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本文采用有限元数值方法,以无量纲最大热阻作性能指标,研究了6自由度(几何特征参数)二级组合Y形肋的构形优化,分析了不同自由度条件下二级组合Y形肋的传热性能.结果表明,二级组合能显著提高Y形肋的传热性能,其最小最大热阻比一级组合Y形肋的最小最大热阻降低了36.37%.这也再次证明了,事物进化的自由度越大,其性能越优.二级组合Y形肋各几何特征参数对其性能的影响是不一样的,在实际工程设计中应该给予不同的关注.其中2个角度对最大热阻的影响比较大,但角度的最优值都比较稳定;2个长度比对最大热阻的影响比2个厚度的影响大得多.
In this paper, by using the finite element method and the dimensionless maximum thermal resistance as the performance index, the optimization of the configuration of 6-DOF (geometric characteristic parameters) secondary Y-rib is studied. The effect of the Y- The result shows that the secondary combination can significantly improve the heat transfer performance of the Y-shaped rib, and the minimum maximum thermal resistance is reduced by 36.37% compared with the minimum maximum thermal resistance of the Y-rib of the first combination. This proves again , The greater the degree of freedom of the evolution of things, the better the performance of the two combinations of Y-shaped geometric parameters of the geometric parameters of its performance is not the same, in the actual engineering design should be given different attention. The influence of the maximum thermal resistance is relatively large, but the optimal values of the angles are relatively stable. The influence of the two lengths on the maximum thermal resistance is much greater than that of the two thicknesses.