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运用Zwart-Gerber-Belamri空化模型,采用动网格和复合网格技术,提出复杂外形潜射导弹出水过程中空化流数值计算方法。对头肩部、舵面及突起物的空化生成、演化及影响因素进行分析。仿真结果表明:出水过程初期空化数降低使附体空泡迅速扩大,随后对空泡脱落与振荡的影响将更为显著;肩部以15 m/s的速度出水时产生空化并随速度上升而迅速增长,5°~10°攻角时肩空化非对称性显现;舵面空化受出水速度影响较小,攻角小于等于5°时空化面积小于全舵面积的10%,但攻角大于5°后空化面积迅速增长至50%以上;减小突起物尺寸有利于避免空化产生,突起物空化受攻角影响较小,但在高速下可诱导临近弹体产生空化。
Based on the Zwart-Gerber-Belamri cavitation model and the moving grid and composite grid technology, numerical calculation method of cavitation flow in submarine-launched missile with complex appearance is proposed. The formation, evolution and influencing factors of cavitation of head and shoulders, rudder surfaces and protrusions were analyzed. The simulation results show that the cavitation rate increases rapidly in the early stage of effluent, and then the cavitation bubble will be more significantly affected. The shoulder cavitates with the velocity of 15 m / s, , The cavitation of the rudder surface is less affected by the velocity of the water. When the angle of attack is less than or equal to 5 °, the cavitation area is less than 10% of the area of the entire rudder surface. However, The cavitation area rapidly increases to more than 50% when the angle of attack is greater than 5 °. Reducing the size of the protrusions helps to avoid cavitation, and the cavitation of the protrusions is less affected by the angle of attack. However, The