Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2007, Vol. 18 ›› Issue (4): 252 doi: 10.1016/S1001-8042(07)60056-6

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Experimental study of high temperature particle dropping in coolant liquid

LI Tianshu* YANG Yanhua LI Xiaoyan HU Zhihua   

  1. School of Mechanical Power Engineering, Shanghai Jiaotong University, Shanghai 200030, China
LI Tianshu YANG Yanhua LI Xiaoyan HU Zhihua. Experimental study of high temperature particle dropping in coolant liquid.Nuclear Science and Techniques, 2007, 18(4): 252     doi: 10.1016/S1001-8042(07)60056-6

Abstract: A series of experiments of the premixing stage of fuel-coolant interactions (FCI), namely the particles falling into water, were carried out. The force on the particles during the course of falling has been studied. The dropping character of hot particle was influenced by three main parameters, i.e., particle temperature, particle diameter and coolant subcooling that varied over a wide range. A high-speed camera recorded the falling speed of the particle and the moving curves were obtained. The experimental results showed that for the film boiling on the surface of particle and water, the temperature increase of either particle or coolant would slow down the particle falling velocity. The falling velocity of particle in small diameter is lower than that of the bigger particle. The present work can provide an experimental foundation for further investigation of high-speed transient evaporation heat transfer.

Key words: Vapor explosion, FCI, Observable experiment equipment