基于构形理论,以质量积耗散率最小为优化目标,在构造体总体积和高渗透性材料一定的条件下,对基于环形高渗透性通道的圆柱形构造体进行传质构形优化,得到无量纲平均压差最小的圆柱体构造体最优构形。结果表明:存在最佳高渗透性通道尺寸比(D_1/D_0)_(opt)和最佳圆柱形构造体径高比(H_0/H_1)_(oo)使得圆柱形构造体的无量纲平均压差取得二次最小值。增加单元体数目n有助于提高圆柱形构造体的传质性能;当n〉5时,其传质性能提高幅度很小,此时增加单元体数目对其传质性能改善不明显。基于质量积耗散率最小所得到的圆柱形构造体最优构形能够降低构造体的平均传质压差,改善其整体传质性能。
Based on constructal theory, the constructal mass transfer optimization of a cylindrical assembly with circular high permeability channel is carried out by taking minimum mass entransy dissipation rate as optimization objective. For the specified total volume of the assembly and total amount of the high permeability material, the optimal construct of the cylindrical assembly with minimum dimensionless average pressure difference is obtained. The results show that there exist the optimal ratio (D1/D0)opt of the high permeability channel and the optimal diameter and height ratio (H0/H1)oo of the cylinder which lead to the double minimum average pressure difference of the cylindrical assembly. The mass transfer performance of the cylindrical assembly increases with the element number n; this increment becomes small when n 〉 5, and the improvement of the mass transfer performance of the cylindrical assembly is not obvious by increasing the element number in this case. The optimal construct based on minimum mass entransy dissipation rate can reduce the av- erage pressure difference of the cylindrical assembly, and improves its global mass transfer performance.