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本文建立了三维方腔内竖直板混合对流换热的数学模型,探讨Re数、进风口位置、竖直板位置对混合对流换热的影响。结果表明:随Re数增加,竖直板下部的平均Nu_2下降,而总体平均Nu_1增加。随送风口高度增加,竖直板对流换热量增加。在竖直板位置L_1/H=0.5～1.5的范围内,竖直板处于中间位置L_1/H=1.0时,竖直板混合对流换热量最小。
In this paper, a mathematical model of mixed convection heat transfer in a vertical square plate in a three-dimensional square cavity is set up. The effects of Re number, inlet position and vertical plate position on mixed convective heat transfer are discussed. The results show that as the Re number increases, the average Nu_2 of the lower part of the vertical plate decreases, while the average average Nu_1 increases. With the air outlet height increases, vertical plate convection heat transfer increases. In the vertical plate position L_1 / H = 0.5 ~ 1.5 range, the vertical plate in the middle position L_1 / H = 1.0, the vertical mixing heat exchanger minimum.