Numerical simulation of a cavitating propeller working in open water
Abstract
A viscous open water flow investigation around a four blade propeller model which equips the ONRT tumblehome is described in the present paper. The main purpose of the present study is that of establishing an appropriate method for computing the flow solution around a propeller working under the imminence of cavitation occurrence. The ISISCFD solver of FINETM/Marine software package is used to fulfill the task. The Reynoldsaveraged Navier-Stokes equations in which the turbulence is modeled with the EASM model are numerically solved by using a finite-volume based method. The performance diagrams of the propeller are computed for a range of advance coefficient between 0 and 1. Comparisons with the experimental data are provided to validate the numerical approach. A detailed analysis of the flow field structure as well as of the vortical character of the flow behind the propeller is provided. A special attention will be paid to the cavitation regime for which a particular model will be proposed.
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