应用计算流体力学的理论方法,对某型电跨音速大攻角电视制导炸弹绕流流场及其空气动力特性展开数值分析。其中,控制方程为雷诺平均的可压缩Navier-Stokes方程,湍流模型采用标准k-ε两方程模型,数值格式为二阶迎风格式。利用Gambit 2.2软件对电视制导炸弹及其绕流流场进行三维建模,使用Fluent 6.2软件对电视制导炸弹在亚、跨、超音速以及不同攻角条件下的三维流场进行数值模拟,得到相应的压力分布图、温度分布图、马赫数分布图,以及电视制导炸弹的阻力系数曲线和升力系数曲线。分析绕流流场结构规律,为进一步的等离子体激励改善电视制导炸弹气动特性设计提供参考和依据。

The theory and technique of Computational Fluid Dynamics(CFD)were applied to analyze the flow field of a transonic big-attack-angle TV-guided bomb and its aerodynamic characteristics.The governing equations of the simulation were the Reynolels-averaged Navier-Stokes equations and k-ε model was adopted for turbulence flow.The numerical scheme was second order windward scheme.Three-dimensional models of the bomb and its flow field were established by Gambit 2.2 software.Using Fluent 6.2 software,the flow field of this bomb was simulated at different speeds and different attack angles.The pressure distribution,temperature distribution,Mach number distribution,and the drag coefficient and the lift coefficient curves were obtained through numerical simulation.The structure characteristics of flow field were analyzed,and the result was of important reference value for more design about plasma improving the bombs aerodynamic characteristic.