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.
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