本文首先对“common flow down”(A形式)和“common flow up”(B形式)两种形式纵向涡发生器的流动换热性能进行了计算比较,发现B形式纵向涡发生器Nu数比A形式纵向涡发生器在计算范围内平均增大2.8％,而f因子却平均减少9.1％,这表明B形式纵向涡发生器是一种性能更加优异的强化传热表面方式;考察了B形式纵向涡发生器的几何参数对流动换热性能的影响,结果表明B形式纵向涡发生器空气侧Nu数与f因子随着攻角减小、高度hVG增大、xVG减小、yVG减小而增大,而随着长度lVG的增大Nu数先增大后减小,同样f因子随着长度lVG的增大也先增大后减小.
参考文献
| [1] | K. Torii;K. M. Kwak;K. Nishino .Heat transfer enhancement accompanying pressure-loss reduction with winglet-type vortex generators for fin-tube heat exchangers[J].International Journal of Heat and Mass Transfer,2002(18):3795-3801. |
| [2] | LING-HONG TANG;ZENG MIN;GONG-NAN XIE;QIU-WANG WANG .Fin Pattern Effects on Air-Side Heat Transfer and Friction Characteristics of Fin-and-Tube Heat Exchangers with Large Number of Large-Diameter Tube Rows[J].Heat Transfer Engineering,2009(3):171-180. |
| [3] | L.H. Tang;M. Zeng;Q.W. Wang .Experimental and numerical investigation on air-side performance of fin-and-tube heat exchangers with various fin patterns[J].Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics,2009(5):818-827. |
| [4] | J.M. Wu;H. Zhang;C.H. Yan;Y. Wang.Experimental study on the performance of a novel fin-tube air heat exchanger with punched longitudinal vortex generator[J].Energy conversion & management,2012:42-48. |
| [5] | M. Zeng;L. H. Tang;M. Lin;Q. W. Wang .Optimization of heat exchangers with vortex-generator fin by Taguchi method[J].Applied thermal engineering: Design, processes, equipment, economics,2010(13):1775-1783. |
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