A Novel Kinetic Model of Liquid Nitrogen＇s Explosive Boiling at the Initial Stage  

作　　者：淮秀兰 董兆一 李志刚 尹铁男 邹玉 

机构地区：[1]Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100080 [2]Beijing Longyuan Cooling Technology Co., Ltd, Beijing 100176 [3]Graduate School of the Chinese Academy of Sciences, Beijing 100080

出　　处：《Chinese Physics Letters》2007年第9期2613-2616,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 50576099, the Hi-Tech Research and Development Programme of China under Grant No 2006AA05Z203, and the Institute of Engineering Thermophysics, Chinese Academy of Sciences.

摘　　要：The liquid nitrogen＇s explosive boiling characteristics under transient high heat flux have attracted increasing attentions of researchers over the world due to its wide applications. Although some experiments have been performed, the process and the characteristics at the initial stage, especially within 1 ~s, have not been described reasonably yet. Based on the related experiments and theoretical analysis, a novel kinetic model combined with quasi-fluid idea is presented to analyse the characteristics of liquid nitrogen＇s explosive boiling at the initial stage. The results indicate that the model can appropriately describe the liquid nitrogen＇s explosive boiling. The behaviour and the heat transfer characteristics of a single bubble are very different from those of the bubble cluster, thus the behaviour of individual bubbles could not be directly applied to describe the explosive boiling process at the initial stage.The liquid nitrogen＇s explosive boiling characteristics under transient high heat flux have attracted increasing attentions of researchers over the world due to its wide applications. Although some experiments have been performed, the process and the characteristics at the initial stage, especially within 1 ~s, have not been described reasonably yet. Based on the related experiments and theoretical analysis, a novel kinetic model combined with quasi-fluid idea is presented to analyse the characteristics of liquid nitrogen＇s explosive boiling at the initial stage. The results indicate that the model can appropriately describe the liquid nitrogen＇s explosive boiling. The behaviour and the heat transfer characteristics of a single bubble are very different from those of the bubble cluster, thus the behaviour of individual bubbles could not be directly applied to describe the explosive boiling process at the initial stage.

关 键 词：NUCLEATION 

分 类 号：O552[理学—热学与物质分子运动论]