液体内部汽化的汽化空间与拟沸腾

• 作 者: 彭晓峰 王补宣
• 机 构: 清华大学热能工程系,清华大学热能工程系
• 出 处: 中国科学基金
• 发表日期: 1994年01期
• 关键词: 相变传热 核沸腾 沸腾传热 流动沸腾 空间尺度 传热机理 液体流 液滴 汽泡生长 传热过程

本文分析了几种不同的相变与沸腾传热现象,报道了实验考察到的微型槽内的液体流动沸腾,发现液体流动的空间尺度对相变与沸腾形态有重要影响,由此提出液体内部汽化的“汽化空间”与“拟沸腾”两个全新的重要概念,分析讨论了小尺度液体的相变传热机理,并对“拟沸腾”过程的可能机制及物理模型尝试作出定性分析。文中还引用新概念对核沸腾的传热机制作了某些新的解释。

In this paper, several different phase transitions and boiling heat transfer phenomena are analyzed. It is reported that liquid flow boiling in the microchannels experimentally investigated. It is found that the spatial scale of the liquid flow has an important influence on the phase transition and boiling patterns. Therefore, Vaporization “space” and “pseudo-boiling” two important new concepts, analysis and discussion of small scale liquid phase transition heat transfer mechanism, and “pseudo-boiling” process possible mechanisms and physical models try to make a qualitative analysis. The article also quotes the new concept of nuclear boiling heat transfer mechanism made some new explanations.