通气超空泡水下射弹数值模拟及试验研究

基于均质平衡流理论,利用流场分析软件Fluent 6.3对通气超空泡水下射弹进行了数值模拟,并利用射弹装置开展了试验研究.在初速为50 m/s和70 m/s两种情况下得到了射弹的通气超空泡,此时,随空化数减小,射弹形成超空泡需要更多的通气量,通气超空泡尾部不闭合；形成通气超空泡后,射弹阻力系数大幅度减小,并且不同速度的...

Numerical Simulation and Experimental Study of Ventilated Supercavity of Underwater Projectile

Fluent 6.3 was applied to simulate the ventilated supercavity of underwater projectile based on the homogeneous equilibrium flow theory.The experiments of underwater ventilated projectile were made by using the projectile device,and the ventilated supercavities of underwater projectile were obtained at 50 m/s and 70 m/s.More ventilation is needed to form the supercavity with the decrease in the cavitation number,and the tail of ventilated supercavity is not closed.The drag coefficient decreases greatly after a supercavity forms,and the drag coefficients nearly remain the same at different velocity.Compared with unventilated projectile,the ventilated supercavitation projectile have small velocity decay rate and longer displacement under the condition of the same muzzle velocity.