尖拱弹身横向喷流数值模拟

Numerical simulation of supersonic lateral jet interactions for an axisymmetric body in supersonic flow

本文通过数值求解层流Navier Stakes方程来模拟超声速流场中横向超声速喷流的干扰流场,采用分块对接网格和"O"型网格技术,精确模拟喷口截面形状并生成高质量的贴体计算网格,对尖拱弹身的横向超声速喷流的干扰流场进行了数值模拟,研究了喷口附近的流场结构、涡系结构、波系结构及流动分离等流场特性,得到喷流流场的干扰效应。

The lateral jet interaction in supersonic flow is simulated numerically by solving the NS equation in this paper. To more easily model the nozzle geometry and resolve the complex flow physics associated with the lateral jet problem, the multi-block point matched grid generation technique and 'O' type grid technique have been applied. On the base of these the detailed numerical simulation for an axisymmetric body in the supersonic flow is performed .The predicted results show excellent agreement with the experimental measurement. Some conclusions were obtained by investigating the characteristics of the flow vortex structure、the shock wave structure and the large scale separation of flow.