潜射导弹大攻角空化流动特性计算研究

潜射导弹水下高速运动时,弹体表面的空化现象对导弹的受力及力学环境有重要影响。通过数值模拟,对大攻角情况下空化流动的特性进行研究,计算结果与试验值吻合较好,验证了数值算法的准确性。得到弹体表面的压力分布情况,获取了不同攻角下空泡的不同形态,分析了不同攻角、空泡数对弹体受力的影响。

Numerical Simulation on Cavitation of Submarine Launched Missile's Surface at Large Angles of Attack

Cavitation on the missile's surface has great effect on the forces and mechanical environment of submarine launched missile moving underwater with a high speed.The numerical computations for cavitation at large angles of attack are made.And its precision is demonstrated with the comparisons between the calculation results and experiments.The distribution of pressure on surface and the shape of cavitation at different attack angles is obtained.The influence of attack angle and cavitation number on the hydrodynamic force is given.