间断环面槽翅片管换热器传热与阻力性能数值模拟研究

Numerical Simulation Study on Heat Transfer and Resistance Performance of Intermittent Annular Groove Finned Tube Heat Exchanger

通过模化试验与数值模拟的方法,来研究翅片间距Pf、开槽位置(上游环面槽周向中线半径Rs、下游环面槽周向中线半径Rx)以及开槽角度(环面槽的弧角θ)对间断环面槽翅片的传热与阻力性能的影响规律。研究结果表明:Re=1000~8200时,翅片侧Nu随着Re的增大而增大;Eu随着Re的增大而减小;翅片侧Nu随着Pf的减小而增大;Eu随着Pf的增大而减小;翅片侧Nu随着Rs的增大而增大;Eu随着Rs的增大而增大;翅片侧Nu随着Rx的减小而减小;Eu随着Rx的减小而减小;翅片侧Nu随着θ的增大而增大;在Re较低时,Eu随着θ的增大而增大;在Re较高时,θ对换热器翅片侧阻力的影响不大。

The effects of fin spacing(Pf),upper torus groove radius(Rs),lower torus groove radius(Rx),and slot angle(θ)on heat transfer and resistance of discontinuous torus groove fins were studied by modeling test and numerical simulation.The results showed that when Re=1000~8200,Nu on the fin side increased with the increase of Re.Eu decreases with the increase of Re.The Nu on the fin side increases with the decrease of Pf.Eu decreases with the increase of Pf.The Nu on the fin side increased with the increase of Rs.Eu increases with the increase of Rs.Nu on the fin side decreased with the decrease of Rx.Eu decreases with the decrease of Rx;The Nu on the fin side increases with the increase ofθ.When Re is low,Eu increases with the increase ofθ.When Re is high,θhas little effect on the side resistance of heat exchanger fins.