运用Fluent软件对火箭深弹的超空泡现象进行了数值模拟分析。基于结构化网格,运用k-ε湍流模型模拟火箭深弹在水下的运动过程,研究空化器规格、锥角及通气量等参数对其超空泡成型的影响。结果表明,火箭深弹形成临界超空泡时,速度越大,所需通气量越大;速度相同时,空化器直径越大,其形成临界超空泡时所需通气量越小。对比两种空化器形成的超空泡形态,应用圆盘倒截锥空化器更易控制超空泡的成型。数值计算结果与试验结果基本吻合。

The supercavity phenomena on rocket depth was simulated with computational fluid dynamics software Fluent. Based on the structured grid, the k-ε turbulence model was used to simulate the formation of supercavity on the rocket depth charge changes with the cavitator parameters such as cavitator specifications, cone angle, ventilation and so on. The simulation results show that when the rocket depth charge forms the critical supercavity, the faster its speed is, the more the ventilation is required; at the same speed, when the rocket depth charge forms the critical supercavity, the larger cavitator diameter is, the less the ventilation is required. Comparing the supercavity shapes of two kinds of cavitator, the rocket depth charge equipped by conical disc cavitator forms the supercavity easily. Comparing the simulation results with the experiment results, they are basically consistent.