A Scaled Underwater Launch System Accomplished by Stress Wave Propagation Technique
WEI Yan-Peng1**, WANG Yi-Wei1, FANG Xin2, HUANG Chen-Guang1, DUAN Zhu-Ping2
1Key Laboratory of Hydrodynamics and Ocean Engineering, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190 2The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190
A Scaled Underwater Launch System Accomplished by Stress Wave Propagation Technique
WEI Yan-Peng1**, WANG Yi-Wei1, FANG Xin2, HUANG Chen-Guang1, DUAN Zhu-Ping2
1Key Laboratory of Hydrodynamics and Ocean Engineering, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190 2The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190
摘要A scaled underwater launch system based on the stress wave theory and the slip Hopkinson pressure bar (SHPB) technique is developed to study the phenomenon of cavitations and other hydrodynamic features of high-speed submerged bodies. The present system can achieve a transient acceleration in the water instead of long-time acceleration outside the water. The projectile can obtain a maximum speed of 30 m/s in about 200 μs by the SHPB launcher. The cavitation characteristics in the stage of acceleration and deceleration are captured by the high-speed camera. The processes of cavitation inception, development and collapse are also simulated with the business software FLUENT, and the results are in good agreement with experiment. There is about 20–30% energy loss during the launching processes, the mechanism of energy loss is also preliminary investigated by measuring the energy of the incident bar and the projectile.
Abstract：A scaled underwater launch system based on the stress wave theory and the slip Hopkinson pressure bar (SHPB) technique is developed to study the phenomenon of cavitations and other hydrodynamic features of high-speed submerged bodies. The present system can achieve a transient acceleration in the water instead of long-time acceleration outside the water. The projectile can obtain a maximum speed of 30 m/s in about 200 μs by the SHPB launcher. The cavitation characteristics in the stage of acceleration and deceleration are captured by the high-speed camera. The processes of cavitation inception, development and collapse are also simulated with the business software FLUENT, and the results are in good agreement with experiment. There is about 20–30% energy loss during the launching processes, the mechanism of energy loss is also preliminary investigated by measuring the energy of the incident bar and the projectile.
[1] Batchelor G K and Moffatt H K 2001 Appl. Mech. Rev. 54 B89
[2] Zhang D, Liu Z P and Xiang Y P 2008 Int. J. Hydrogen. Energ. 33 7197
[3] Masri R and Durban D 2008 Int. J. Impact. Eng. 36 830
[4] LEI X W and ZHAO X Y 2009 Chin. Phys. Lett. 26 016401
[5] Wang Y C and Chen Y W 2007 Exp. Therm. Fluid. Sci. 32 403
[6] Park J T and Cutbirth J M 2003 J. Fluids Eng. 127 1210
[7] Leroux J B and Billard J Y 2004 J. Fluids Eng. 126 94
[8] Zhang X W and Wei Y J 2007 J. Hydrodyn. 19 564
[9] Cheng Y S and Liu H 2007 J. Hydrodyn. 19 403
[10] Ogawa K 2007 Int. J. Mod. Phys. B 22 1269
[11] Liu K X and Li X D 2006 Chin. Phys. Lett. 23 3045
[12] Singhal A K and Athavale M M 2001 J. Fluids Eng. 124 617
2011, Vol. 28 
