摘要
本文提出了微重力下双组分池内核态沸腾时汽泡成长的微楔形液层模型，用以分析微楔形液层中液体的流动。从微层内传热和流体流动的角度考虑微层界面的变形特征，分析结果表明，低热流时，微层界面会向里移动，从而液层相互聚合而促使汽泡脱离，结果不仅与从根界面方程所获得的结论一致，也为实验观察所证实。高热流时，微层界面向外移动而导致临界热流现象发生，因而微楔形模型可用来解释高热流或临界热流现象。
A micro-wedge model for pool boiling of binary mixtures under micro-gravity is proposed, bywhich the flow in the micro-wedge is analyzed. From view of the flow and heat transfer feature in the microwedge layer, the variation of micro-wedge layer interface is investigated. The results demonstrate that microwedge layer interface will move inward and merge each other at certain heat f1uxes, and thus detach full-grownbubbles even under micro-gravity. The analytical results are in quite good agreement with the theoretical analyses and experimental observations in the literatures. At high heat fluxes, micro-wedge layer interface wall moveoutward and consequently result in the occurrence of CHF phenomena. The present studies extend our previousanalysis. The micro-wedge model can be also extended to explain pool boiling phenomena of binary mixtures athigh heat fluxes of CHF under micro-gravity.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
1999年第2期225-231,共7页
Chinese Journal of Hydrodynamics
基金
国家教委优秀年轻教师基金
