Numerical analysis of cavitated flows in mixed-flow pump impellers

• Autorzy: Sedlar M. , Marsik F. , Safarik P.
• Konferencja: The Third International Conference on Transport Phenomena in Multiphase Systems (24-27 June, 2002; Kielce, Poland)
• Języki publikacji: EN

Abstrakty

EN

This paper deals with the flow model based on the Navier-Stokes computation and the simulation of bubble dynamics in the flow field, solving the Rayeigh-Plesset equation alongflow characteristics. No interaction between bubbles is considered. The initial bubble sizedistribution is based on a precribed distribution law and the initial void fraction. The flowpast the blades of mixed-flow pump impellers is investigated including the tip leakage flowsfor three different impeller configurations, aimed to predict the impeller configuration influence on cavitation phenomena, especially the blade surface regions endangered with the cavitation phenomena, especially the blade surface regions endangered with the cavitation erosion.

Słowa kluczowe

EN

RANS; FEM; buble dynamics; cavitation erosion; mixed-flow pump

• Wydawca: Wydawnictwo Politechniki Świętokrzyskiej
• Czasopismo: Zeszyty Naukowe Politechniki Świętokrzyskiej. Mechanika
• Rocznik: 2003
• Tom: Z. 77
• Strony: 57--64
• Opis fizyczny: Bibliogr .5 poz., rys.

Twórcy

autor

Sedlar M.

• SIGMA Research and Development Institute, Jana Sigmunda 79, 78350 Lutin, CZ.

autor

Marsik F.

• Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejskova5, 18200 Prague 8, CZ

autor

Safarik P.

• Czech Technical Iniversity, Faculty of Mechanical Engineering, Technicka 4, 16607 Prague 6, CZ.

Bibliografia

• 1. Sedlar M., Calculation of Quasi-Three-Dimensional Incompressible Viscous Flows by the Finite Element Method. Int. Journ. Num. Meth. Fluids. 16, 1993, pp. 953-966.
• 2. Sedlar M., Marsik F. and Safarik P., Modelling of Cavitated Flows in Hydraulic Machinery Using Viscous Flow Computation and Bubble Dynamics Model. Proc. Colloquium Fluid Dynamics 2000, Prague, 2000, pp. 107-110.
• 3. Zima P. and Marsik F., Nucleation and Dynamics of Bubbles in a Binary Water-Gas Solution. Proc. Engineering Mechanics 2000, Vol. IV, ITAM CAS, Prague, 2000, pp. 237-238.
• 4. Wang Y.Ch., Effect of Nuclei Size Distribution on the Dynamics of a Spherical Cloudof Cavitation Bubbles. Journ. Fluids Engng., 121, 1999, pp. 881-886.
• 5. Sedlar M., Marsik F. and Safarik P., Numerical Investigation of Blade and Tip Clearance Geometry Influence on Tip Clearance and Tip Vortex Cavitations. Proc.5th ISAIF, Vol. 1, Gdańsk, 2001, pp. 237-245.

Uwagi

This work has been supported by the Department of Industry and Trade of the Czech Republic under grant FB-C3/80/00 "Increase of Utility Value of Hydrodynamic Machines by Parameters Intensification and Introducing Advanced Technologies" and by the Grant Agency of CAS under grant S2076003 "Suppression of Onset and Effects of Cavitation in Hydrodynamic Machines".