Numerical simulation for rotating motion of a natural super-cavitating vehicle

被引：0
|
作者：
Wang R. [1 ]
Liu C. [2 ]
Zhao S. [2 ]
Qi X. [1 ]
机构：
[1] Northwest Institute of Mechanical and Electrical Engineering, Xianyang
[2] China Ship Development and Design Center, Wuhan
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2020年 / 39卷 / 21期
关键词：
Cavitation internal pressure; Centrifugal force; Numerical simulation; Rotating motion;
D O I：
10.13465/j.cnki.jvs.2020.21.009
中图分类号：
学科分类号：
摘要：
Here, numerical simulation was performed for cavitation shape and hydrodynamic characteristics of a natural super-cavitating vehicle in its maneuver process. Based on Logvinovich's principle of independent expansion, the theoretical model of its rotating motion under action of centrifugal force and the 3-D numerical calculation model for solving rotating motion of the super-cavitating vehicle were established. By comparing calculation results of these two models, the effectiveness of the numerical simulation method was verified. The numerical simulation method was used to study influence laws of centrifugal force's "straightening" action on hydrodynamic characteristics of the vehicle in cavitation, and analyze pressure distribution characteristics on the surface of the vehicle at different rotating angular velocities. Results showed that with increase in rotating angular velocity, cavitation axis's external displacement increases, the centrifugal force's straightening cavitation action becomes stronger to have greater influence on development of cavitation on both sides of the vehicle's rotation radius; lift coefficient and moment coefficient present a sinusoidal distribution; when rotating angular velocity is less than 1 rad /s, the generated pitching moment has a "head up" effect on the vehicle; when rotating angular velocity is larger than 1 rad /s, the generated pitching moment has a "head down" effect on the vehicle. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：65 / 70
页数：5
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