To investigate the supercavity geometry and gas flow structure for the supercavities with two closure types under the different flow conditions, an inhomogeneous multiphase model with the SST turbulence model was established, and validated by experimental results. The results show that two distinct regions exist inside the supercavity, which include the downstream flow region along the gas-water interface and the reverse flow region. For the twin-vortex supercavity, the internal gas leaks from the supercavity boundary by two paths: the supercavity surface and the two-vortex tubes. Increasing Froude number leads to more internal gas stripped from the supercavity surface. Two types of gas loss exist for the re-entrant jet supercavity with high Froude number, one type is the steady process of gas loss, and the major gas-leaking path is the supercavity surface rather than supercavity closure region. The other type is the unsteady periodic ejection, and the gas cluster of periodic ejection is merely a small part of the gas stored inside the supercavity.

为了研究不同流动条件下具有两种闭合类型的超腔的超腔几何和气体流动结构，建立了具有 SST 湍流模型的非均匀多相模型，并通过实验结果进行了验证。结果表明，超空腔内存在两个不同的区域，包括沿气水界面的下游流动区域和逆向流动区域。对于双涡超腔，内部气体通过两个路径从超腔边界泄漏：超腔表面和双涡管。增加弗劳德数会导致更多的内部气体从超腔表面剥离。高弗劳德数折返射流超腔存在两种气体损失类型，一种是气体损失的稳态过程，主要的气体泄漏路径是超腔体表面而不是超腔体闭合区域。另一种是非定常周期抛射，周期抛射的气体团簇只是储存在超腔内的气体的一小部分。