工程机械百叶窗翅片式散热器的多目标优化设计

摘要

In order to improve the heat transfer performance of construction machinery radiator with louvered fins,a multi-objective optimization design method is proposed in terms of mass and comprehensive evaluation factors.With the reliability of numerical simulation method,the fin heat transfer and flow resistance characteristics are calculated via CFXTM based on fluid-structure coupling.By establishing three-dimensional parametric model using SolidWorksTM and ANSYS WorkbenchTM,the higher comprehensive evaluation factor and lighter weight are obtained,whereas the Pareto optimal solution set is attained by the multi-objective genetic algorithm for optimization.Under the same comprehensive performance evaluation factor of fin,the fin heat dissipation performance is improved by optimizing the fin quality.Therein,it is detected from results that the approach is suitable for multiparameter optimization on louvered fins,whilst the radiator heat transfer performance is improved using the fixed size of radiator.In addition,the comprehensive performance evaluation factor is increased by 1.94％,whereas the quality is reduced by 21％.%为了提高工程机械百叶窗翅片式散热器的散热性能,提出了基于翅片质量和综合性能评价因子的多目标优化设计方法.在保证数值仿真方法可靠的前提下,在CFX中基于流固耦合的方法对翅片的传热特性和流阻特性进行了计算和分析.利用SolidWorks三维建模参数化模型后,在ANSYS Workbench仿真软件中,运用多目标遗传算法对翅片质量和综合性能评价因子进行多目标优化,得到Pareto优化解集.在保证翅片翅片综合性能评价因子基本不变的前提下,通过优化翅片质量提高散热器的散热性能.结果表明:该方法适合百叶窗翅片的多参数优化,在散热器外形尺寸一定的情况下,提高了散热器的散热性能.综合性能评价因子增加了1.94％,质量减轻了21.00％.