本文采用非定常三维Navier-Stokes方程、κ-ε两方程模型分析了贯流风机内部旋涡产生、发展、耗散、消失的演化过程.数值模拟显示:偏心涡产生于进气侧,随后横穿叶轮内部朝出气侧移动,最后位于出气侧叶片内圆周上.叶轮外圆周脱落的旋涡是不稳定的,它们互相融合,最后被吸入叶轮内部.数值模拟的结果显示偏心涡先于贯流而产生,是由于偏心涡的存在导致了贯流的产生,并非贯流形成了偏心涡.本文证实了ECK的旋涡理论和文献[3]的实验结果.
参考文献
| [1] | Beck.Ventilatoren[J].Springer-Vetlag,1962 |
| [2] | A M Porter;E Markland .A Study of the Cross Flow Fan[J].Journal of Mechanical Engineering Science,1970,12(06):421-431. |
| [3] | Kazuo Yamafuji Studies on the Flow of Cross-Flow hnpellers (1st Report, Experimental Study)[J].Bulletin of the JSME,1975(18):1018-1025. |
| [4] | Kazuo Yamafuji .Studies on the Flow of Cross-Flow Immpellers (2nd Report, Analytical Study)[J].Bulletin of the JSME,1975(18):1425-1433. |
| [5] | Susumu Murata;Kazuyoshi Nishihara .An Experimental Study of Cross Flow Fan (2nd Report, Movements of Eccentric Vortex Inside Impeller)[J].Bulletin of the JSME,1976(19):314-329. |
| [6] | T Fukano;Y Hara;Y Yamashita.Experintental Study on Cross-Flow Fan Noise[A].,1993:45-50. |
| [7] | Y Yoshida;H Tazuke;Hirofumi S et al.Study of Cross-Flow Fan Internal Flow by Flow Visualization(2nd Report, Mechanism of Balance of Eccentric Vortex Strength)[J].JSME International Journal Series B:Fluids and Thermal Engineering,1994(60):96-103. |
| [8] | L.Lazzarotto;A.Lazzaretto;A.D.Martegani;A.Macor .On Cross-Flow Fan Similarity: Effects of Casing shape[J].Journal of Fluids Engineering: Transactions of the ASME,2001(3):523-531. |
| [9] | You Bin;E Elhadi;Wu Keqi.Numerical Analysis of Three Dimensional Flow in Cross-Flow Fan[A].北京,2002:334-341. |
| [10] | Shigeru Akaike;Motohiro Kitada;Hitoshi T et al.Internal Flow and Fan Characteristics of Cross-Flow Fan[J].JSME International Journal Series B:Fluids and Thermal Engineering,1997(83):583-589. |
| [11] | Laboratory Methods of Testing Fan for Rating.ANSI/AMCA 210-85standard, ANSI/ASHRAE 51-1985Standard[Z].,1985. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%