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| Theoretical and Experimental Study of Added Mass
for Underwater Vehicles
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| ZHOU Yong,CHE Chidong |
| ZHOU Yong,CHE Chidong
(State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract Abstract： The model of an infinite long cylinder submerged in fluid, which vibrates vertically, was investigated in this paper. Based on the analysis of incompressible flow field in limited area, the influence of fluidwidth, fluiddepth and submerge enceratioon added mass was analyzed using numerical computation. Thus, based on Lewis’ method, a fast prediction formula for added mass of underwater vehicle was proposed. The results show that the rigid wall leads to an increase in added mass, but as the distance increases (usually 5 times the crosssectional radius), the effect of the wall can be neglected. However, the free surface may reduce the added mass, and the effect can be ignored when the distance between the cylinder and the free surface is up to 6 times the crosssectional radius. The velocity potential on the free surface can be considered as zero only when the cylinder is vibrating at a high frequency or is far away from the free surface.
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Received: 27 January 2015
Published: 29 February 2016
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