基于遗传算法的非对称翼形翅片印刷电路板式换热器优化设计  

Optimal design of the printed circuit heat exchanger with asymmetric airfoil fins based on genetic algorithm

作　　者：王丹[1,3] 李家港 潘康 王珂[2,3] 刘遵超[2,3] WANG Dan;LI Jiagang;PAN Kang;WANG Ke;LIU Zunchao(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China;School of Mechanics and Safety Engineering,Zhengzhou University,Zhengzhou 450001,China;Key Laboratory of Process Heat Transfer and Energy Saving of Henan Province,Zhengzhou University,Zhengzhou 450002,China)

机构地区：[1]郑州大学机械与动力工程学院,郑州450001 [2]郑州大学力学与安全工程学院,郑州450001 [3]郑州大学河南省过程传热与节能重点实验室,郑州450002

出　　处：《压力容器》2023年第7期36-46,共11页Pressure Vessel Technology

基　　金：国家自然科学基金项目(51776190);河南省科技攻关项目(222102320020,222102320230)。

摘　　要：为了研究结构参数和入口雷诺数对非对称翼形翅片印刷电路板式换热器(PCHE)性能的影响,首先基于计算流体力学对简化的非对称翼形翅片PCHE进行三维数值模拟,通过拟合计算结果得出了误差分别在10%和13%以内的努塞尔数Nu和摩擦系数f的经验准则式;然后,采用一维分析方法来计算全尺寸PCHE(不对换热器模型进行简化)的体积、换热量和压降等参数;最后,将全尺寸PCHE单位体积的换热量(Q/V)和总压降(Δ_(p))作为目标函数,将翅片横向间距、翅片厚度和入口雷诺数作为设计变量,结合NSGA-Ⅱ算法进行多目标优化设计。研究结果表明,与翅片横向距离为4.8 mm时相比,当翅片横向距离为3 mm时,换热器的Q/V最大可增加88.7%,Δ_(p)最大可增加178.6%;与翅片厚度为0.6 mm时相比,当翅片厚度为2.4 mm时,换热器的Q/V最大可增加76.5%,Δ_(p)最大可增加93.9%;与本文所研究的其他结构参数的非对称翼形翅片PCHE综合对比,使用NACA8540翼形翅片的PCHE具有最佳的性能。所得结论对于非对称翼形翅片PCHE的应用具有一定指导意义。To investigate the effects of structural parameters and inlet Reynolds number on the performance of the asymmetric airfoil fin printed circuit heat exchanger(PCHE),a three-dimensional numerical simulation based on computational fluid dynamics(CFD)was carried out,and the results were fitted to obtain the empirical criterion formulas of Nusselt number(Nu)with deviation less than 10%and friction factor(f)with deviation less than 13%.Then,a one-dimensional analysis method was used to calculate the volume,heat transfer rate,and total pressure drop of the full-size PCHE(without simplifying the heat exchanger model).Finally,a multi-objective optimization design using the NSGA-Ⅱalgorithm was carried out by using the Q/V andΔ_(p)as the objective functions,and using the transverse spacing,fin thickness,and inlet Reynolds number as the design variables.The research results show that,compared with the transverse fin spacing of 4.8 mm,when the transverse spacing equals to 3 mm,the values of Q/V can be increased by up to 88.7%,and the values ofΔ_(p)can be increased by up to 178.6%.Compared with the fin thickness of 0.6 mm,when the fin thickness equals to 2.4 mm,the values of Q/V can be increased by up to 76.5%,and the values ofΔ_(p)can be increased by up to 93.9%.The NACA8540 airfoil fin PCHE has the best performance compared with the other asymmetric airfoil fin PCHE with different structural parameters.The conclusions obtained herein have certain guiding significance for the application of PCHE with asymmetric airfoil fins.

关 键 词：非对称翼形翅片 遗传算法 印刷电路板式换热器(PCHE) 一维分析 多目标优化设计 

分 类 号：TH49[机械工程—机械制造及自动化] TQ051.5[化学工程] TQ021.3