舱门对内埋武器分离特性影响分析

为了研究是否考虑舱门及舱门不同开启姿态对内埋武器分离特性的影响，利用基于Menter剪应力输运k-ω湍流模型的分离涡模拟方法，结合6自由度刚体动力学方程和重叠网格技术，对超声速来流条件下某一简化内埋弹舱-舱门-弹体模型的三维流场进行了非定常计算，得到了不同条件下的弹体下落轨迹。结果表明：超声速来流条件下，流场中存在激波相交、激波剪切层反射等复杂流动现象，考虑舱门影响会使流场波系结构发生变化，弹体下落轨迹随之改变；弹体抬头角由0.5°增加到6.5°，弹体右偏航角由0.3°增加到2.5°，下落后期弹体下落速度增速减缓；舱门不同开启姿态对弹体竖直方向位移及俯仰运动影响较小，但会对弹体偏航产生较大影响；尽可能使舱门远离弹体可以有效地降低舱门对弹体偏航的影响，减小偏航角度，提高武器分离品质。

Effect of Bay Door on Separation Characteristics of Internal Store

To study the effects of bay door and door opening states on the separation characteristics of internal store,a simplified buried weapon bay-door-missile model is simulated using SST k-ω IDDES method,six degrees of freedom rigid body dynamics equations and overset mesh method under the condition of supersonic inflow.The separation trajectories of missile bodies in different cases were obtained.The results show that,in supersonic flow,shock intersection and shock shear layer reflection are present in the flow field.Considering that the bay door may make the wave structure changed,the trajectory of missile is also changed.The upward pitch angle of missile increases from 0.5° to 6.5°,the right yaw angle of missile increases from 0.3° to 2.5°,and the growth rate of falling speed decreases in later period.Change in door opening state has little impact on dropping displacement and pitch angle,but has greater impact on the yaw angle of missile.It shows that keeping the door away from missile as far as possible can effectively reduce the influence of the door,decrease the yaw angle and improve the separation quality.