超声速侧向多喷流干扰特性数值模拟

为了研究多个喷流喷管对导弹控制力的干扰影响,本文通过数值求解N-S方程来模拟超声速外流场中横向喷流的干扰流场,采用分块对接网格和"O"型网格技术,精确模拟喷口截面及弹翼形状,生成高质量的贴体计算网格。通过对多种喷管控制组合的超声速横向喷流干扰流场的数值模拟,研究和分析了喷口附近流场的涡系结构和波系结构,并将喷管几种排列组合对导弹喷流干扰力放大因子的影响进行了分析研究,得出一些多喷流干扰的结论。

Numerical investigation of supersonic jet interactions for tactical bodies

The interaction between lateral multi-jet and the supersonic external flow was investigated for tactical bodies.To obtain the numerical results by solving the N-S Equation.To more exactly model the nozzle geometry and resolve the complex flow associated with the lateral multi-jet problem,the multi-block point matched grid generation technique and "O" type grid technique was applied. The detailed numerical simulation for a variety of lateral jets in the supersonic flow is performed.The computations were performed at Mach number 3.The characteristics of the vortex structure,the shock wave structure and the large scale separation of flow were investigated.The interaction parameters on angle of attack and lateral jet number were analysed.Some interesting conclusions were obtained.