强化换热管冷却壁传热分析及结构优化  

Study on Heat Transfer Analysis and Structural Optimization of the Cooling Stave for Enhanced Heat Exchange Tubes

作　　者：徐迅[1] 吴俐俊[2] XU Xun;WU Lijun(Xinglin College,Nantong University,Nantong Jiangsu 226000,China;School of Mechanical Engineering,Tongji University,Shanghai 20l804,China)

机构地区：[1]南通大学杏林学院,江苏南通226000 [2]同济大学机械与能源工程学院,上海201804

出　　处：《湖南工业大学学报》2024年第4期13-19,共7页Journal of Hunan University of Technology

基　　金：国家自然科学基金资助项目(51574179);江苏省高校“青蓝工程”基金资助项目(苏教师函[2021]11号)。

摘　　要：强化冷却水管的换热,对提高冷却壁的传热性能、延长冷却壁使用寿命有重要意义。利用Fluent数值模拟研究了丁胞管、螺纹管、扭曲椭圆管3种强化换热管对冷却壁换热性能的影响,并对强化换热管结构参数进行了优化,建议丁胞管结构参数设定如下:丁胞纵向间距为40 mm,径向丁胞数为4,丁胞半径为2 mm;螺纹管结构参数设定肋条数为4,肋高为1 mm,肋宽为5~7 mm,导程为25~40 mm;扭曲椭圆管结构参数设定导程不大于100 mm,短长轴之比取0.4~0.6。对比分析实验结果表明:螺纹管和扭曲椭圆管对冷却壁强化换热效果较好,丁胞管较差,扭曲椭圆管可以在水管压力损失较小下实现较好的强化换热效果。Strengthening the heat exchange of cooling water pipes is of great significance for improving the heat transfer performance of cooling staves and extending their service life.By adopting a Fluent numerical simulation,a research has thus been conducted on the effect of three types of enhanced heat transfer tubes,namely,dimple tubes,threaded tubes,and twisted elliptical tubes,on the heat transfer performance of the cooling stave,followed by an optimization of the structural parameters of the enhanced heat transfer tubes.It is suggested that the structural parameters of the dimple tubes be set as follows,the longitudinal spacing of the dimple tubes being 40 mm,the radial number of dimples being 4,and the dimple radius being 2 mm,the set structural parameters of the threaded tube being 4 ribs,with a rib height of 1mm,a rib width of 5~7 mm,and a lead of 25~40 mm.The structural parameter of the twisted elliptical tubes should be set with a lead not exceeding 100 mm,with the short to long axis ratios between 0.4 and 0.6.Comparative analysis of experimental results shows that threaded tubes and twisted elliptical tubes are characterized with a better heat transfer enhancement effect on cooling staves,while dimple tubes are poorer in performance.Twisted elliptical tubes can achieve better heat transfer enhancement effects at the cost of smaller water pipe pressure loss.

关 键 词：冷却壁 强化换热管 数值模拟 结构优化 

分 类 号：TK172[动力工程及工程热物理—热能工程]