Contribution of Microlayer Evaporation to Bubble Growth in Pool Saturated Boiling of Water
Contribution of Microlayer Evaporation to Bubble Growth in Pool Saturated Boiling of Water
复制标题
微层蒸发对池水饱和沸腾中气泡生长的贡献
DOI：
10.1115/icnmm2013-73211
复制
发表时间：
2013
影响因子：
--
通讯作者：
O. Nakabeppu
中科院分区：
文献类型：
--
作者：
T. Yabuki;T. Saitoh;O. Nakabeppu
通过使用 MEMS 热传感器测量表面温度并使用实验数据评估壁面传热，研究了微层的传热和形成特性。温度数据清楚地表明加热表面上的传热现象从微层形成经由微层干燥到干燥区域的再润湿的转变。微层蒸发可传递超过 1 MW/m2 的极高热通量，并且被发现是水的孤立气泡沸腾过程中壁传热的主要传热机制。发现微层蒸发对气泡生长的贡献为 50%，并且不随壁过热度变化。最后根据壁面传热计算微层初始厚度的空间分布。版权所有 © 2013 by ASME
Heat transfer and formation characteristics of the microlayer are investigated by the surface temperature measurement with a MEMS thermal sensor and the wall heat transfer evaluation using an experimental data. The temperature data clearly indicated transition of heat transfer phenomenon on the heated surface from microlayer formation via dry-out of the microlayer to rewetting of the dry-out region. Microlayer evaporation transferred extremely high heat flux over 1 MW/m2 and was found to be the dominant heat transfer mechanism in the wall heat transfer during isolated bubble boiling of water. The contribution of microlayer evaporation to bubble growth was found to be 50% and not vary with wall superheat. Finally the spatial distribution of initial thickness of microlayer was calculated from the wall heat transfer.Copyright © 2013 by ASME