Abstract：A revised Kubota cavitation model to consider the thermal effect and the SST k-ω two-equation turbulence model were applied into the simulation of cavitating flows of liquid hydrogen and water in an inducer to study its cavitation characteristics. Not only the cavitating flows in the inducer under different cavitation conditions with those fluids were numerically predicted, but also the power and cavitation performances were analyzed. It was found that the revised Kubota cavitation model can simulate the liquid hydrogen cavitating flows very well, and a good agreement was achieved between the numerical results and experiment data. Compared with water, the inducer head with liquid hydrogen is higher, and the critical cavitation number and cavity size are smaller. This is due to the diffe-rence in physical properties of two fluids, especially the influence of their thermal effect. Cavitation performance of inducer is obviously improved and its incipient cavitation number is decreased when li-quid hydrogen is used as the working fluid compared with water.
王小波, 王国玉, 时素果, 吴钦. 诱导轮内部液氢空化流动特性[J]. 排灌机械工程学报, 2013, 31(7): 558-564.
Wang Xiaobo, Wang Guoyu, Shi Suguo, Wu Qin. Characteristics of cavitating flow of liquid hydrogen in inducer. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(7): 558-564.
[1]Jackson J K. Liquid rocket engine turbopump inducers[R].NASA SP-8052,1971.[2]Utturkar Y,Wu J,Wang G,et al. Recent progress in modeling of cryogenic cavitation for liquid rocket propulsion[J]. Progress in Aerospace Sciences, 2005,41(7): 558-608.[3]Hosangadi A, Ahuja V, Ungewitter R J, et al. Analysis of thermal effects in cavitating liquid hydrogen inducers[J]. Journal of Propulsion and Power, 2007,23(6): 1225-1234.[4]庄保堂,罗先武,王鑫,等. 立式多级筒袋泵诱导轮及首级叶轮内的空化流动模拟[J].清华大学学报:自然科学版,2011,51(2):267-271. Zhuang Baotang,Luo Xianwu,Wang Xin,et al. Numerical simulations of cavitating flow in the inducer and primary impeller of a multi-stage vertical barrel pump [J]. Journal of Tsinghua University: Science & Technology, 2011,51(2):267-271.(in Chinese)[5]陈晖,李斌,张恩昭,等.诱导轮空化流动数值模拟[J].流体机械,2007,35(1):21-24. Chen Hui,Li Bin,Zhang Enzhao,et al. Rotating cavitation of the high-speed rotational plate inducer[J]. Fluid Machinery,2007,35(1):21-24.(in Chinese)[6]郭晓梅,朱祖超,崔宝玲,等.诱导轮内流场数值计算及空蚀特性分析[J]. 机械工程学报,2010,46(4):122-128. Guo Xiaomei,Zhu Zuchao,Cui Baoling,et al. Analysis of cavitation and flow computation of inducer[J]. Journal of Mechanical Engineering,2010,46(4):122-128.(in Chinese)[7]衣同训,程芳真,索沂生,等.液氢诱导轮内部流场数值计算研究[J].推进技术,2000,21(4):9-11. Yi Tongxun,Cheng Fangzhen,Suo Yisheng,et al. Numerical investigation of the flow field inside the liquid hydrogen inducer[J]. Journal of Propulsion Technology,2000,21(4):9-11.(in Chinese)[8]时素果,王国玉,马瑞远.低温流体空化特性的数值计算研究[J].工程力学,2012,29(5):61-67. Shi Suguo,Wang Guoyu,Ma Ruiyuan. Numerical study of cavitation in cryogenic fluids[J]. Engineering Mechanics,2012,29(5):61-67.(in Chinese)[9]Kubota A, Kato H, Yamauchi H, et al. Unsteady structure measurement of cloud cavitation on a foil section using conditional sampling technique[J]. Journal of Fluids Engineering,1989,111(2):204-210.[10]Singhal A K, Athavale M M, Li H Y, et al. Mathematical basis and validation of the full cavitation model[J]. Journal of Fluids Engineering,2002,124(3):617-624.[11]Florian R,Menter Z. Two equation k-ω turbulence models for aerodynamic flow[R].AIAA-93-2906,1993.[12]Strelets M. Detached eddy simulation of massively separated flows[R].AIAA-01-0879, 2001.[13]Gustavsson J P R, Denning K C, Segal C. Hydrofoil cavitation under strong thermodynamic effect[J]. Journal of Fluids Engineering,2008,130(9):091303.
