翼型肋片印刷电路板式换热器内超临界甲烷的流动与换热性能  

Flow and heat transfer performance of supercritical methanein an airfoil fin printed circuit heat exchanger

作　　者：兰志向 李伟 刘鹏云 赵乾 刘纳 郭健翔[1] 魏业欣 于永强 梁茂冰 LAN Zhixiang;LI Wei;LIU Pengyun;ZHAO Qian;LIU Na;GUO Jianxiang;WEI Yexin;YU Yongqiang;LIANG Maobing(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266525,China;Shandong Ludong Road and Bridge Co,Dongying Transportation Development Group,Dongying 257091,China)

机构地区：[1]青岛理工大学环境与市政工程学院,青岛266525 [2]东营交通发展集团山东鲁东路桥有限责任公司,东营257091

出　　处：《青岛理工大学学报》2024年第4期80-90,共11页Journal of Qingdao University of Technology

基　　金：国家自然科学基金资助项目(51904325)。

摘　　要：针对超临界甲烷在翼型肋片印刷电路板式换热器内的流动和换热性能开展了数值模拟。对比了6种不同型号NACA00 XX翼型肋片的流动和换热性能;研究了翼型肋片均匀分布时,交错、垂直和水平间距3种布局参数对流动和换热性能的影响;设计了3种前疏后密和3种前密后疏的不均匀分布形式的翼型肋片,将流动和换热性能与均匀分布的进行了对比分析。结果表明:NACA0025翼型肋片的综合性能最佳;翼型肋片均匀分布时,无量纲交错间距和无量纲垂直间距分别为1和4时综合性能最佳;翼型肋片非均匀分布时,前密后疏分布的综合性能优于均匀分布的,而前疏后密分布的综合性能劣于均匀分布的;保持翼型肋片数量不变,在拟临界点附近布置更密的翼型肋片能够强化综合性能。Numerical simulation was carried out to investigate the flow and heat transfer performance of the supercritical methane in an airfoil fin printed circuit heat exchanger(PCHE).The flow and heat transfer performance of six different types of NACA00 XX airfoil fins were compared and analyzed.The effects of three layout parameters,namely staggered pitch,vertical pitch and horizontal pitch,on the flow and heat transfer performance when the airfoil fins are uniformly distributed were investigated.Three forms of front dense and rear sparse and three forms of front sparse and rear dense non-uniform distributions of airfoil fin were proposed,and their flow and heat transfer performance were compared with that of the uniform distribution.The results show that NACA0025 airfoil fins offer the best comprehensive performance.When the airfoil fins are uniformly distributed,and when the dimensionless staggered pitch and dimensionless vertical pitch are 1 and 4 respectively,the comprehensive heat transfer performance is the best.When the airfoil fins are non-uniformly distributed,the comprehensive performance of front dense and rear sparse distributions is better than that of the uniform distribution,while the comprehensive performance of front sparse and rear dense distributions is lower than that of the uniform distribution.The comprehensive heat transfer performance can be enhanced by arranging denser airfoil fins near the quasi-critical point for keeping the number of airfoil fins constant.

关 键 词：印刷电路板式换热器 翼型肋片 换热 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]