侧滑角对超空泡航行体转弯运动沾湿区域的影响

Influence of sideslip angle on wetted area in turning motion of a supercavitating vehicle

为了提高通气超空泡航行体在转弯运动过程中空泡和航行体的运动一致性,基于有限体积法和VOF多相流模型,采用动态网格技术对航行体转弯运动的空泡形态特性进行了非定常数值模拟研究。通过对航行体沾湿区域的分析,揭示了沾湿区域形成的原因,利用空化器对空泡轴线的定向效应,提出了合理改变侧滑角减缓沾湿区域出现的具体方法。通过分析侧滑角和侧滑角速度对航行体沾湿区域的影响,提出了超空泡航行体转弯运动过程中,在给定偏航角条件下避免出现沾湿区域的侧滑角和侧滑角速度的适用范围,为进一步研究超空泡航行体机动运动问题提供参考。

To improve the consistency of the motion of a cavity and a vehicle during the turning motion of a ventilated supercavitating vehicle,the unsteady numerical simulation of the cavity morphology characteristics of the vehicle in the turning motion was carried out based on the finite volume method and the VOF multiphase flow model by using the dynamic grid technique.Based on the analysis of the wetted area of the vehicle,the reasons for the formation of the wetted area were revealed.The specific method of changing the side slip angle reasonably to slow down the occurrence of the wetted area was put forward by utilizing the orientation effect of the cavitator on the axis of the cavity.By analyzing the influence of sideslip angle and sideslip angular velocity on the wetted area of the vehicle,the application scope of sideslip angle and sideslip angular velocity to avoid the wetted area in the course of turning motion of supercavitating vehicle at given yaw angle was proposed,which provides a method reference for further research on the maneuvering motion of supercavitating vehicles.