Abstract: The varieties of flow characteristics in supersonic open cavity were analyzed with different Length/Depth or Reynolds number. Five order WENO scheme and three order Runge Kutta algorithm with the TVD characteristics were used. The turbulent B L model was adopted. Through numerical analyzed, the clear images of open cavity at different time were got .The nature of periodic oscillation in open cavity is the interactions of the pressure wave, vortex and cavity structure, but different cavity have different characteristics.

Key words: Supersonic flow;WENO scheme;Unsteady flow;Cavity flow;Numerical simulation

摘要： 研究了不同长深比、不同雷诺数条件下 ,超声速开式空腔流动特性的变化。算法采用空间上 5阶的WENO格式 ,时间上具有TVD性质的 3阶Runge Kutta方法 ,湍流模型选用B L模型。数值模拟获得了不同时刻的流场图像 ,压力波、涡以及空腔结构之间的相互耦合作用 ,使得空腔内存在典型的周期性压力脉动 ,但不同长深比空腔的流动特性存在较大差别

关键词: 超声速流;WENO格式;非定常流;空腔流;数值仿真