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- W2391909470 abstract "In order to increase the effective working time of vacuum ball exhaust system for supersonic wind tunnel with Ma=4 and Ma=7,secondary-throat is utilized as a part of diffuser between test section and vacuum ball.To optimize the performance of vacuum ball exhaust system,two related aspects are numerically investigated with computational fluid dynamics software in this paper.The first is about the effects of blockage ratio(engine model vs.main nozzle) on cross area of secondary-throat to start the supersonic wind tunnel while the other is about the effects of secondary-throat cross area on critical pressure(maximum working pressure) of vacuum ball.It is concluded that the area of secondary-throat nonlinearly increases with engine/main nozzle blockage ratio,and the critical pressure is decreasing rapidly as well.The secondary-throat area should be optimized according to different engine/main nozzle blockage ratio and different testing Mach number." @default.
- W2391909470 created "2016-06-24" @default.
- W2391909470 creator A5042271521 @default.
- W2391909470 date "2012-01-01" @default.
- W2391909470 modified "2023-09-27" @default.
- W2391909470 title "Optimization on Secondary-Throat of Supersonic Wind Tunnel with Different Model Blockage" @default.
- W2391909470 hasPublicationYear "2012" @default.
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