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采用数值模拟方法对潜射导弹垂直发射上升过程重力场中非定常空泡流进行了研究。使用动网格技术,结合求解考虑质量输运空化模型的混合介质RANS方程,实现了弹体边界运动与汽水流场的流-固耦合问题求解,并将仿真结果与实验数据进行对比分析,二者具有较好的一致性,验证了数值求解方法的正确性和有效性。以此为基础,数值模拟了重力影响下的潜射导弹垂直发射水下运动过程,给出了导弹阻力系数与空化数之间的关系,分析了肩空泡对导弹的流体动力和出水速度的影响。
The numerical simulation method was used to study the unsteady cavitation flow in the gravitational field during vertical launching of submarine-launched missiles. The dynamic mesh technique is used to solve the fluid-solid coupling problem of the missile boundary motion and the flow field of solid-liquid flow, and the simulation results are contrasted with the experimental data by combining the RANS equation of mixed media considering the mass transport cavitation model. The two are in good agreement and verify the correctness and validity of the numerical method. Based on this, the vertical submarine launching process of submarine-launched missiles under the influence of gravity is numerically simulated. The relationship between missile drag coefficient and cavitation number is given. The hydrodynamic force and velocity of shoulder cavitations on missile are analyzed. Impact.