竖直多孔介质同心套管内混合对流的研究

MIXED CONVECTION IN POROUS MEDIA BETWEEN VERTICAL CONCENTRIC CYLINDERS

在简要综述研究现状的基础上，本文通过量级分析导出了影响竖直多孔介质同心套管内混合对流的无量纲参数，提出厂简化混合对流为受迫对流的判据，分析计算了非达西效应的影响，并与实验研究的结果进行了对比。／ＲｅｐａｎｄＨ／ｄｐ，ｗｈｉｃｈｇｏｖｅｒｎｔｈｅｍｉｘｅｄｃｏｎｖｅｃｔｉｏｎｉｎａｖｅｒｔｉｃａｌａｎｎｕｌｕｓｆｉｌｌｅｄｗｉｔｈｐｏｒｏｕｓｍｅｄｉａ，ａｒｅｄｅｄｕｃｅｄｔｈｒｏｕｇｈｄｉｍｅｎｓｉｏｎａｌａｎａｌｙｓｉｓ，ａｎｄｔｈｅｃｒｉｔｅｒｉａｆｏｒｍｉｘｅｄｃｏｎｖｅｃｔｉｏｎｉｓｅｓｔａｂｉｌｉｓｈｅｄｔｈｅｒｅｂｙ．Ｔｈｅｍｉｘｅｄｃａｌｃｕｌａｔｅｄｒｅｓｕｌｔｓｆｏｒｄｅｔｅｃｔｉｎｇｔｈｅｎｏｎ－Ｄａｒｃｙｅｆｆｅｃｔｓａｒｅｄｉｓｃｕｓｓｅｄ．Ｔｈｅｐｒｅｄｉｃｔｅｄｒｅｓｕｌｔｓａｇｒｅｅｗｅｌｌｗｉｔｈｔｈｅｅｘｐｅｒｉｍｅｎｔｓ．Ｋｅｙｗｏｒｄｓ：ｐｏｒｏｕｓｍｅｄｉａ；

In this paper,dimensionless parameters Gr**/Rep and H/dp, which govern the mixed convection in a vertical annulus filled with porous media, are deduced through dimensional analysis,and the criteria for mixed convection is estabilished thereby.The mixed calculated results for detecting the non-Darcy effects are discussed.The predicted results agree well with the experiments.