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用悬停自由尾流模型计算悬停旋翼的流场,用工程算法计算机载火箭的气动特性,将旋翼流场影响下的弹道计算与气动力计算相结合,对武装直升机挂装火箭的气动特性及弹道特性进行了计算分析。结果表明:武装直升机的气动特性对挂装武器的弹道特性有显著影响,影响主要在旋翼尾流区,在该区内旋翼尾流对火箭的法向力系数、侧向力系数和滚转力矩系数的影响尤甚。
The hovering free wake model was used to calculate the flow field of the hovering rotor. The aerodynamic characteristics of the rocket mounted on the helicopter were calculated by engineering algorithms. The ballistic computation and aerodynamic calculation under the influence of rotor flow field were combined. And trajectory characteristics were calculated and analyzed. The results show that the aerodynamic characteristics of helicopter gunships have a significant impact on the ballistic characteristics of the mounted weapons, mainly in the rotor wake region where the rotor wake influences the normal force coefficient, lateral force coefficient and roll torque The impact of the coefficient is even worse.