2D楔型舵的空泡流场特性研究

水下航行体的航行性能直接受其操纵舵的影响，为确保航行体在全沾湿以及超空泡航行状态时均具有良好的稳定性，该文采用理论数值方法详细分析比较了2种典型楔型舵翼型在不同航行状态下的空泡形态及其升／阻力系数的变化规律，研究结果表明，随着来流攻角的增大，阻力系数呈现先减小后增大的趋势，且大空泡数条件下2种楔型舵的舵效相当，但有平行后体时的楔型舵在小空泡数条件下具有较高的舵效，需合理选择楔型舵以确保航行体具有稳定的航行性能。

Cavitating Flow Characteristics of 2D Wedge-shaped Fin

Flow characteristics of underwater vehicle are directly related to their control surfaces.In order to enhance the stability of a vehicle during its wetted and supercavitating stage,the cavity profiles and the lift/drag force acting on the fins are numerically analyzed under different flow regimes(e.g.different flow angles,with and without rear body,and cavitation number effects).The obtained results show that drag coefficient descends firstly and then ascends with the increased flow angle.The fin with rear body could provide higher efficiency at small cavitation number,while the fin with or without rear body provides similar performance as the cavitation number increases.These basic characteristics of different fins show the importance of reasonable shape to the stability of motion projectile.