本文对超临界压力下正癸烷在内径为0.95 mm和2 mm竖直微细圆管内对流换热进行了实验研究.入口压力pin=3 MPa和入口雷诺数Rein=4000时,分析了管径、变物性、浮升力和加速对对流换热的影响.结果表明:在所研究的工况范围内,对于0.95 mm内径圆管,浮升力和加速对换热的影响可忽略,对流换热主要受变物性的影响;而对于2mm内径圆管,在高热流密度时,浮升力对正癸烷的对流换热影响很大,向上流动时引起换热恶化,向下流动时引起换热强化,加速对流动换热的影响可忽略.
参考文献
| [1] | TIM EDWARDS .CRACKING AND DEPOSITION BEHAVIOR OF SUPERCRITICAL HYDROCARBON AVIATION FUELS[J].Combustion science and technology,2006(1/3):307-334. |
| [2] | He Huang;Louis J. Spadaccini;David R. Sobel .Fuel-Cooled Thermal Management for Advanced Aeroengines[J].Journal of engineering for gas turbines and power: Transactions of the ASME,2004(2):284-293. |
| [3] | Romney B. Duffey;Igor L. Pioro .Experimental heat transfer of supercritical carbon dioxide flowing inside channels (survey)[J].Nuclear engineering and design,2005(8):913-924. |
| [4] | Jiang PX;Zhang Y;Zhao CR;Shi RF .Convection heat transfer of CO2 at supercritical pressures in a vertical mini tube at relatively low reynolds numbers[J].Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics,2008(8):1628-1637. |
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