It is found that the fluid flow maldistribution is very serious for conventional header while the improved header configuration with punched baffle can effectively improve the performance.

• 实验结果表明，原始封头内部的物流分配存在严重的不均匀性，采用添加打孔挡板之后的改进型封头，流场的不均匀性有了很大的改善。