Navier-Stokes Computstions of the Supersonic Ejector Diffuser System with a Second Throat

查看全文 作　　者：Heuy-[1]DongKim;[2]ToshiakiSetoguchi;等 机构地区：[1]SchoolofMechanicalEngineering,AndongNationalUniversity388,SOngchun-dong,Andong760-749,Korea;[2]Departmen 出　　处：《Journal of Thermal Science》索引1999年第8卷第2期,共10页 摘　　要：The supersonic ejector-diffuser system with a second throat was simulated using CFD. An explicit finite volumescheme was aPPlied to solve tWo-dimensional Navier-Stokes equations with standard k - E tulbulence model. Thevacuum Performance of the supersonic ejector-diffuser system was investigated by changing the ejector throat arearatio and the operating Pressure ratio. Two convergent-divergent nozzles with design Mach nUmber of 2. 11 and 3.41were selected to give the supersonic operahon of the ejector-diffoser system. The presence of a second throat stronglyaffected the shock wave sir’UctUI’e inside the 'dxing tube as well as the spreading of the under-expanded jetdischarging from the Primary nozzle. There were optimum values of the operating pressure ratio and ejector throatarea ratio for the vacuum performance of the system to maximize. 关 键 词：可压缩流体 超声发射器 汽化器 激波