超临界压力下RP-3在细圆管内对流换热实验研究
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摘要
对超临界压力下RP-3在竖直细圆管内对流换热进行了实验研究。分析了变物性,浮升力、热加速等对流动换热的影响,并对已有关联式进行了修正。结果表明:在入口雷诺数4500的实验中,流动换热主要受变物性的影响,浮升力和热加速对流动换热的影响可忽略;在入口雷诺数为2500的实验中,在向上流动和高热流密度时,浮升力引起传热恶化,换热系数明显降低。
Heat transfer of the supercritical hydrocarbon fuels RP-3 in 2mm vertical tube has been experimentally investigated.The influences of the thermal properties,the buoyancy and the thermal acceleration on heat transfer were analyzed.A new correlation was proposed to predict the heat transfer.The results show that the buoyancy and the thermal acceleration effects can be neglected at a Reynolds number of 2500.At Reynolds number of 2500,the buoyancy force decreases the heat transfer of upward flow.
Heat transfer of the supercritical hydrocarbon fuels RP-3 in 2mm vertical tube has been experimentally investigated.The influences of the thermal properties,the buoyancy and the thermal acceleration on heat transfer were analyzed.A new correlation was proposed to predict the heat transfer.The results show that the buoyancy and the thermal acceleration effects can be neglected at a Reynolds number of 2500.At Reynolds number of 2500,the buoyancy force decreases the heat transfer of upward flow.
引文
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[2]Edwards T.Cracking and Deposition Behavior of Supercritical Hydrocarbon Aviation Fuels[J].Combustion Science and Technology,2006,178(1):307-334
[3]Huang H,Louis J,David R.Fuel-Cooled Thermal Management for Advanced Aeroengines[J].ASME J Eng Gas Turbines Power,2004,126(2):284-293
[4]王英杰.超临界压力RP-3流动换热及结焦实验研究[D].北京:北京航空航天大学,2009WANG Ying-Jie.Experimental Researches on Convection Heat Transfer and Coking of Superitical Pressure RP-3[D].Beijing:Beihang University,2009
[5]Shitsman M E.Impairment of the Heat Transmission at Supercritical Pressures,(in Russian)[J].Teplofizika Vysokikh Temperature,1963,1(2):267-275
[6]Jackson J D,Evans-Lutterodt K O.Impairment of Turbulent Forced Convection Heat Transfer to Supercritical Pressure CO_2 Caused by Buoyancy Forces[D].University of Manchester,1968
[7]Jiang P X,Zhang Y,Zhao C R,et al.Convection Heat Transfer of CO_2 at Supercritical Pressures in a Vertical Mini Tube at Relatively Low Reynolds Numbers[J].Experimental Thermal and Fluid Science,2008,32(8):1628-1637
[8]McEligot D M,Coon C W,Perkins H C.Relaminarization in tubes[J].International Journal of Heat and Mass Transfer,1970,13(2):431-433
[9]Murphy H D,Chambers F W,McEligot D M.Laterally Converging Flow PartⅠ.Mean Flow[J].Journal of Fluid Mechanics,1983,127(2):379-401
[10]赵陈儒.超临界压力流体在圆管内流动与对流换热研究[D].北京:清华大学,2011ZHAO Chen-Ru.Researches on Convection Heat Transfer and Flow of Supercritical Rressure Fluid in Tubes[D].Beijing:Tsinghua University,2011
[11]Zhu Y H,Liu B,Jiang P X.Experimental and Numerical Investigation on n-Decane Thermal Cracking at Supercritical Pressures in a Vertical Tube[J].Energy&Fuels,2014,28(1):466-474
[12]Krasnoshchekov E,Protopopov V,Van F,et al.Experimental Investigation of Heat Transfer for Carbon Dioxide in the Supercritical Region.2nd All-Soviet Union Conf[J].on Heat and Mass Transfer,Minsk,Belarus,1964,4(1):26-35