过渡流下多列叉排圆柱列流动传热特性对比研究
发布时间:2018-07-31 08:05
【摘要】:为了在过渡流状态下对小型化换热器叉排管束群的传热强化机理进行研究,对三列、五列叉排圆柱列的流动传热特性的数值模拟结果进行了对比研究。使用Fortran程序对基于复合网格系统的三列、五列叉排模型在不同横向间距(Ps/D)下的流动传热特性进行数值模拟。研究结果表明(1)当Ps/D=3时,五列叉排圆柱列的传热强化效果最好,Ps/D=4时,三列叉排圆柱列的传热强化效果最好;(2)在叉排管束群中,第二列圆柱列的对流换热效果最好,后排圆柱列的对流换热效果依次降低。(3)在叉排管束群中,当圆柱列列数增加时,Ps/D增大时,传热强化效果不明显。
[Abstract]:In order to study the heat transfer enhancement mechanism of the cross row bundle group of miniaturized heat exchangers under the transition flow state, the numerical simulation results of the flow heat transfer characteristics of the three row and five row cross row columns were compared and studied. The flow heat transfer characteristics of a three-row, five-row cross row model based on a composite grid system under different transverse spacing (Ps/D) were simulated by Fortran program. The results show that (1) when Psr / D = 3, the heat transfer enhancement effect of the five-row intersected column is the best than that of PsP / D = 4, and (2) the convection heat transfer efficiency of the second row cylindrical column is the best in the cross row tube bundle group. The convection heat transfer efficiency of the back column decreases in turn. (3) in the cross row bundle group, when the column number increases, the heat transfer enhancement effect is not obvious when the column number increases.
【作者单位】: 南通大学机械学院;
【基金】:国家自然科学基金(51476080)
【分类号】:TB657.5
本文编号:2154952
[Abstract]:In order to study the heat transfer enhancement mechanism of the cross row bundle group of miniaturized heat exchangers under the transition flow state, the numerical simulation results of the flow heat transfer characteristics of the three row and five row cross row columns were compared and studied. The flow heat transfer characteristics of a three-row, five-row cross row model based on a composite grid system under different transverse spacing (Ps/D) were simulated by Fortran program. The results show that (1) when Psr / D = 3, the heat transfer enhancement effect of the five-row intersected column is the best than that of PsP / D = 4, and (2) the convection heat transfer efficiency of the second row cylindrical column is the best in the cross row tube bundle group. The convection heat transfer efficiency of the back column decreases in turn. (3) in the cross row bundle group, when the column number increases, the heat transfer enhancement effect is not obvious when the column number increases.
【作者单位】: 南通大学机械学院;
【基金】:国家自然科学基金(51476080)
【分类号】:TB657.5
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