板翅式换热器导流片结构参数对其导流性能的影响

由于板翅式换热器结构的复杂性，存在着内部流动速度分布的不均匀性，从而引起其换热效率下降，影响了换热器的整体效能.引起流动速度分布不均匀的因素是多方面的，针对不同导流片结构参数（h/H）对导流片导流性能的影响进行了深入研究，发现导流片结构参数对换热器内部流动速度分布不均匀性的影响主要表现在总管流动方向上，通过改变板翅式换热器导流片的结构参数可有效地改善换热器内部物流在总管流动方向上的分配情况，从而有效地改善换热器内部流动速度的分布.研究结果对板翅式换热器的优化设计具有重要意义.

EFFECTS OF DIFFERENT DISTRIBUTOR CONFIGURATION PARAMETERS ON FLUID FLOW DISTRIBUTION IN PLATE-FIN HEAT EXCHANGER

Flow maldistrbution exists in plate-fin heat exchanger du e to its complicated interior structure and it would cause the deterioration of he at exchanger's efficiency.Many factors could cause fluid flow nonuniformity in the plate-fin heat exchanger.The objective of this paper is to investigate the effects of different distributor configuration parameter(h/H) on the flu id flow distribution in plate-fin heat exchanger.It is found that the effect of different distributor's(h/H) on flow maldistribution in plate-fin hea t exchanger mainly exists in the parallel direction of gross flow passage.A chan ge in the distributor's h/H can make the flow distribution more uniform in the parallel direction of gross flow passage.To optimize the configuration o f distributor can effectively improve the flow distribution in plate-fin heat e xchanger.The conclusions of this paper are of great significance in the optimum design of plate-fin heat exchanger.