摘要
针对管壳式换热器折流板背部存在流动死区的问题,对换热器壳程折流板的结构进行优化,并且通过数值模拟分别研究了折流板开圆孔和锥形孔对低温油封冷却器换热性能和压降的影响.数值模拟结果表明,当壳程入口速度低于1.3 m/s,折流板开圆孔更有利于减小折流板背部流动死区,改善冷却器壳程的强化传热性能;当壳程入口流速大于2 m/s时,折流板开锥形孔更有利于冷却器壳程的强化传热.折流板开圆孔和锥形孔均有利于减小冷却器壳程压降,两者对压降的影响无明显差别.
Aiming at the shell-and-tube heat transfer existing stagnant zones at the back of baffle,we optimizedthe structure of the baffle in shell-side of the heat exchanger,and studied the effects of the baffle with round andtaper hole on the performance of heat transfer and pressure-drop of the low-temperature oil seal cooler by numeri-cal simulation respectively.Result shows that the baffle with round hole is more conductive to reduce stagnantzones at the back of baffle and improve the performance of heat transfer of the cooler when the velocity ofshell-side entrance is less than 1.3 m/s;and the baffle with taper hole is more advantageous to enhance the heattransfer of the cooler when the velocity of shell-side entrance is more than 2 m/s.Moreover,the baffles withround and taper hole are beneficial to reduce the pressure-drop of shell-side with almost the same effects.
出处
《武汉工程大学学报》
CAS
2016年第4期394-398,共5页
Journal of Wuhan Institute of Technology
基金
武汉工程大学研究生创新基金资助项目(CX2015026)
关键词
冷却器
折流板开孔
结构优化
强化传热
数值模拟
cooler
perforated baffle
structure optimization
enhancement of heat transfer
numerical simulation
