摘要
设计了一系列具有不同尺寸扰流柱的人字形板式换热器,基于COMSOL软件研究其传热效率。应用了冷热双通道模型,并创新性的提出了在人字形纹波中间添加空心的扰流柱。通过数值模拟方法研究了冷热双通道模型中的多物理场(流体流动和温度)。仿真结果表明,扰流柱可以减小通道两侧速度较小的流动区域,从而使温度传递更加均匀。此外,内置扰流柱的通道出口处的压力损失很小。为了进一步降低压力损失,可以在出口处不设置扰流柱。同时,与传统板片相比,内置扰流柱板片可将传热效率提高3%。
A series of plate heat exchangers with different sizes of pin-fin rows were designed to study their heat transfer efficiency with the COMSOL software.The hot and cold dual-channel model is applied and hollow pin-fin rows are innovatively added to ripples.Multiphysics(fluid flow and temperature)in the hot and cold dual-channel model is studied by numerical simulation method.The simulation results show that at a slow speed,the pin-fin rows can reduce the area on both sides of the channel,thus transferring the temperature more uniformly.Furthermore,the pressure at the outlet of the channel with the pin-fin rows did not change much.To reduce pressure loss,the pin-fin rows should not be installed at the outlet.The simulation results also show that the pin-fin rows can increase the heat transfer efficiency by 3% compared with the traditional plate.
作者
刘凯
付婷
曾良才
汪朝晖
LIU Kai;FU Ting;ZENG Liangcai;WANG Zhaohui(School of Mechanical Automation,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《机械科学与技术》
CSCD
北大核心
2021年第12期1829-1835,共7页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51605345,51975425,51875419)。
关键词
板式换热器
冷热双通道
扰流柱
数值模拟
plate heat exchanger
hot and cold dual-channel model
pin-fin row
numerical simulation
作者简介
刘凯(1995-),硕士研究生,研究方向为流体传热,lkai614@163.com;通信作者:付婷,副教授,硕士生导师,futing1234gh@wust.edu.cn。
