Effects of periodic gust flow on super-cavitation morphology and hydrodynamic characteristics of a ventilated vehicle

被引：0
|
作者：
Wang W. [1 ]
Wang C. [1 ]
Li C. [1 ]
Du Y. [1 ]
机构：
[1] School of Astronautics, Harbin Institute of Technology, Harbin
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2019年 / 38卷 / 13期
关键词：
Gust flow; Hydrodynamic; Ventilated super-cavitation; Wetted area;
D O I：
10.13465/j.cnki.jvs.2019.13.029
中图分类号：
学科分类号：
摘要：
Effects of periodic gust flow on super-cavitation morphology and hydrodynamic characteristics of ventilated vehicle were numerically simulated with the dynamic grid technique. Firstly, comparing the numerical computation results with test data, the feasibility of the dynamic grid technique being used to simulate periodic gust flow was verified. Then, based on this simulation method, the super-cavitation morphology evolution process and hydrodynamic change features of a ventilated vehicle under the action of periodic gust flow were investigated. The results showed that under the action of periodic gust flow, super-cavitation morphology of the ventilated vehicle reveals a periodic change, size and position of wetted area of the vehicle also change to cause periodic change of hydrodynamic coefficient; the proportion of the vehicle's wetted area resistance in total resistance increases with increase in wetted area; the proportion of wetting area lift in total lift is larger, there is a high pressure zone near cavitation closing line of wetted area to make small wetted area provide a very big lift for vehicle. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：208 / 214
页数：6
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