基于响应面法的X型桁架阵列通道冷却性能优化  

Optimization of cooling performance of X-type truss array channelbased on response surface methodology

作　　者：席雷 高建民[1] 徐亮[1] 赵振[1] 李云龙[1] XI Lei;GAO Jianmin;XU Liang;ZHAO Zhen;LI Yunlong(State Key Laboratory for Manufacturing Systems Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学机械制造系统工程国家重点实验室,西安710049

出　　处：《航空动力学报》2024年第1期19-27,共9页Journal of Aerospace Power

基　　金：陕西省自然科学基础研究计划青年项目(2022JQ-545);中国博士后科学基金(2021M702573)。

摘　　要：基于数值结果构建了有关X型桁架通道壁面平均努塞尔数、摩擦因数和综合热力系数的2阶响应面模型,分析了桁架杆直径比、桁架杆夹角和桁架杆倾角等对X型桁架通道冷却性能的影响规律,并优化得到了最佳参数。结果表明:增大桁架杆直径比和桁架杆夹角均可以快速地提高平均努塞尔数,但也相应地增大了摩擦因数;增大桁架杆倾角先提高后又降低了平均努塞尔数和摩擦因数;增大桁架杆直径比、桁架杆夹角和桁架杆倾角均会使综合热力系数先增大后减小。当桁架杆直径比为0.0750、桁架杆夹角为60°和桁架杆倾角为33.79°时通道的传热性能最优;当桁架杆直径比为0.067、桁架杆夹角为37.88°和桁架杆倾角为31.36°时通道的综合热力性能最优。Based on the numerical results,the second-order response surface models with high prediction accuracy for the wall average Nusselt number,friction coefficient and comprehensive thermal coefficient of X-type truss channel were built.The influence laws of truss rod diameter ratio,truss rod included angle and truss rod inclination angle on the cooling performance of X-type truss array channel were analyzed,and the optimal parameters were obtained by optimization.The results showed that increasing truss rod diameter ratio and truss rod’s included angle both can greatly improve average Nusselt number,but also increased the friction coefficient accordingly.Enlarging truss rod’s inclination angle first increased and then decreased the average Nusselt number and friction coefficient.Increasing truss rod diameter ratio,truss rod’s included angle and truss rod’s inclination angle made the comprehensive thermal coefficient first increase and then decrease.When truss rod diameter ratio was 0.0750,truss rod’s included angle was 60°and truss rod’s inclination angle was 33.79°,the heat transfer performance of the channel reached the best.When truss rod diameter ratio was 0.067,truss rod’s included angle was 37.88°and truss rod’s inclination angle was 31.36°,the comprehensive thermal performance of the channel was the best.

关 键 词：桁架阵列 冷却通道 流动与传热 响应面法 优化设计 

分 类 号：V233.5[航空宇航科学与技术—航空宇航推进理论与工程] TK47[动力工程及工程热物理—动力机械及工程]