双向开缝翅片椭圆管空冷器传热与阻力性能数值模拟研究

Numerical Simulation Research on Heat Transfer and Resistance Performance of Bidirectional Slotted Fin Elliptical Tube Air Cooler

摘要: 基于双向开缝翅片双排椭圆管空冷器模化试验研究，建立了双向开缝翅片四排椭圆管空冷器的物理模型，对其传热与阻力性能进行了数值模拟研究。结果表明：相同雷诺数下，连桥S型开缝方式的空冷器具有最大的空气侧努塞尔数Nu_a；空冷器空气侧努塞尔数Nu_a和空气侧欧拉数Eu_a均随相对横向管间距S₁/b的减小而增大；空冷器空气侧努塞尔数Nu_a随相对纵向管间距S₂/a的减小而增大，空气侧欧拉数Eu_av的变化较小。研究结果可为双向开缝翅片椭圆管空冷器传热与阻力性能的进一步优化提供参考。

Abstract: Based on the simulation test study of the two-row elliptical tube air cooler with two-way slotted fins, a physical model of the four-row elliptical tube air cooler with two-way slotted fins was established, and its heat transfer and resistance performance were numerically simulated. The results show that: under the same Reynolds number, the air cooler with the bridge S-slit mode has the largest air side Nusselt number Nu_a; the air side Nusselt number Nu_a and air side Euler number Eu_a of the air cooler both increase when the relative transverse tube spacing S₁/b decreases. The air side Nusselt number of the air cooler increases with the decrease of the relative longitudinal tube spacing, and the air side Euler number changes less. The research results can provide a reference for the further optimization of the heat transfer and resistance performance of the two-way slotted elliptical tube air cooler.