倾斜布置去湿翅片热交换器传热性能研究

EXPERIMENTAL STUDY ON HEAT TRANSFER CHARACTERISICS FOR DEHUMIDIFYING FIN-AND-TUBE HEAT EXCHANGER INCLINED TO COMING FLOW

对两种类型的整体式翅片管热交换器（正弦波纹形和开缝翅片），在倾斜布置的情况下，测定了湿工况条件下的换热和阻力性能。着重讨论了冲击角为９０、６０、４５和３０（°）时，翅片间距和析湿系数对翅片表面的换热和阻力影响，最后，得出与冲击角、雷诺数和析湿系数等因素有关的换热和阻力综合关联式，以及对工程设计有用的一些结论。

The heat transfer and pressure drop characteristics of dehumidifying plate fin-and-tubeheat exchangers of two types of fin surfaces(sinusoidal and slotted ) inclined to oncomingflow were investigated. The inclined angle between the tube axis and the oncoming flow var-ied from 90°to 60°,45°and 30°,The influences of the fin pitch, dehumidifying coefficient, andinclined angle on the heat transfer characteristics were discussed. General correlations relat-ed to the Nusselt number(friction factor)and the inclined angle,Reynolds number and dehu-midifying factor were obtained which should be useful for engineering design。