基于NSGA-II和响应面法的交错内肋微通道热沉的多目标优化  

Multi-objective Optimization of Staggered Ribbed Microchannel Heat Sinks Based on NSGA-II and Response Surface Methodology

作　　者：吕进 彭毅[1] 关小雅 杨冲 LÜJin;PENG Yi;GUAN Xiaoya;YANG Chong(College of Mechanical Engineering,Guizhou University,Guiyang g 550025,China)

机构地区：[1]贵州大学机械工程学院,贵阳550025

出　　处：《工程热物理学报》2025年第2期627-637,共11页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.52065011,No.52365031);贵州省科技支撑计划项目(黔科合支撑[2023]一般303)。

摘　　要：微通道热沉因其优越的散热性能,在高性能电子器件散热领域备受青睐。为有效提高交错内肋微通道热沉的散热性能,本文面向交错内肋微通道的多目标优化问题,将非支配排序遗传算法II(NSGA-II)与响应面法相结合,在满足微通道进出口压降最小和换热面最大温差最小的条件下进行优化。采用Box-Behnken实验设计方法,以肋片迎流角、肋片间距和肋片高度为设计变量,进出口压降和换热面最大温差为目标函数,对热沉的流动和传热性能进行数值模拟研究。为降低进出口压降和提高温度均匀性,采用NSGA-II对微通道热沉的几何参数进行优化,与原设计相比,采用NSGA-II得到的Pareto最优解在进出口压降几乎不变的情况下,换热面最大温差降低了34.922%,在相同泵功下,综合传热性能提高了9.415%。Microchannel heat sinks are highly favored in the thermal management of high-performance electronic devices due to their superior heat dissipation capabilities. To effectively enhance the heat dissipation performance of staggered ribbed microchannel heat sinks, this paper addresses the multi-objective optimization problem for such heat sinks by combining the Non-dominated Sorting Genetic Algorithm II(NSGA-II) with response surface methodology. The optimization is carried out under the conditions of minimizing both the pressure drop across the microchannel inlets and outlets and the maximum temperature difference on the heat exchange surface. The Box-Behnken experimental design method is employed, with the rib incidence angle, rib spacing, and rib height as design variables, and the pressure drop and maximum temperature difference on the heat exchange surface as objective functions, to conduct a numerical simulation study on the flow and heat transfer performance of the heat sink. To reduce the pressure drop and improve temperature uniformity,NSGA-II is used to optimize the geometric parameters of the microchannel heat sink. Compared to the original design, the Pareto optimal solution obtained using NSGA-II resulted in a 34.922%reduction in the maximum temperature difference on the heat exchange surface, with almost no change in the pressure drop, and an overall improvement in heat transfer performance by 9.415%under the same pumping power.

关 键 词：微通道 数值模拟 多目标优化 NSGA-II 响应面法 

分 类 号：TK124[动力工程及工程热物理—工程热物理]