炸弹投放模型的建立与数值模拟  

Establishment and Numerical Simulation of Model for Bomb Launching

作　　者：陈少君[1,2] 刘占辰[1] 封普文[1] 崔志光[1] 

机构地区：[1]空军工程大学航空航天工程学院 [2]中国人民解放军69008部队

出　　处：《电光与控制》2012年第7期37-40,56,共5页Electronics Optics & Control

摘　　要：数值模拟方法是研究机弹分离问题的一种高效且经济的手段,它为研究炸弹与载机的安全分离、气动干扰等问题提供了参考依据。应用计算流体动力学软件FLUENT的二次开发功能和RNG k-ε湍流模型建立了投弹流场数值模拟和弹道仿真相结合的炸弹投放仿真模型;运用动网格技术更新投放物与载机发生相对运动而导致的计算域变化;将整个流场的解与六自由度运动方程的解进行耦合,模拟计算了炸弹与载机分离的过程;得到了在气动干扰下炸弹姿态角和位置随时间变化图。结果表明,在超音速条件下气动干扰对投弹的纵向运动影响非常严重,而横侧向运动受气动干扰影响不大。Numerical simulation is an efficient and economical means for studying bomb separation from aircraft, which may supply a reference for studying the safe separating of bombs from bomber and the aerodynamic interference. The combination model of numerical simulation and trajectory simulation of stores separated from bomber was established by the re-development technologies of the CFD software（FLUENT）and the RNG k-6 turbulence model. The changed flow field caused by the relative motion between the store and bomber was updated by the method of dynamic mesh. The process of a bomb separated from the bomber was simulated, coupling the solution of whole field and the solution of 6-DOF equations. The picture of displacement-time and attitude angle-time were obtained under aerodynamic interference. The result showed that the aerodynamic interference has severe effect on the store＇s longitudinal motion rather than transverse motion.

关 键 词：外挂物投放 数值模拟 动网格 气动干扰 湍流模型 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]