<abstract xmlns="http://www.w3.org/1999/xhtml"><p><italic>The article presents the numerical method for prediction of tip vortex cavitation generated on hydrofoils.</italic><italic>This method has been developed in the course of numerical and experimental research described in earlier</italic><italic>publications. The objective of the research was to design the optimum discrete grid structure for this specific</italic><italic>computational task and to select the best turbulence model for such an application The article includes</italic><italic>a short description of the method and a computational example demonstrating its performance. In this</italic><italic>example the results of numerical prediction of the cavitating tip vortex obtained from two commercial CFD</italic><italic>codes are compared with experimental photographs taken in the cavitation tunnel in the corresponding</italic><italic>flow conditions. Altogether nine different flow conditions are tested and analyzed, but only selected results</italic><italic>are included. The accuracy of the numerical predictions is discussed and the reasons for minor existing</italic><italic>discrepancies are identified. The unsteady tip vortex calculations are also presented, showing the fluctuations</italic><italic>of the transverse velocity components predicted for three cross-sections of the cavitating vortex kernel.</italic></p></abstract>

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 earlierpublications. The objective of the research was to design the optimum discrete grid structure for this specificcomputational task and to select the best turbulence model for such an application The article includesa short description of the method and a computational example demonstrating its performance. In thisexample the results of numerical prediction of the cavitating tip vortex obtained from two commercial CFDcodes are compared with experimental photographs taken in the cavitation tunnel in the correspondingflow conditions. Altogether nine different flow conditions are tested and analyzed, but only selected resultsare included. The accuracy of the numerical predictions is discussed and the reasons for minor existingdiscrepancies are identified. The unsteady tip vortex calculations are also presented, showing the fluctuationsof the transverse velocity components predicted for three cross-sections of the cavitating vortex kernel.

Numerical prediction of steady and unsteady tip vortex cavitation on hydrofoils

Polish Maritime Research

{"article-title":"Numerical prediction of steady and unsteady tip vortex cavitation on hydrofoils"}

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 prediction of steady and unsteady tip vortex cavitation on hydrofoils

Publié en ligne: 31 oct. 2012

Pages: 3 - 15

DOI: https://doi.org/10.2478/v10012-012-0026-2

Mots clés
rotary hydraulic machinery, vortex cavitation, numerical methods

This content is open access.

Numerical prediction of steady and unsteady tip vortex cavitation on hydrofoils

Publié en ligne: 31 oct. 2012

Pages: 3 - 15

DOI: https://doi.org/10.2478/v10012-012-0026-2

Mots clésrotary hydraulic machinery, vortex cavitation, numerical methods

This content is open access.

Mots clés
rotary hydraulic machinery, vortex cavitation, numerical methods