航天器环境工程2018，Vol.35Issue(3)：233-240,8.DOI:10.3969/j.issn.1673-1379.2018.03.006
超临界压力下航空煤油RP-3在水平细圆管内对流换热特性实验研究
Experimental study of convective heat transfer of aviation kerosene RP-3 in horizontal tube under supercritical pressures
摘要
Abstract
To better understand the convective heat transfer of the hydrocarbon fuel in horizontal tubes under supercritical pressures, an experimental study is carried out for the convective heat transfer of the aviation kerosene RP-3 in a horizontal miniature round tube. Under the working conditions of the air-kerosene heat exchanger, the aviation kerosene is heated up to the supercritical regime. The influences of the heat flux, the fluid inlet temperature, and the buoyancy on the heat transfer of the RP-3 are analyzed. It is found that the heat transfer coefficients decrease with the increase of the heat flux, and the buoyancy causes a large temperature difference of 50 K between the top and the bottom surfaces of the test tube under high heat flux conditions, which can be predicted by the non-dimensional parameter Grq/Grth. The effects of the buoyancy on the heat transfer can be suppressed by increasing the mass flux. The results may provide a technological basis for the active thermal protection of the flight vehicles to be cooled by hydrocarbon fuels.关键词
主动热防护/航空煤油/水平流动/对流换热/超临界压力/雷诺数/浮升力Key words
active thermal protection/aviation kerosene/horizontal flow/convective heat transfer/supercritical pressure/Reynolds number/buoyancy分类
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贾洲侠,付衍琛,孔凡金,刘宝瑞,吴振强..超临界压力下航空煤油RP-3在水平细圆管内对流换热特性实验研究[J].航天器环境工程,2018,35(3):233-240,8.基金项目
国家自然科学基金项目(编号:11502023 （）
11502024 （）
11402028) （）
