Numerical prediction of steady and unsteady tip vortex cavitation on hydrofoils

• Autorzy: Flaszynski P. , Szantyr J.A. , Tesch K.
• Języki publikacji: EN

Abstrakty

EN

The article presents the numerical method for prediction of tip vortex cavitation generated on hydrofoils. This method has been developed in the course of numerical and experimental research described in earlier publications. The objective of the research was to design the optimum discrete grid structure for this specific computational task and to select the best turbulence model for such an application The article includes a short description of the method and a computational example demonstrating its performance. In this example the results of numerical prediction of the cavitating tip vortex obtained from two commercial CFD codes are compared with experimental photographs taken in the cavitation tunnel in the corresponding flow conditions. Altogether nine different flow conditions are tested and analyzed, but only selected results are included. The accuracy of the numerical predictions is discussed and the reasons for minor existing discrepancies are identified. The unsteady tip vortex calculations are also presented, showing the fluctuations of the transverse velocity components predicted for three cross-sections of the cavitating vortex kernel

• Wydawca: -
• Czasopismo: Polish Maritime Research
• Rocznik: 2012
• Tom: 19
• Numer: 3
• Opis fizyczny: p.3-15,fig.,ref.

Twórcy

autor

Flaszynski P.

• Faculty of Mechanical Engineering, Gdansk University of Technology, Narutowicza 11/12, 80-952 Gdansk, Poland

autor

Szantyr J.A.

• Faculty of Mechanical Engineering, Gdansk University of Technology, Narutowicza 11/12, 80-952 Gdansk, Poland

autor

Tesch K.

• Faculty of Mechanical Engineering, Gdansk University of Technology, Narutowicza 11/12, 80-952 Gdansk, Poland

Bibliografia

• 1. Ansys/Fluent Release 12.0 Users Manual, 2009
• 2. Flaszyński P., Szantyr J., Dymarski P., Kraskowski M.: Numerical Prediction of Vortex Generated by Hydrofoil, Proc. Intern. Symposium on Marine Propellers, Trondheim, Norway, June 22-24, 2009
• 3. Flaszyński P., Szantyr J., Biernacki R., Dymarski P., Kraskowski M.: A Method for the Accurate Numerical Prediction of the Tip Vortices Shed from Hydrofoils, Polish Maritime Research No. 2(65), Vol. 17, 2010, pp. 10-17
• 4. Szantyr J.A., Flaszyński P.,Tesch K., Suchecki W., Alabrudziński S.: An Experimental and Numerical Study of Tip Vortex Cavitation, Polish Maritime Research No. 4(71), Vol. 18, 2011, pp. 14-22
• 5. Szantyr J.A., Biernacki R., Flaszyński P., Dymarski P., Kraskowski M.: An Experimental and Numerical Study of the Vortices Generated by Hydrofoils, Polish Maritime Research No. 3(61), Vol. 16, 2009, pp. 11-17]
• 6. Yakhot V., Orszag S.A., Renormalization Group of Turbulence: I. Basic Theory, Journal of Scientific Computing, 1(1):1-51, 1986
• 7. Zwart P.J., Gerber A.G., Belamri T., A Two-Phase Flow Model for Predicting Cavitation Dynamics, Fifth International Conference on Multiphase Flow, Yokohama, Japan, 2004

Identyfikatory

DOI

10.2478/v10012-012-0026-2