低温油封冷却器的结构优化及数值模拟

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.

Structure Optimization and Numerical Simulation of Low-Temperature Oil Seal Cooler

Aiming at the shell-and-tube heat transfer existing stagnant zones at the back of baffle， we optimized the structure of the baffle in shell-side of the heat exchanger， and studied the effects of the baffle with round and taper hole on the performance of heat transfer and pressure-drop of the low-temperature oil seal cooler by numerical simulation respectively. Result shows that the baffle with round hole is more conductive to reduce stagnant zones at the back of baffle and improve the performance of heat transfer of the cooler when the velocity of shell-side entrance is less than 1.3 m/s； and the baffle with taper hole is more advantageous to enhance the heat transfer of the cooler when the velocity of shell-side entrance is more than 2 m/s. Moreover， the baffles with round and taper hole are beneficial to reduce the pressure-drop of shell-side with almost the same effects.