摘要
研究了带有翼型肋的印刷电路板式换热器(PCHE)在横摇条件下,操作压力和横摇参数对超临界液化天然气(LNG)的流动换热性能的影响。结果表明:PCHE在较低压力条件下具有较好的换热性能,但流动性能较差。瞬时努塞尔数和瞬时达西摩擦阻力系数随时间成准正弦关系,其周期与横摇周期相同。与稳态条件相比,横摇条件下具有更大的时间平均努塞尔数和达西摩擦阻力系数,并且换热性能和流动性能随着横摇幅度和横摇频率的增加而增加。此外,相比于横摇频率,横摇幅度对性能的影响更大。
Thermal and hydraulic performance of supercritical liquefied natural gas(LNG)was numerically studied in a printed circuit heat exchanger(PCHE)with airfoil fins under a rolling condition.Effects of operating pressures and rolling parameters were investigated.The results indicated that the PCHE had better thermal performance but worse hydraulic performance at lower pressure condition.The instantaneous Nusselt numbers and the instantaneous Darcy friction factors presented quasi-sine patterns against time,with a period same as the rolling period.The rolling condition gave larger time-averaged Nusselt numbers and Darcy friction factors,compared with the static condition,and the thermal and hydraulic performance increased with increasing of rolling amplitude and rolling frequency.However,the rolling amplitude had prevailing effect on the performance,in comparison to the rolling frequency.
作者
王抑扬
唐凌虹
辛杰
WANG Yiyang;TANG Linghong;XIN Jie(Xi'an Shiyou University,Xi’an Shaanxi 710000,China)
出处
《当代化工》
CAS
2024年第2期495-499,共5页
Contemporary Chemical Industry
基金
陕西省自然科学基础研究计划项目(项目编号:2023-JC-YB-350)。
关键词
印刷电路板式换热器
翼型
流动换热性能
准临界温度
横摇工况
数值模拟
Printed circuit heat exchanger
Airfoil
Thermal and hydraulic performance
Pseudo-critical temperature
Rolling condition
Numerical simulation
作者简介
王抑扬(1999-),男,陕西省西安市人,硕士研究生,研究方向:强化传热。E-mail:wyyzuoziji@163.com;通信作者:唐凌虹(1979-),男,副教授,博士,研究方向:复杂流体流动和传热强化技术。E-mail:lhtang97@163.com。
