【摘要】 为给高空高速无人机内埋武器分离方式的选择提供权衡依据,建立了弹舱及弹体模型,采用chimera嵌套网格方法与Menter SST k-ω湍流模式,对舱内重力投放、舱内弹射投放及舱外重力投放三种内埋武器分离方式在高空高速条件下的内埋武器分离过程进行了仿真分析,对比了三种分离方式分离过程的流场特性与弹体运动参数。结果表明,在Ma=3.7,高度为2.5 km的条件下,舱内弹射投放与舱内重力投放能够使内埋武器安全分离,舱外重力投放在高空高速条件下无法完成内埋武器的安全分离,弹体无法快速下落并伴有大幅振荡,威胁无人机的飞行安全。更多还原

【Abstract】 Aimed at providing basis for choosing the separation modes of the internal weapon of a high-altitude and high-speed UAV,models for a cavity and a bomb is built,chimera grid and Menter SST turbulence model are utilized to simulate the separation process of the internal weapon at three different separation modes on high-altitude and high-speed condition,namely: inner free drop,outer free drop and inner ejection. Comparisons of the flow field characteristics and weapon motion parameters of the three separation modes are made. The results showed that on the condition of Ma = 3. 7 and an altitude of 25 km,both inner free drop and inner ejection are capable of safely separating the internal weapon,whereas,outer free drop is unable to ensure the safety separation of the internal weapon,the bomb falls slowly with significant pitching oscillation,which threatens the flight safety of the UAV.更多还原