Viscous oils can degrade the cavitation performance of a centrifugal pump, how to improve the impaired performance is a problem which we must deal with, naturally it is quite necessary to have a full understanding of characteristics of viscous oil cavitating flows. In the paper, outcomes in the study on viscous oil cavitating flows are reviewed briefly; effects of liquid surface tension, viscosity and non-condensable gas(air)content on the characteristics are explained. The cavitation nucleation mechanism, cavitation CFD modeling and cavitation criteria are argued, a few prospects in the study on viscous oil cavitating flows are proposed as well. In conclusion, there are many experiments on viscous oil cavitating flows over a hydrofoil or through a cascade or inside a centrifugal pump that need to be done; updates in the cavitation CFD models are on demand too. Additionally the applicability of the maximum tension cavitation criterion into viscous oil cavitating flows needs to be clarified.
Cao Guangjun, Wu Yulin, Liu Shuhong, et al. Experiment studies on cavitation characteristics of the centrifugal oil pump for pumping viscous liquid[J]. Journal of Engineering Thermophysics, 2006, 27(5): 784-786.(in Chinese)
Cao Guangjun, Wu Yulin, Liu Shuhong, et al. Influence of the shaft speed to the centrifugal oil pump cavitation characteristics and conversion study[J]. Journal of Engineering Thermophysics, 2008, 29(1): 65-67.(in Chinese)
Poritsky H. The Collapse or growth of a spherical bubble or cavity in a viscous fluid[C]//Proceedings of the First US ASME National Congress on Applied Mechanics, 1952: 813-821.
Levkovskii Y L, II′in V P. Effect of surface tension and viscosity on the collapse of a cavitation bubble[J]. Journal of Engineering Physics, 1968, 14(5): 903-908.
Yang W, Yeh H C. Theoretical study of bubble dynamics in purely viscous fluids[J]. AIChE Journal, 1966, 12(5): 927-931.
Kuvshinov G I. Effect of surface tension on the collapse of a cavitation bubble[J]. Journal of Engineering Physics, 1991, 60(1): 41-46.
Samiei E, Shams M, Ebrahimi R. A novel numerical scheme for the investigation of surface tension effects on growth and collapse of cavitation bubbles[J]. European Journal of Mechanics B: Fluid, 2011, 30: 41-50.
Liu X M, He J, Lu J, et al. Growth and collapse of laser-induced bubbles in glycerol-water-mixtures[J]. Chinese Physics B, 2008, 17(7): 2574-2579.
Iwai Y,Li S C. Cavitation erosion in water having different surface tensions[J]. Wear, 2003, 254(1/2): 1-9.
Matsuura Y, Tanibayashi H. Cavitation inception in still water caused by gradually decreased static pressure(Effects of air content and temperature in water)[J]. Transactions of JSME: Series B, 1999, 65(633): 1658-1664.(in Japanese)
Wade R B. Investigation on Cavitating Hydrofoils[D]. Pasadena, California, USA: California Institute of Technology, 1965.
Wood D W, Hart R J, Marra E. Application guidelines for pumping liquids that have a large dissolved gas content[C]//Proceedings of the 1st International Pump Users Symposium. Texas A&M University, Texas, USA:[s.n.], 1983: 91-98.
Budris A R, Mayleben P A. Effects of entrained air, NPSH margin and suction piping on cavitation in centrifugal pumps[C]//Proceedings of the 15th International Pump Users Symposium. Texas A&M University, Texas, USA:[s.n.], 1998: 99-107.
Turley R S, Dickman D L, Parker J C, et al. Influence of gas seals on pump performance at low suction head condition[C]//Proceedings of the 17th International Pump Users Symposium. Texas A&M University, Texas, USA:[s.n.], 2000: 23-28.