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目的:研究板翅换热器入口位置(入口段、导流段以及换热段)在不同翅片排列方式下,换热器流道内流体流动以及温度变化情况,期望得到能够实现最优传热效果的板翅换热器入口位置合理的翅片排列方式。方法:1.构建7种不同入口翅片排列(入口段:导流段:换热段分别为5:8:11,5:8:6,5:8:21,5:4:11,5:16:11,9:8:11和3:8:11),研究不同翅片排列下换热器入口位置流场以及温度场变化。2.分析板翅换热器入口位置6种不同网格划分结果(网格数分别为11962,39344,2120,207998,90738和54496)对计算误差的影响,验证网格收敛性。结论:通过分析板翅换热器入口位置不同翅片排列方式下换热器入口位置流场与温度场变化可以看出,相比入口段与换热段,导流段翅片排列对换热器温度场影响较大。强化导流段翅片排列可以使换热器获得更好的传热效果。
OBJECTIVE: To study the fluid flow and temperature change in the flow channel of heat exchanger under the different fin arrangement at the entrance of plate fin heat exchanger (inlet section, diversion section and heat exchange section), and to expect the optimal heat transfer Effect of the plate fin heat exchanger inlet location of a reasonable arrangement of the fin. Seven different inlet fin configurations were constructed (inlet section: diversion section: 5: 8: 11,5: 8: 6,5: 8:21,5: 4: 11,5 : 16: 11, 9: 8: 11 and 3: 8: 11) to study the flow field and the change of temperature field at the inlet of heat exchanger under different fin arrangements. Analyze the effects of six different gridding results (the number of grids are 11962, 39344, 2120, 207998, 90738 and 54496) on the calculation error and verify the grid convergence. Conclusion: By analyzing the change of flow field and temperature field at the inlet of heat exchanger under different fin arrangement at the inlet of plate fin heat exchanger, it can be seen that compared with inlet section and heat exchange section, Temperature field greater impact. Reinforcing the fins fin arrangement can make the heat exchanger get better heat transfer effect.