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对基于CFD复杂外形飞行器气动加热高效算法进行了研究。综合数值计算和工程计算,用CFD法求解欧拉方程,确定飞行器流场边界层外缘参数,再用经典参考焓方法计算表面热流。通过建立流场数据库,将该方法的适用范围从简单外形推广到复杂外形飞行器,从定常流场状态推广到沿弹道计算气动加热的时间历程。该法克服了纯工程算法难以求解复杂外形物面参数的缺点,且计算量明显小于纯数值算法,能很好地满足工程设计的需求。
The efficient aerodynamic heating algorithm based on CFD complex profile aircraft was studied. Based on the numerical calculation and the engineering calculation, the Euler equation is solved by the CFD method and the outer boundary layer boundary parameters of the aircraft flow field are determined. Then, the surface heat flow is calculated by the classical reference enthalpy method. By establishing a flow field database, this method is extended from the simple shape to the complex shape aircraft, and is extended from the steady flow field state to the aerodynamic heating time history along the trajectory. The method overcomes the shortcomings of pure engineering algorithm is difficult to solve the complex surface parameters, and the computational load is significantly less than the pure numerical algorithm, can well meet the needs of engineering design.