOngchun－dong,Andong760－749,Korea |
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| 摘 要： | The supersonic ejector-diffuser system with a second throat was simulated using CFD.An explicit finite volume scheme was applied to solve two-dimensional Navier-Stokes equations with standard κ-εturbulence model.The vacuum performance of the supersonic ejector-diffuser system was investigated by changing the ejector throat area ration and the operating pressure ratio.Two convergent-divergent nozzles with design Mach number of 2.11 and 3.41 were selected to give the supersonic operation of the ejector-diffuser system.The presence of a second throat strongly affected the shock wave structure inside the mixing tube as well as the spreading of the under-expanded jet discharging from the primary nozzle.There were optimum values of the operating pressure ratio and ejector throat area ratio for the vacuum performance of the system to maximize.
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| 关 键 词： | 可压缩流体 超声发射器 汽化器 激波 |
Navier-Stokes computations of the supersonic ejector-diffuser system with a second throat |
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| Heuy-Dong Kim,Toshiaki Setoguchi,Shen Yu,S. Raghunathan.Navier-Stokes computations of the supersonic ejector-diffuser system with a second throat[J].Journal of Thermal Science,1999,8(2):79-83. |
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| Authors: | Heuy-Dong Kim Toshiaki Setoguchi Shen Yu S Raghunathan |
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| Affiliation: | (1) School of Mechanical Engineering, Andong National University 388, Songchun-dong, 760-749 Andong, Korea;(2) Department of Mechanical Engineering, Saga University 1, Honjo-machi, Saga-shi, 840-8502 Saga, Japan;(3) Institute of Engineering Thermophysics, Chinese Academy of Sciences, P.O. Box 2706, 100080 Beijing, China;(4) Department of Aeronautical Engineering, The Queen’s University of Belfast, David Keir Building, Stranmillis Road, BT9 5AG Belfast, Northern Ireland, UK |
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| Abstract: | The supersonic ejector-diffuser system with a second throat was simulated using CFD. An explicit finite volume scheme was
applied to solve two-dimensional Navier-Stokes equations with standard k – ε turbulence model. The vacuum performance of the supersonic ejector-diffuser system was investigated by changing the ejector
throat area ratio and the operating pressure ratio. Two convergent-divergent nozzles with design Mach number of 2.11 and 3.41
were selected to give the supersonic operation of the ejector-diffuser system. The presence of a second throat strongly affected
the shock wave structure inside the mixing tube as well as the spreading of the under-expanded jet discharging from the primary
nozzle. There were optimum values of the operating pressure ratio and ejector throat area ratio for the vacuum performance
of the system to maximize. |
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| Keywords: | compressible flow supersonic ejector supersonic diffuser internal flow shock wave turbulent mixing |
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