本文应用三维数值模拟对半球突开缝翅片的传热与流动特性进行研究,并利用(火积)耗散理论对其传热机理进行分析.计算结果表明:与平片相比,半球突开缝翅片的传热性能提高24.06％～67.73％,综合性能(j/f1/3)提高7.55％～23.88％,换热效果明显好于平片.通过(火积)耗散理论分析显示:半球突开缝翅片的等效热阻小,换热的不可逆程度较低,因而换热性能较好.
参考文献
| [1] | G. I. Mahmood;P. M. Ligrani .Heat transfer in a dimpled channel: combined influences of aspect ratio, temperature ratio, Reynolds number, and flow structure[J].International Journal of Heat and Mass Transfer,2002(10):2011-2020. |
| [2] | Chang SW;Chiang KF;Yang TL;Huang CC .Heat transfer and pressure drop in dimpled fin channels[J].Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics,2008(1):23-40. |
| [3] | S. A. Isaev;N. V. Kornev;A. I. Leontiev;E. Hassel .Influence of the Reynolds number and the spherical dimple depth on turbulent heat transfer and hydraulic loss in a narrow channel[J].International Journal of Heat and Mass Transfer,2010(1/3):178-197. |
| [4] | 樊菊芳,何雅铃,陶文铨.球突翅片表面的数值模拟和特性分析[J].工程热物理学报,2008(11):1921-1923. |
| [5] | Mohammad A. Elyyan;Danesh K. Tafti .A novel split-dimple interrupted fin configuration for heat transfer augmentation[J].International Journal of Heat and Mass Transfer,2009(5/6):1561-1572. |
| [6] | Zeng-Yuan Guo;Hong-Ye Zhu;Xin-Gang Liang .Entransy—A physical quantity describing heat transfer ability[J].International Journal of Heat and Mass Transfer,2007(13/14):2545-2556. |
| [7] | CHEN Qun,REN JianXun.Generalized thermal resistance for convective heat transfer and its relation to entransy dissipation[J].科学通报（英文版）,2008(23):3753-3761. |
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