微小狭缝肋矩形通道多目标优化  

Multi-objective optimization of rectangular channel with miniature slit ribs

作　　者：孔德海 陈少秋 刘存良[1] 郭涛[1] KONG Dehai;CHEN Shaoqiu;LIU Cunliang;GUO Tao(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]西北工业大学动力与能源学院,西安710072

出　　处：《航空动力学报》2023年第5期1025-1037,共13页Journal of Aerospace Power

基　　金：国家自然科学基金(52006180);中央高校基础科研基金(3102020OQD702);国家科技重大专项(2017-Ⅲ-0001-0025)。

摘　　要：开展了矩形通道内微小狭缝肋的换热和流阻性能的多目标优化研究。选取缝宽、相邻缝间距、狭缝的前端面和后端面与壁面距离四个参数作为优化变量,采用非支配排序遗传算法(NSGA-Ⅱ)获得了Pareto最优解。分析了Pareto最优前沿面上四种优化方案下微小狭缝肋的流动和传热热特性。结果表明:优化后的微小狭缝肋的换热能力与实心肋相当,而流动阻力有所降低,肋壁的换热均匀性得到显著提高。A multi-objective optimization study of the heat transfer and flow resistance characteristics of the miniature slit ribs in a rectangular channel was carried out.Four parameters were selected as the optimization variables:the slit width,the distance between adjacent slits,and the distance between the front and rear ends of the slit and the wall surface,and the Pareto optimal solution was obtained by using the non-dominated sorting genetic algorithm(NSGA-Ⅱ).The flow and heat transfer characteristics of the miniature slit ribs under the four optimization schemes on the Pareto optimal front surface were analyzed.The results showed that the optimized miniature slit ribs provided nearly the same heat transfer as the solid ribs,while the flow resistance was reduced,and the uniform heat transfer of the ribbed wall was significantly improved.

关 键 词：内部冷却 微小狭缝肋 多目标优化 强化传热 流动阻力 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程]