Characteristics of flow field around an underwater projectile with natural and ventilated cavitation |
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Authors: | Jian-hong Guo Chuan-jing Lu and Ying Chen |
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Institution: | School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China |
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Abstract: | The present simulation investigates the multiphase cavitating flow around an underwater projectile. Based on the homogeneous
equilibrium flow assumption, a mixture model is applied to simulate the multiphase cavitating flow including ventilated cavitation
caused by air injection as well as natural cavitation. The transport equation cavitating model and a local linear low-Reynolds-number
turbulence model are incorporated to the equation system. The calculations are executed based on a suite of computational
fluid dynamics code. The hydrodynamics characteristics of flow field under the interaction of natural cavitation and ventilated
cavitation are analyzed. The results indicate that the ventilated cavitation numbers and the drag coefficient are relative
to the natural cavitation numbers and gas flow rate in the multiphase cavitating flows. |
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