超空泡航行体三相流动演化特性

To investigate the evolution characteristics of a three-phase cavity flow induced by a ventilated submerged vehicle, we conducted a three-dimensional numerical simulation study on the complex process of replacing the natural cavity with ventilated supercavity of a vehicle using the commercial computational fluid dynamics software FLUENT. First, a three-phase cavity flow numerical calculation model was established to investigate the complicated flow around a ventilated vehicle based on the renormalization group k-ε turbulent model and the volume of fluid multiphase fluid model. This newly established numerical model was verified by comparing the numerical data of relevant experiments with published experimental data from sufficient convergence studies. Then, the complex three-flow process of transforming natural supercavity around a vehicle to ventilated supercavity was numerically simulated. Finally, the evolution law of the cavity shape and hydrodynamic characteristics of the vehicle from the natural supercavity to ventilated supercavity was given. This study innovatively shows a detailed three-phase evolution process of the cavity flow around a ventilated vehicle, which can provide references for cavity caries drug reduction.