The Hydrodynamic Challenge of Initial to Sheet/Cloud Cavitating Flow Around ClarkY11.7% Hydrofoil Using Recent Turbulence and Cavitation Models

It is crucial to predict accurately the onset of cavitation and somewhat after that as one of the fluid flow hydrodynamics limitations. In the present study, four cavitation models inclusive of Singhal, Zwart, Kunz, Sauer, and also three recent improved RANS turbulence models including k-kl-omega, SST k-omega, and SST transition are examined for initial to cloud cavitation flows. Hence, the cavitating flow over a two-dimensional ClarkY11.7% hydrofoil at angles of attack 8 and 10 degrees and Reynolds number of 8 x 10(5) is numerically studied by means of ANSYS-Fluent, and the results are compared against experimental data in a range of cavitation numbers of (0.8-4). It has been tried a great deal, to increase the accuracy of all implemented methods and techniques. Comparisons show that the numerical predictions could be improved considerably. In particular, we report that using the combination of Zwart cavitation and transient k - kl - omega turbulence models leads to much better agreement with experimental results for these conditions of flow. Further, the unsteady flow dynamics and pressure variations of different points on the hydrofoil against time have been illustrated.