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| Research on hydrodynamic characteristic of super-cavitating vehicle in heave state |
| Received:September 03, 2011 Revised:November 28, 2011 |
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| DOI：10.7511/jslx20126028 |
| KeyWord:super-cavitation heave frequency amplitude hydrodynamic force coefficient |
| Author | Institution |
| 张纪华 |
北京机电工程研究所,北京 |
| 张宇文 |
西北工业大学 航海学院,西安 |
| 张博 |
西北工业大学 航海学院,西安 |
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| Abstract: |
| Based on the Rayleigh-Plesset homogeneous hypothesis and the compressible Mixture multiphase model,numerical simulation of cavitation flow in the simple harmonic heave state of super-cavitating 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 frequency 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 vehicle’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 oscillation 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. |
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