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化工学报  2012 

含内热源多孔介质通道内ONB特性

DOI: 10.3969/j.issn.0438-1157.2012.10.011, PP. 3080-3085

Keywords: 内热源,多孔介质,ONB

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Abstract:

对含内热源多孔介质通道内过冷沸腾起始点(ONB)的特性进行了实验研究,采用壁温拐点法确定了ONB。在表观流速为0.025~0.050m·s-1,热通量为7.5~52kW·m-2的范围内研究了各参数对ONB的影响规律。实验结果表明:出现ONB时壁温存在一个明显拐点;越靠近实验段出口,出现ONB所需壁面过热度越小,表面热通量越低;表观流速越高,出现ONB所需壁面过热度越大,表面热通量越高。

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