高校化学工程学报Issue(1)：90-95,6.DOI:10.3969/j.issn.1003-9015.2015.01.013
微通道内流动沸腾不稳定性影响因素实验研究
Experimental Study on the Flow Boiling Instability Governing Parameters in Microchannels
摘要
Abstract
Flow boiling instabilities in microchannel can reduce the performance of equipment operation and disturb the heat transfer characteristic. The parallel triangle silicon microchannel heat sink was integrated with seed bubble generators in the microchannel upstream. The simultaneous optical visualization measurement experimental systems were set up. The flow boiling instability and heat transfer under different heater lengthes, mass fluxes and seed bubble frequencies were examined. The results show that, the heater length, heat and mass flux were identified as the key parameters to the boiling instability process. Longer heater length or lower flow rate induces earlier appearance of boiling incipience and critical heat flux. With heat flux increasing, the pressure drop decreases slightly and the temperature increases linearly in the single liquid phase region. However, the pressure drop increases sharply and the temperature increases exponentially in the vapor-liquid two phase flow region. Using triggering the generation of seed bubbles as the active controlling technic, the self-sustained boiling instability can be effectively controlled or fundamentally eliminated. Moreover, the heat transfer could be enhanced markedly. The seed bubble triggered technology is worth to be promoted.关键词
微通道/沸腾不稳定性/沸腾曲线/种子汽泡Key words
microchannel/boiling instability/boiling curve/seed bubble分类
生物科学引用本文复制引用
宗露香,徐进良,刘国华..微通道内流动沸腾不稳定性影响因素实验研究[J].高校化学工程学报,2015,(1):90-95,6.基金项目
国家自然科学基金-国际合作交流资助项目(512101064) （512101064）
国家自然科学基金-广东省联合重点基金资助项目(U1034004)。 （U1034004）
