扭转圈数对内置齿状螺旋元件换热管传热性能的影响  

Effect of the Number of Torsion Turns on the Heat Transfer Performance of Heat Exchanger Tubes with Built-In Toothed Spiral Elements

作　　者：田赫[1] 叶函宇 张清官 孙铭 TIAN He;YE Hanyu;ZHANG Qingguan;SUN Ming(Shenyang University of Chemical Technology,Shenyang Liaoning 110142,China)

机构地区：[1]沈阳化工大学,辽宁沈阳110142

出　　处：《辽宁化工》2024年第12期1959-1963,共5页Liaoning Chemical Industry

摘　　要：提出一种新型内置齿状螺旋元件换热管,应用Fluent软件对在低雷诺数下内置齿状螺旋元件换热管内的单液相中速度场和温度场进行数值模拟,探究其强化传热机理,并探讨了不同扭转圈数对换热管传热性能的影响。结果表明:所提出的内置齿状螺旋元件换热管相比于现有研究的传统强化传热元件的效率有所提高,在低雷诺数状态下随着扭转圈数Q的增加,截面内速度和温度均匀性增加,换热管内流体的努塞尔数Nu和阻力系数f也随之提升。综合传热性能方面,PEC值均大于1,在Q=3.0的情况下换热管的传热性能最好,PEC值达到1.416。A new type of heat exchanger tube with built-in toothed helical element was proposed,and numerical simulations of velocity and temperature fields in the single liquid phase inside the heat exchanger tube with built-in toothed helical element were carried out by applying Fluent software at low Reynolds number to investigate the mechanism of its enhanced heat transfer,and the effects of different numbers of torsion turns on the heat transfer performance of the tube were also explored.The results showed that the efficiency of the heat exchanger tube with built-in toothed helical elements proposed in this paper was improved compared with the conventional enhanced heat transfer elements in the existing studies,and the Nussell number Nu and drag coefficient f of the fluid inside the heat exchanger tube were also enhanced in the low Reynolds number state with the increase of the number of twisted turns Q,which increased the uniformity of the velocity and temperature in the cross-section.For the integrated heat transfer performance,the PEC values were all greater than 1.The heat transfer performance of the heat exchanger tube was best when Q=3.0 with the PEC value of 1.416.

关 键 词：数值模拟 扭转圈数 传热性能 PEC值 

分 类 号：TQ021.3[化学工程]