The cavity mixed with air will collapse during water exit, which leads to the dramatic change of flow field. The cavity collapse property has been analyzed using spherical air-involved bubble model. Then, based on homogenous multiphase flow model, numerical simulation of the cavity collapse filled with air has been conducted. The result shows that the rebound phenomenon will occur in the cavity water exit collapse process, and causing strong impact on vehicle surface. The analysis also presents that cavity inside pressure rising causes the growing of cavity size and reduces the inside and outside pressure difference, which eases the water impact.
Key words
cavity /
water exit /
multiphase flow /
underwater vehicle
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References
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