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数值模拟了来流马赫数为5时的圆球绕流冷流场,以及来流与头部驻点附近注入激光能量而产生的等离子体相互耦合形成的流场的演化过程。计算结果表明:施加局部能量点源能够改变原有的弓形激波结构,使其变为斜激波,从而减小气动阻力;气动阻力随入射激光能量的增大而逐渐减小,当入射激光能量为1.1 J时,气动阻力减小的百分比高达40%。
The evolution of the flow field formed by the flow around the flow field and the plasma generated by the laser energy injected near the head stagnation point is numerically simulated. The results show that the local energy point source can change the original bow shock structure and make it become a diagonal shock wave to reduce the aerodynamic drag. The aerodynamic drag decreases with the increase of the incident laser energy. When the incident laser beam At 1.1 J, the aerodynamic drag is reduced by as much as 40%.