封头对板翅式换热器流动及阻力特性的影响  

Effect of different improved header on flow and pressuredifference in plate-fin exchangers

作　　者：周爱民[1] 厉彦忠[1] 文键[1] 马岩松[1] 

机构地区：[1]西安交通大学能源与动力工程学院

出　　处：《石油机械》2006年第5期10-13,2,共4页China Petroleum Machinery

基　　金：西安交通大学博士学位论文基金资助项目(DFXJTU2004-02);全国首届优秀博士学位论文作者专项基金资助项目(199933)。

摘　　要：研究了不同Re下3种封头结构对板翅式换热器内部物流分配和阻力分布特性的影响。实验结果表明工业用基本型封头造成板翅式换热器内部物流分配极不均匀,而孔板型封头结构能有效地降低不均匀参数和最大流速比,可极大地改善物流分配的效果,并且随着Re的增大效果越明显;还发现物流分配的不均匀性会导致流动阻力分布更加不均匀。综合研究分析可得封头结构和Re是影响板翅式换热器物流分配和阻力分布特性的重要因素,而错排孔板型封头结构的改善效果最佳。The effect of 3 different header configurations with different Re on the characteristics of internal flow distribution and drag distribution of a plate-fin heat exchanger is investigated. The experiment result indicates that the maldistribution would be caused by the ordinary industrial header for the internal flow of the plate-fin heat exchanger, while the maldistribution parameters and the maximum velocity ratio can be effectively reduced by perforated plate header configuration, the effect of flow distribution can be greatly improved, the effect will be more obvious with the increase of Re. it is also found out that more maldistribution of flow drag would be caused by maldistribution of flow. It is considered that Re is the critical factor influencing the both, while the improvement of staggered perforated plate header configuration is of optimal effect.

关 键 词：孔板型封头结构 板翅式换热器 物流分配 阻力分布 

分 类 号：TK172[动力工程及工程热物理—热能工程] TS33[轻工技术与工程]