竖直管降膜蒸发器溢流孔式布膜器CFD模拟研究

发布时间：2018-06-30 19:25

本文选题：竖直管 + 溢流孔式　；参考：《北京化工大学学报(自然科学版)》2017年01期

【摘要】：针对某公司在役竖直管降膜蒸发器换热效果不佳的问题,利用计算流体动力学(CFD)方法模拟研究了径向进液、切向进液以及溢流孔上方液位高度对成膜效果的影响,并进行了实验验证。模拟、实验研究发现:流体径向进入布膜器,仅部分流体沿壁面成膜,造成换热面积的有效利用率不足,进而导致蒸发器换热面积有效利用率低;采用切向孔进入布膜器,流体可在换热管壁面均匀成膜;溢流孔上方液位高度300 mm时可保证布膜均匀。
[Abstract]:In view of the problem that the heat transfer effect of a company's vertical tube falling film evaporator is not good, the effect of radial intake, tangent fluid and the height of liquid level above the overflow hole on the film forming effect is simulated by the computational fluid dynamics (CFD) method, and experimental verification is carried out. The simulation and experimental study found that the fluid radial enters the film distributor, only part of it. The effective utilization of the heat transfer area is insufficient and the effective utilization rate of the heat exchange area is low, and the effective utilization rate of the heat exchange area of the evaporator is low. The fluid can be uniformly formed on the wall surface of the heat exchange tube by using the tangential hole, and the film is uniform when the height of the liquid level above the overflow hole is 300 mm above the overflow hole.
【作者单位】：北京化工大学机电工程学院;
【基金】：国家“863”计划(2014AA041806) 中国石油科技创新基金(2015D-5006-0606)
【分类号】：TQ051.62

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