化工学报2019，Vol.70Issue(z1)：45-53,9.DOI:10.11949/j.issn.0438⁃1157.20190025
微重力条件下FC-72在针肋表面冷凝传热的实验研究
Experimental study on condensation of FC-72 in narrow rectangular channel with ellipse-shape pin fins in microgravity
摘要
Abstract
The condensation heat transfer of FC-72 in a narrow rectangular channel with four kinds of elliptical pin-fin surfaces and a flat surface under microgravity condition was studied by visualization experiments. The effects of microgravity on condensate distribution, steam-liquid interface, condensation substrate temperature, inlet steam temperature and heat flux were analyzed. The results showed that the steam-liquid interface in the narrow rectangular channel was unstable, fluctuated and climbed along the lateral wall in microgravity. No obvious changes were observed in liquid film on the condensing surface after the release of drop cabin. For unsteady state, the condensation substrate temperature increased slightly, and there was a certain delay. After the release of drop cabin, the change of flow pattern in steam generator coil improved the heating efficiency, which resulted in a sharp rise in inlet steam temperature. For pulsating state, the change of substrate temperature was similar to that of unsteady state, but there was no obvious change in inlet steam temperature. For quasi-steady state, the temperature at some temperature measuring points jumped a little bit, but the inlet steam temperature had no obvious change. Furthermore, the heat flux decreased sharply in microgravity, falling by 18.8%.关键词
微重力/椭圆形针肋/凝结/界面/温度/两相流Key words
microgravity/ elliptical pin-fin/ condensation/ interface/ temperature/ two-phase flow分类
能源科技引用本文复制引用
张雷刚,许波,施娟,陈振乾..微重力条件下FC-72在针肋表面冷凝传热的实验研究[J].化工学报,2019,70(z1):45-53,9.基金项目
国家自然科学基金项目(51606037) （51606037）
中欧载人航天空间科学和应用合作项目 （）
江苏省自然科学基金项目(BK20160687) （BK20160687）
