Cavitation Flow Analysis of Axisymmetric Bodies Moving in the Water
This study aims to analyze the turbulent cavitating flow on the axisymmetric bodies moving in the water by using the incompressible two phase flow calculation. A program is developed with a pressure based SIMPLE algorithm and k-ε turbulent model implemented by wall function. A volume of fraction(VOF) method is used to capture the boundary between fluid and gas phase and the model for bubble production and depletion is also modeled and applied to represent the cavitation phenomena. SIMPLE algorithm is extended to simulate the compressible flow as well as two phase flow. Comparisons of calculation results show very good agreement with previous studies and verify the code validity. For a projectile with a hemispherical head form at the cavitation number(σ) of 0.4, the pressure coefficient Cp agrees pretty well with previous results by Shyy et al. Also another calculation with conical head form at σ=0.5 provides a good agreement with the results by Kunz et al. After the validation study, effect of cavitation on drag force is investigated. The drag force coefficient on the surface increases at the condition of cavitation.
KeywordsPressure Coefficient Cavitation Bubble Cavitation Number Axisymmetric Body Cavitation Model
Unable to display preview. Download preview PDF.
- 3.Vaidyanathan, R., Senocak, I., Wu, J., Shyy, W.: Sensitivity Evaluation of a Transport-based Turbulent Cavitation Model. AIAA-2002-3184 (2002)Google Scholar
- 4.Kunz, R.F., Boger, D.A., Stinebring, D.R., Chyczewski, T.S., Gibeling, H.J.: A Preconditioned Navier-Stokes Method for Two-Phase Flows with Application to Cavitation Prediction. AIAA-99-3329 (1999)Google Scholar
- 5.Kunz, R.F., Boger, D.A., Stinebring, D.R., Gibeling, H.J.: Multi-phase CFD Analysis of Natural and Ventilated Cavitation about Submerged Bodies. In: FEDSM99-7364, 3rd ASME/JSME Joint Fluids Engineering Conference (1999)Google Scholar
- 6.Kunz, R.F., Lindau, J.W., Gibeling, H.J., Mulherin, J.M., Bieryla, D.J., Reese, E.A.: Unsteady Three-Dimensional Multiphase CFD Analysis of Maneuvering High Speed Supercavitating Vehicles. AIAA 2003-841, 41st Aerospace Sciences Meeting and Exhibit (January 2003)Google Scholar
- 9.Owis, F.M., Nayfeh, A.H.: A compressible Multi-phase Flow Solver for the Computation of the Super-Cavitation over High-speed Torpedo. AIAA-2002-0875, 40th AIAA Aerospace Sciences Meetings & Exhibit (2002)Google Scholar
- 11.Rouse, H., McNown, J.S.: Cavitation and Pressure Distribution, Head Forms at Zero Angle of Yaw. Studies in Engineering, Bulletin 32, State University of Iowa (1948)Google Scholar