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Cavitation evolution and damage by liquid nitrogen in a globe valve

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2022年第2期23卷 101-117页

作者： Xia ZHOU Xiao-qin ZHI Xu GAO Hong CHEN Shao-long ZHU Kai WANG Li-min QIU Xiao-bin ZHANG Institute of Refrigeration and cryogenics Zhejiang UniversityHangzhou 310027China State Key Laboratory of Technologies in Space cryogenic Propellants Beijing 100028China

valves are key components of the safety of fluid transportation systems because of induced disturbance and cavitation damage in *** this study,a 2D model of a cryogenic globe valve with liquid nitrogen(LN_(2))as working fluid was established by Fluent,and thermal effects were specially considered in the *** validity of the LN_(2) cavitation model was verified by the experimental data of hydrofoil LN_(2) cavitation from earlier studies by *** characteristics of LN2 in the cryogenic globe valve under three typical working conditions were *** average pressure and pressure pulse at different positions of the wall were further studied to reveal cavitation risks from fatigue and *** show that with similar valve structure and openings,the pressure pulsation frequencies of LN_(2) are lower than those of water,and the shape and location of the cavitation clouds also show significant *** LN_(2) cavitation,an extended period of valve opening at 66% should be avoided since its pressure pulse peak is the largest compared to openings of 33% and 100%,and reaches 5×10^(7) *** opening of 33% should also be monitored because of the large torque caused by the pressure difference between the two sides of the valve *** prevent resonance,a critical state for the valve opening and the connecting pipe length is *** predictions of cryogenic cavitation in the globe valve are helpful for the safe and reliable operation of cryogenic fluid transport systems.

关键词： Cavitation Thermal effect cryogenic liquids cryogenic globe valve

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