大型捆绑助推器气动干扰流场数值模拟

Numerical Simulation of Three-dimensional Shock/Boundary Layer Interaction Between Core Stage and Booster

从三维薄层近似N -S方程出发 ,采用TVD差分格式 ,对某捆绑了 2个大型助推器的运载器 (RLV)流场进行了计算 ,得到了大型捆绑助推器真实复杂流场。数值结果表明在捆绑大型助推器后 ,在运载器头部附近产生了很强的弓形激波 ;数值结果也较好地反映了助推器的喷流与运载器芯级发动机的喷流相互干扰状况 ,为今后大型捆绑式可重复使用运载器的气动设计提供了理论依据和计算方法。

A three-dimensional TLA Navier-Stokes computational technique is applied to analyze the aerodynamic behavior of a rocket with two boosters. The model employs the turbulent model and relies on a TVD difference scheme. A large amount of data have been attained describing the aerodynamic behavior of the configuration. The data reflect the interaction of the plumes of the core stage and the booster. It's also shown that there is a strong normal shock before the rocket with big strap-on boosters.