二维高亚声速空腔流激振荡的数值模拟研究  

Numerical simulation of 2-D high subsonic cavity flow oscillation

作　　者：罗柏华[1] 

机构地区：[1]上海大学上海市应用数学和力学研究所,上海200072

出　　处：《空气动力学学报》2002年第1期84-88,共5页Acta Aerodynamica Sinica

摘　　要：采用基于P .L .Roe的近似Riemann解的修正Osher&Chakravarthy (MOC)三阶TVD有限差分格式 ,数值求解二维雷诺平均全Navier Stokes方程 ,并用Cebeci Smith代数湍流模型 (对腔内区域作修正 )来模拟湍流效应 ,时间方向的积分采用四阶Runge Kutta方法 ,通过对GAMM超音速前台阶绕流的计算 ,验证了格式及程序的有效性 ,对高亚声速来流下的空腔流动作了数值模拟研究 。The flow induced oscillation in a rectangular cavity is studied numerically by solving the two dimensional time-dependent Reynolds averaged Navier Stokes equations, Turbulence closure is achieved using Cebeci Smith model with relaxation modification. The algorithm used here is the Modified Osher Chakravarthy Scheme which is based on Roe's flux difference split approximate Riemann solver. Solution is advanced in time by a four stage Runge Kutta time stepping scheme. This approach is verified by the GAMM example. High subsonic cavity flow is calculated and the self sustained oscillations are produced clearly.

关 键 词：亚声速流 空腔流动 数值模拟 流动振荡 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]