计算力学学报2012，Vol.29Issue(6)：983-988,6.
超空泡航行器升沉运动流体动力特性研究
Research on hydrodynamic characteristic of super-cavitating vehicle in heave state
张纪华 1张宇文 2张博2
作者信息
- 1. 北京机电工程研究所,北京100074
- 2. 西北工业大学航海学院,西安710072
- 折叠
摘要
Abstract
Based on the Rayleigh-Plesset homogeneous hypothesis and the compressible Mixture multi phase model,numerical simulation of cavitation flow in the simple harmonic heave state of super-cavitat ing vehicle enveloped with cavity was performed in moving coordinate system. The law of changes of the vehicle's hydrodynamic characteristic was analysed. Also,a comparative study of influence of heave fre- quency and amplitude on the vehicle's hydrodynamic force coefficients was carried out. In heave state, the trajectory of vehicle's autonomic movement was simulated. Results have showed that in the simple harmonic heave state,the vehicl&s hydrodynamic force coefficients change periodically. The increment of heave frequency and amplitude will cause drag force and lift force to increase, and intensify the amplitude fluctuation of drag coefficient and lift coefficient. The velocity and angle velocity are in periodic oscilla tion with the vehicle's heave. The conclusion of this paper can afford theory basis for the further study on dynamic modeling,added mass caculation and trajectory design and of super-cavitating vehicle.关键词
超空泡/升沉运动/频率/幅值/流体动力系数Key words
super-cavitation/heave/frequency/amplitude/hydrodynamic force coefficient分类
数理科学引用本文复制引用
张纪华,张宇文,张博..超空泡航行器升沉运动流体动力特性研究[J].计算力学学报,2012,29(6):983-988,6.
