错齿翅片的传热与阻力性能试验

The Flow and Heat Transfer in Compact Offset Strip Fin Surfaces

对9种不同结构参数的错齿翅片进行传热和流动阻力性能试验,分析比较翅片的间距、高度和节距等结构参数对其传热因子和阻力性能的影响.同时,利用场协同原理揭示错齿翅片强化传热的机理,并采用单位面积泵功率的评价方法,比较9种翅片的强化传热效果.结果表明,错齿翅片的节距和长度对其热工性能影响最为显著.

Experimental studies on the air-side heat transfer and pressure drop characteristics for offset strip fins were performed. A series of tests were conducted for nine heat exchangers with different fin space, fin height, fin length and flow length. The characteristics of the heat transfer and pressure drop for different geometry parameters were analyzed and compared. In addition, the curves of the heat transfer coefficients vs the pumping power per unit frontal area were plotted. Moreover, the enhancement heat transfer mechanism of offset strip fins was analyzed by the field synergy theory. The results show that fin length and flow length have more obvious effect on the thermal hydraulic characteristics of offset strip fins.