结构参数对内螺纹管湍流传热影响的分析  

Analysis of the influence of structural parameters on turbulent heat transfer of internally finned tube

作　　者：张定才 闫晓婷 黄军亚 王长通 梁冰 ZHANG Dingcai;YAN Xiaoting;HUANG Junya;WANG Changtong;LIANG Bing(School of Energy and Environment,Zhongyuan University of Technology,Zhengzhou 450007,China;Editorial Department of the Journal,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中原工学院能源与环境学院,河南郑州450007 [2]中原工学院学报编辑部,河南郑州450007

出　　处：《中原工学院学报》2023年第3期46-52,共7页Journal of Zhongyuan University of Technology

基　　金：中国纺织工业联合会指导性计划项目(2022065);河南省科技攻关项目(202102310550);河南省高等学校重点科研项目(20A470018);河南省高等学校供热空调重点学科开放实验室基金项目(2015HAC203)。

摘　　要：为提高内螺纹管换热效率,采用Fortran语言编程,以水为介质(其Pr=5.42),对在雷诺数Re=20000~60000、螺旋角α=15~45°、齿高E=0.20~0.60 mm、齿条数Ns=20~52条件下,内螺纹管内流体周期性充分发展的湍流传热性能进行了研究。通过分析雷诺数Re、螺旋角α、齿高E、齿条数Ns的变化对努赛尔数Nu的影响,以及Nu关于Re的指数关系变化,得出了在研究范围内增大Re、α、E、Ns,均可提高内螺纹管换热能力的结论。其中螺旋角α对内螺纹管传热性能的影响最为明显,而齿条数Ns的增大对内螺纹管传热性能的影响并不显著。In order to enhance the heat transfer efficiency of the internal threaded pipe,Using Fortran programming simulation,with water(Pr=5.42)as the medium,the turbulent heat transfer performance of fluid in an internal threaded tube with periodic full development under the conditions of Reynolds number Re=20000~60000,helix angleα=15~45°,fin height E=0.20~0.60 mm,fin number Ns=20~52 was studied.The effects of changes in Reynolds number Re,helix angleα,fin height E and fin number Ns on Nusselt number Nu were analyzed,and the exponential relation change of Nu with respect to Re was obtained,it was concluded that the heat transfer capacity of inner threaded tubes could be improved by increasing Re,α,E and Ns.Among them,the helix angleαhas the significant impact effect on the flow heat transfer of the internal threaded tube,while the increase of the fin number Ns has no a negligible effect on the heat transfer of the internal threaded tube.

关 键 词：内螺纹管 强化传热 努赛尔数 

分 类 号：TK124[动力工程及工程热物理—工程热物理]