本文对超临界压力二氧化碳在烧结多孔介质的竖直圆管中的对流换热进行了实验研究.分析了入口温度超过准临界温度、颗粒直径为0.2～0.28 mm的多孔圆管中,压力、流量、热流密度以及流动方向对超临界二氧化碳对流换热的影响.结果表明,准临界点附近剧烈变物性的影响使得超临界二氧化碳在多孔结构中的对流换热非常复杂.对流换热随着温度远离准临界温度和热流密度的增加不断减弱;流量对对流换热的影响比较复杂.在准临界温度附近,浮升力对换热有一定的影响.
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