Numerical Simulation of the Supersonic Flows in the Second Throat Ejector-Diffuser Systems

查看全文 作　　者：[1]HeuydongKim;[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4期,共9页 摘　　要：The supersonic ejector-diffuser system with a second throat was simulated using CFD. A fully implicit finite volume scheme was applied to solve the axisymmetric Navier-Stokes equations and a standard k-E turbulence model was used to close the governing equations. The flow field in the supersonic ejectordiffuser system was investigated by changing the ejector throat area ratio and the secondary mass flow ratio at a fixed operating pressure ratio of 10. A convergent-divergent nozzle with a design Mach number of 2.11 was selected to give the supersonic operation of the ejector-diffuser system. For the constant area mixing tube the secondary mass flow seemed not to significantly change the flow field in the ejector-diffuser systems. It was, however, found that the flow in the ejector-diffuser systems having the second throat is strongly dependent on the secondary mass flow. 关 键 词：可压缩流体 超声速喷射系统 超声速扩散系统