Critical Cavitation Number Determination of a High-speed Centrifugal Pump by Numerical Simulation of a Two-phase Flow

Cheraqi, Ali; Ebrahimi, Reza

doi:10.22034/jast.2021.299823.1090

Critical Cavitation Number Determination of a High-speed Centrifugal Pump by Numerical Simulation of a Two-phase Flow

Document Type : Original Article

Authors

Ali Cheraqi

Reza Ebrahimi

- Combustion and Propulsion Research Laboratory, Faculty of Aerospace Engineering, K.N.Toosi University of Technology, Tehran

10.22034/jast.2021.299823.1090

Abstract

This paper aims to present an investigation on determining the critical cavitation number of a high-speed centrifugal pump by computational fluid dynamics. In doing so, characteristic curves of the pump used in this study were obtained in the presence and absence of cavitation. The critical cavitation number was calculated based on the cavitation breakdown characteristic curve. Two-phase flow inside the pump was simulated using the homogenous mixture method and the Rayleigh-Plesset model. The SST turbulence model and MRF rotating model were used to simulate turbulence and rotation of the flow throgh the pump, respecively. The critical cavitation number that was the outcome of numerical analysis results was compared to the experimental data. This comparison implied the necessity of considering the safety factor for determining the critical cavitation number and inlet pressure required to uninterrupted operation of the pump cavitation, using the results of numerical analysis.

Keywords

centrifugal pump

the critical cavitation number

inducer

CFD

the characteristic curve

20.1001.1.17352134.2021.14.1.8.9

Subjects

propulsion

Brennen C.E., Hydrodynamics of Pumps, Concepts NREC and Oxford University, 1994.
Coutier-Delgosha O., Reboud J. L., Fortes-Patella R,. Numerical Study of the Effect of the Leading Edge Shape on Cavitation Around Inducer Blade Sections,” JEME International Journal, Series B, Vol. 45, No. 3, 2002.
Tokumasu T., Sekino Y., Kamijo K., “The Numerical Analysis of the Effect of Flow Properties on the Thermodynamic Effect of Cavitation,” Trans. Japan Soc. Aero. Space Sci., Vol. 47, No. 156, 2004.
Ugajin H., Watanabe O., Kawai M., Kobayashi S., Tomaru H., Ohta T., “Numerical Simulation of Cavitating Flow in Inducers,” 40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Fort Lauderdale, 11-14 July 2004.
Pierrat D., Gros L., Pintrand G., Le Fur B., Gyomali Ph., “Experimental and Numerical Investigation of Leading-Edge Cavitation in a Helico-Centrifugal Pump,” 12th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Honolulu, Hawaii, February 17-22, 2008.
Yamamoto K., Tsujimoto Y., “Backflow Vortex Cavitation and Its Effects on Cavitation Instabilities,” International Journal of Fluid Machinary and Systems, Vol. 2, No. 1, January-March 2009.
Kang D., Yonezawa K., Horiguchi H., Kawata Y., Tsujimoto Y., “Cause of Cavitation Instabilities in ThreeDimensional Inducer,” International Journal of Fluid Machinary and Systems, Vol. 2, No. 3, July-September 2009.
An Y. J., Shin B. R., “Numerical Investigation of Suction Vortices Behavior in Centrifugal Pump,” Journal of Mechanical Science and Technology, Vol. 25(3), 2011.
Somashekar D., Purushothama H. R., “Numerical Simulation of Cavitation Inception on Radial Flow Pump,” IOSR Journal of Mechanical and Civil Engineering, Vol. 1, July-August 2012.
Campos-Amezcua R., Khelladi S., Mazur-Czerwiec Z., Bakir F., Campos-Amezcua A., Rey R., “Numerical and Experimental Study of Cavitating Flow Through an Axial Inducer Considering Tip Clearance, ” Proc ImechE Part A: J Power and Energy, Vol. 227(8), 2013.
Mishra A., Ghosh P., “Predicting Performance of Axial Pump Inducer of LOX Booster Turbo-pump of Staged Combustion Cycle Based Rocket Engine Using CFD,” IOP Conf. Series: Material Science and Engineering 101, 2015.
Guo X., Zhu Z., Cui B., Shi G., “Effects of the Number Blades on the Anti-Cavitation Characteristics and External Perfomancce of a Centrifugal Pump,” Journal of Mechanical Science and Technology, Vol. 30 (7), 2016.
Cheraqi A., Ebrahimi R., “Determination of a High-speed Centrifugal Pump’s Steady Performance Range by Computational Fluid Dynamics,” Scientific-Research Quarterly Journal of Aerospace Science and Technology, Vol. 13, Issue 2, 2021
American Petroleum Institute (API), “API 610 Std, Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas Industrie,” 10th Edition, 2010.