The understanding of the internal gaseous flow of artificially ventilated supercavities is developed using a locally homogenous, multiphase computational fluid dynamics model that is benchmarked using experimental data. The solutions indicate that gas leakage from a ventilated supercavity originates from the gaseous shear layers forming at the gas-water interface. Not only do these observations corroborate previous theory developed for cavities with toroidal closure, they also display evidence that shear-layer mechanisms remain important for cavities in the twin-vortex regime and when interacting with bodies. It is also found that the treatment of turbulence in these shear layers affects the outcome of computational fluid dynamics approaches. Lastly, a semi-empirical model considering these shear layers is proposed. Results from the model indicate an improved prediction capability of the relationship between cavity size and ventilation rate for steady, twin-vortex supercavities.

使用局部均质的多相计算流体动力学模型开发了对人工通风的超腔内部气流的理解，该模型使用实验数据作为基准。这些解决方案表明，从通风的超腔体泄漏的气体源于在气-水界面处形成的气态剪切层。这些观察结果不仅证实了以前为环形封闭腔开发的理论，而且还显示了剪切层机制对双涡流腔以及与物体相互作用时腔仍然很重要的证据。还发现在这些剪切层中湍流的处理影响计算流体动力学方法的结果。最后，提出了考虑这些剪切层的半经验模型。