超声速进气道湍流流场的数值模拟

NUMERICAL SIMULATION OF TURBULENT FLOW FIELD SUPERSONIC INLET

关键词:  超声速进气道  有限体积法  纳维尔－斯托克斯方程  激波

Key words:  Supersonic inlet  Finite volume method  Navier Stokes equation  Shock wave

摘要:

采用有限体积法数值模拟了超声速进气道的湍流流场，改进了离散纳维尔－斯托克斯方程中粘性项的方法，使之具有较好的守恒性，研究使用了变系数的隐式残差光顺等加速收敛技术，并讨论了超音来流、收敛型进气道复杂流场初场的给定方法，所得到的数值解正确地展示了流场的复杂激波结构。

Abstract:

A numerical analysis method of three dimensional compressible viscous flow of rectangular supersonic inlet for Hypersonic Ramjet Engine (HRE) was studiedThe major characteristics of this kind of inlet are:ploy shock wave structure,boundary layer shock wave interaction,and second flow existing in the flow field at same timeThe method is based on Jameson’s finite volume schemeIn stead of difference method,an integral scheme is adapted to disperse the viscous terms of Navier Stokes equations ensure the conservation of the schemeVarying coefficient implicit residual smoothing technique was studied to accelerate convergence The specified initial flow field and boundary condition for the supersonic convergence path was discussed