Abstract：In order to study the cavitation problem of CAP1400 nuclear main coolant pump, the steady numerical simulation on the cavitation problem was conducted on the the basis of hydraulic design and three-dimensional modeling.The distribution characteristics of vapor volume fraction on the suction side of impeller blades, vapor volume fraction between blades and medium temperature between blades were acquired under the normal condition, incipient cavitation, critical cavitation, severe cavitation and fracture cavitation.The calculation results show that the nuclear main coolant pump cavitation occurs on the suction side of impeller blades first and develops in the direction of pressure side of blade and hub.Vapor volume fraction growth trend is the same from the relative position S=0.35-0.45, and vapor volume fraction is relatively smooth from S=0.45-0.50 in the impeller passage at the stage of critical cavitation and severe cavitation.Temperature gradient was formed in the liquid phase near the two-phase interface due to heat transfer between the two-phase caused by phase change.The vapor medium temperature inside the cavity is lower than the temperature of the liquid medium, and the temperature difference increases with the development of cavitation.
朱荣生, 陈宗良, 王秀礼, 曹梁. CAP1400核主泵空化特性数值研究[J]. 排灌机械工程学报, 2016, 34(6): 490-495.
ZHU Rongsheng, CHEN Zongliang, Wang Xiuli, Cao Liang. Numerical study on cavitation characteristics of CAP1400 nuclear main coolant pump. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(6): 490-495.
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