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对多孔介质层内同轴管式井下换热器的自然对流传热过程进行了数值模拟。通过对井下换热器分段并依次在局部采用对流相似解法对其周围遵循 Darcy定律的多孔介质层内自然对流过程进行了近似求解。得到了有关多孔介质层物性参数对井下换热器热输出影响的规律。
The natural convection heat transfer process of coaxial tubular downhole heat exchanger in porous media was numerically simulated. The natural convection process in the porous media layer followed by Darcy’s law is approximated by segmenting the subterranean heat exchangers and using local convective similar solutions in turn. The law of the effect of physical parameters of porous media on the heat output of downhole heat exchanger was obtained.