带有导流翼的板翅式换热器封头结构优化研究  

Configuration optimization of wing panel header in plate-fin heat exchanger

作　　者：王少华[1] 文键[1] 李亚梅[1] 厉彦忠[1] 王斯民[1] 

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《化学工程》2013年第7期24-28,共5页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(51106119;81100707);教育部博士点基金资助项目(20110201120052)

摘　　要：针对板翅式换热器封头内部流场分布不合理和流道流量不均匀分配的现象,提出了一种新型导流翼封头结构的改造方案。采用CFD方法对该封头结构改进前后的流场进行数值计算与分析,证明了导流翼的应用使换热器封头流道的流量分配的均匀性得到很大改善,使得封头内部流场分布更加合理。模拟研究还发现通过改变导流翼片的安装参数可有效地改善换热器封头内部物流分配特性,当导流翼角为70°、翼片顶端安装距离为6 mm时为最佳导流翼片结构安装参数组合,文中原始模型的模拟结果与相关文献中封头的实验结果数据吻合很好,从而验证了该数值模拟研究中物理模型与数值模型的合理性与准确性,此封头结构的研究结论对板翅式换热器的优化设计具有重要意义。In view of fluid flow mal-distribution, a new-style wing panel with small holds was recommended to be installed in the header in order to improve the performance of flow distribution. The conventional and improved entrance configurations in plate-fin heat exchangers were computed numerically by using computational fluid dynamics （CFD） simulations. It shows that the improved header configuration with punched baffle can effectively improve the uniformity of fluid distribution. The numerical results also demonstrate that flow distribution can be improved by changing the distributor＇s configuration, and there is an optimum dimension when the wing angle is equivalent to 70°, simultaneously the fins distance approximately equals to 6 mm. Compared with the referenced experimental data of original configuration, a good agreement is achieved, which demonstrates the accuracy of the numerical model, and is helpful to the optimum design of plate-fin heat exchanger.

关 键 词：板翅式换热器 封头 导流翼 流量分配 

分 类 号：TK172[动力工程及工程热物理—热能工程]