Numerical Simulation of High-Speed Submerged Water Jet with Cavitation.

Abstract

A numerical analysis was carried out to clarify the unsteady behavior and the large-scale structure of high-speed submerged water jet with cavitation. A finite volume formulation with an upwind scheme was used to discretize the compressible Navier-Stokes equations with an assumption of locally homogeneous model of gas-liquid two-phase media. First, the validation of the present numerical method was discussed by comparing numerical results with experiments of jet flow. Further, the difference between the jet structures with and without cavitation was investigated. As a result, it is indicated that the cavitating jet flow corresponds basically to an unsteady transonic flow condition. Also, it is found that the present numerical method is available to predict the complex structure and the unsteady behavior of the cavitating jet flow.