环形波节螺旋管流动与传热特性研究  

Research on flow and heat transfer characteristics of annular corrugated helical tube

作　　者：于三川 李雅侠[1] 张呈杰 王鑫[1] YU Sanchuan;LI Yaxia;ZHANG Chengjie;WANG Xin(School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110000,China)

机构地区：[1]沈阳化工大学机械与动力工程学院,辽宁沈阳110000

出　　处：《石油化工》2023年第9期1256-1261,共6页Petrochemical Technology

基　　金：国家自然科学基金项目(51506133);辽宁省自然科学基金项目(2019MS259);辽宁省教育厅一般项目(LJ2020037)。

摘　　要：提出了一种新型的强化传热装置——环形波节螺旋管,以水为工作介质,采用数值模拟方法研究内部流体在层流状态下的流动与传热特性,并考察了波节间距(H)与波节高度(E)的影响。模拟结果表明,环形波节结构对管内流体周期性的扰动有利于破坏边界层,改善管内速度场与温度场,促进管内流体的混合,实现传热强化,特别是波节弧形段尾端区域强化传热效果显著。与相同尺寸的光滑螺旋管相比,环形波节螺旋管的流动阻力损失有所增加,但综合强化传热效果明显提高,研究范围内,E=2 mm,H=55.5 mm时的综合强化传热效果最佳,综合热性能评价指标最高可达1.19。A new type of enhanced heat transfer device—annular corrugated helical tube is proposed.Using water as the working fluid,the flow and heat transfer characteristics of the internal fluid in the laminar flow state are studied by numerical simulation method,and the effects of corrugation pitch(H)and corrugation height(E)are investigated.The results show that the periodic disturbance of the annular corrugated structure on the fluid in the tube is beneficial to destroy the boundary layer,improve the velocity field and temperature field in the tube,promote the mixing of fluids in the tube,and realize the heat transfer enhancement.Especially,the enhanced heat transfer effect in the end area of the corrugated nodes is remarkable.Compared with the smooth helical tube of the same size,the flow resistance loss of the annular corrugated helical tube is increased,but the comprehensive heat transfer enhancement effect is obviously improved.In the research range,the comprehensive heat transfer enhancement effect is the best when E=2 mm,H=55.5 mm,and the comprehensive thermal performance evaluation index value is up to 1.19.

关 键 词：螺旋管 强化传热 波节管 数值模拟 

分 类 号：TQ018[化学工程]