摘要
为探究同心双扭旋元件对换热管传热特性的影响规律,采用数值模拟方法对Re=200~1800范围内恒壁温条件下的管内传热进行了分析。研究结果表明:同心双扭旋元件换热管的Nu明显高于窄边扭旋元件换热管,但与中空扭旋元件进行对比,Nu变化并不明显;同心双扭旋元件换热管的f明显大于中空扭旋元件及窄边扭旋元件;同心双扭旋元件换热管的PEC值略低于中空扭旋元件换热管,但高于窄边扭旋元件换热管,且同心双扭旋元件换热管的PEC值均大于1。
In order to explore the influence of concentric double-twisted elements on the heat transfer characteristics of heat exchange tubes,a numerical simulation method was used to analyze the heat transfer in the tube under the condition of constant wall temperature in the range of Re=200~1800.The results showed that the Nu of the concentric double-twisted element heat exchange tubes was significantly higher than that of the narrow-side twisted-element heat exchange tubes,but compared with the hollow twisted element heat exchange tube,the Nu change was not obvious;f was significantly larger than the hollow twisting element and narrow-side twisting element;the PEC value of the concentric double twisting element heat exchange tube was slightly lower than the hollow twisting element heat exchange tube,but higher than the narrow-side twisting element heat exchange tube.The PEC values of the heat exchange tubes with the concentric double twisting elements were all bigger than 1.
作者
张傲宇
丁桂彬
王宗勇
ZHANG Ao-yu;DING Gui-bin;WANG Zong-yong(School of Energy and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China)
出处
《当代化工》
CAS
2021年第1期229-232,共4页
Contemporary Chemical Industry
基金
辽宁省自然科学基金(项目编号:201502148)
关键词
同心双扭旋元件
传热性能评价因子
数值模拟
Concentric double twisted element
Heat transfer performance evaluation factor
Numerical simulation
作者简介
张傲宇(1995-),男,辽宁省沈阳市人,硕士,研究方向:化工过程强化。E-mail:462225359@163.com;通讯作者:王宗勇(1973-),男,辽宁省辽阳人,教授,博士,研究方向:化工过程强化及流体动力学。E-mail:1427624386@qq.com。
