2D and 3D Numerical Investigation of the Super Cavitation Phenomena in the case of Injection and No Injection of the Air and Water vapour on the Under Water Vehicle

In the present study, the super cavitation phenomenon with gas injection is investigated. The cavitation phenomena is one of the most complex problems of fluid dynamic. Cavitation usually creates problems in the some application and should be prevented. However, it is useful for some application. One of the advantages of the cavitation is drag reduction on the surface of underwater vehicles. However, it should be controlled. In the present study, the super cavitation phenomena is modeled and investigated using the RSM turbulence method. The main aim of the present study is to investigate the gas injection for stabilization this phenomena for drag reduction. Whereas the investigation on the exact dimension is a time consuming process, a scaled model was used for numerical modeling. The results shows that vapor injection don’t reduce the drag forces. However, the air injection by creation a thin layer of flow around the under vehicle reduces considerably the drag force.