喷流-外流干扰流场数值模拟

 研究了一种适用于推力矢量的内外流干扰复杂流场的数值模拟方法。主要讨论了能灵活处理复杂外形的重叠-搭接网格技术;适于低速大迎角流动及重叠 搭接网格技术的湍流模型以及是否考虑内流的喷流边界条件的定义。在数值模拟方法研究基础上对矢量推力飞机喷流-外流干扰流场进行了分析研究。包括计及喷管内流的内外流干扰流场数值模拟;给定喷管出口边界条件的喷流-外流干扰流场数值模拟;复杂外形引入喷流边界的数值模拟。以上计算反映了喷流对不同外流情况时的流扬的影响和气动力的影响。数值模拟说明，采用重叠-搭接混合网格处理复杂外形，使用恰当的湍流模型可以较好地模拟喷流-外流的干扰流场。

Numerical Simulation of External Flow Interfered by Jet Flow

A numerical method is discussed for the simulation of the external flow field interfered by the trust vectoring flow.Three contents are included which are: the combination of chimera grid technique and matching grid technique,the turbulence model which is suitable for the flow field with complicated configuration,and the boundary condition of jet flow with or without inner flow.The numerical method was used for the simulation of the flow filed of three models: the interfered flow filed with inner flow,the interfered flow field with a jet flow boundary only,and the aircraft flow field with the interference of jet flow.The external flow fields and aerodynamic forces of different confi-gurations interfered by the jet flow are calculated.It is confirmed that using combined grids and proper turbulence model,the complicated flow fields of external flow with jet flow can be analyses.