【摘要】 本文实验研究了平板加热面FC-72液体的准稳态池沸腾传热现象,利用地面常重力实验、SJ-8卫星搭载微重力实验等手段,分析了不同重力、压力及过冷度条件下平板加热面上的池沸腾传热特性。微重力条件下,相近压力或过冷度时,传热系数和CHF随过冷度或压力增大而增大。相对常重力,传热曲线明显变缓,沸腾起始时的壁面过热度降低,CHF仅为常重力的40%或更低。更多还原

【Abstract】 In the present paper,pool boiling heat transfer of FC-72 on a plane plate used a quasi- steady heating method has been studied experimentally both in normal gravity on the ground and in microgravity aboard the Chinese recoverable satellite SJ-8.The influences of gravity level,pressure, and subcooling on heat transfer characteristics have been analyzed.It’s found that the nucleate boiling will be enhanced with the increase of subcooling or pressure for the same pressure or subcooling in microgravity,and that CHF will also increase with the subcooling and/or pressure.The boiling curves in microgravity have much smaller slopes than that in normal gravity,and that CHFs are also quite lower in microgravity,which is no more than 40% of that in terrestrial condition.更多还原