不同错开位置的锯齿翅片的热力特性研究

Heat Transfer Performance of Offset Strip Fins with Variable Staggered Strip Positions

作者认为，对于锯齿翅片传热表面，除了高度、节距及切口长度等重要结构参数以外，还应研究“切口的错开位置”这一结构参数对传热与阻力的影响问题。为此，作者对４种错开位置不同的锯齿翅片，按２组不同的高度，做成８种试验件，应用瞬态法（在建立瞬态理论模型时，考虑了纵向和横向导热的问题，同时采用了不同于选点配比法和间接配比法的全程直接配比法）进行了试验研究，得出了每种翅片的传热特性准则关系式，并在实验的基础上，对错开位置与传热特性的关系问题进行了整理和分析。本研究结果为继续深入研究锯齿翅片几何结构参数的影响及其在工程上的应用问题提供了有益的参考。

The offset strip fin(OSF),an enhanced heat transfer surface,is widely used in high efficiency compact heat exchangers.Many experimental investigations have investigated the influence of its major geometric features,such as the fin height,transverse spacing,strip length and fin thickness,on the heat transfer and flow friction characteristics.In addition,the effect of the OSF“Staggered Strip Position(SSP)”on the heat transfer should also be considered.In present work,two different OSF fin heights,each with four kinds of SSPs,were investigated experimentally by the transient testing technique.Correlations for the eight fin arrangements were proposed in terms of j=CRe m from the experimental results.The effect of staggered strip position on the heat transfer performance was also analyzed experimentally.