微重力下流动沸腾中汽泡脱离机理初探  

A Preliminary Study on Bubble Departure in Flow Boiling under Microgravity

作　　者：吕成道[1] 李佛金[1] 程尚模[1] 

机构地区：[1]华中理工大学煤燃烧国家重点实验室

出　　处：《华中理工大学学报》1998年第6期53-55,共3页Journal of Huazhong University of Science and Technology

基　　金：国家高技术研究发展计划资助课题

摘　　要：从单个汽泡动力学着手定性地分析了影响微重力下流动沸腾中汽泡脱离的几个因素，提出了对汽泡脱离的一种理解：在一定工况条件下，如果已产生的汽泡在垂直于流动的方向上能够为新产生的汽泡持续提供足够空间，在平行于流动的方向上它又能随着两相流动及时地滑移开，即可以实现微重力下流动沸腾中汽泡的持续脱离，为微重力下核态沸腾的形成提供可能．Based on single bubble dynamics, several factors influencing the bubble departure in flow boiling under microgravity are qualitatively analyzed, and then an explanation on bubble departure under certain working conditions is put forward. If the formed bubble can provide enough room for the forming bubble continuously in the direction vertical to flow and can slip away with two phase flow in direction parallel to the flow, it means that the continuous bubble departure in flow boiling under microgravity can be realized. It will provide possibility for the formation of nucleate boiling under microgravity.

关 键 词：微重力 流动沸腾 汽泡动力学 汽泡脱离 航天器 

分 类 号：V474[航空宇航科学与技术—飞行器设计] V423