内埋武器发射参数对下落轨迹的影响

采用改进的延迟分离涡模拟方法结合动网格技术，对某一简化内埋弹舱-舱门-弹体模型的三维流场进行非定常计算，得到了不同来流马赫数、弹体发射速度和初始角速度等参数对弹体下落轨迹的影响规律。结果表明:亚声速条件下来流马赫数对弹体偏航角度影响较小，跨声速及超声速条件下受流场波系的影响，弹体均向右偏航。超声速条件下，随马赫数增加弹体偏航角和俯仰角的变化幅度减小。提升弹体初始发射速度可以使弹体快速达到安全分离距离，并减小姿态角变化。增加弹体初始低头角速度可以在不增加弹射力的情况下，减小弹体俯仰角度，提高弹体分离速度，有利于机弹安全分离。

EFFECTS OF LAUNCHING PARAMETERS ON THE SEPARATION TRAJECTORY OF INTERNAL WEAPONS

A simplified buried weapon bay-door-missile model was simulated with Improved Delayed Detach Eddy Simulation (IDDES) method and dynamic grid technique under the condition of different inflow Mach numbers, launching speeds and initial angular velocities. The separation trajectory varying patterns of different cases were obtained. The results show that, in subsonic flow, the Mach number has little effect on the yaw angle, while under transonic and supersonic conditions, the missile yaws to the right due to the influence of shock waves. The increase in the Mach number leads to the reduction of missile yaw and pitch angle for supersonic inflow. Raising the launching speed can make the store reach safe separation distance faster and diminish store angular variation. Increasing the initial angular velocity of the missile can reduce the pitch angle and increase the separation speed of the missile without changing the ejection force.