Browse > Article
http://dx.doi.org/10.9726/kspse.2012.16.3.029

Computational Flow Analysis on the Flow Field Improvement of an Indoor RAC by LES  

Kim, J.K. (Department of Power System Engineering, KunSan National University)
Oh, S.H. (School of Mechanical & Automative Engineering, KunSan National University)
Publication Information
Journal of Power System Engineering / v.16, no.3, 2012 , pp. 29-36 More about this Journal
Abstract
The computational flow analysis using LES technique was introduced to investigate the flow field improvement of an indoor RAC chassis consisting of a rear-guider, a stabilizer and a cross-flow fan. This unsteady three-dimensional numerical analysis was carried out by the commercial SC/Tetra software. The edge blocks were adopted in this study as a tool for the flow field improvement of an indoor RAC. In view of the results so far achieved, the edge blocks cause the center of an eccentric vortex to be stable along all length of a cross-flow fan, and then, the static pressure and the velocity vector show a stable distributions. In consequence, because the edge blocks eliminate a reverse flow near the edges, an exhausting flow becomes to be stable and uniform.
Keywords
Computational Flow Analysis; Cross-Flow Fan; Eccentric Vortex; Edge Block; Large Eddy Simulation(LES); Rear-Guider; Room Air-Conditioner(RAC); Stabilizer;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
연도 인용수 순위
1 H. Tsurusaki et al., 1993, "Study of Cross-Flow Fan Internal Flow by Flow Visualization (1st Report, Discussion of Measured Results by Particle-Tracking Velocimetry)", Trans. of JSME (Series B), Vol. 59, No. 568, pp. 3743-3748.   DOI
2 H. M. Koo, 1999, "An Experimental Study on the Influences of Some Basic Design Parameters on the Performance Characteristics of the Cross-Flow Fan System in Air-Conditioner", Trans. of KSME (Part B), Vol. 23, No. 6, pp. 695-702.
3 J. K. Kim and K. J. Jeong, 2005, "Study on the Aerodynamic Performance of a Cross-Flow Fan for the Various Design Factors of an Indoor Room Air-Conditioner", J. of KSPSE, Vol. 9, No. 3, pp. 33-38.   과학기술학회마을
4 Y. Cho, Y. J. Moon and S. W. Jin, 1999, "Numerical Prediction of Cross-Flow Fan Performance and Noise Characteristics by Unsteady Flow Computations)", Proc. of KSME Spring Annual Meeting, pp. 417-422, KSME 99S234.
5 M. K. Chung, S. W. Jin and K. S. Cho, 2001, "A Numerical Analysis of Split Type RAC Indoor Unit and Its Application to Design", Proc. of SAREK 2001 Summer Annual Meeting, pp. 1038-1042, 2001-S-177.
6 N. K. Hur, W. Kim and S. H. Kang, 1999, "A Numerical Study on Flow through a Cross Flow Fan : Effect of Blade Shapes on Fan Performance", J. of Fluid Machinery, Vol. 2, No. 1, pp. 96-102.   과학기술학회마을
7 J. K. Kim and S. H. Oh, 2010, "Computational Flow Analysis of a Cross-Flow Fan by LES", J. of KSPSE, Vol. 14, No. 6, pp. 20-28.   과학기술학회마을
8 SC/Tetra(Version 7), 2007, User's Guide, Software Cradle Co., Ltd.
9 K. S. Yang, 1995, "Improvement on Large- Eddy Simulation Technique of Turbulent Flow", Trans. of KSME, Vol. 19, No. 7, pp. 1691-1701.   과학기술학회마을
10 D. S. Jang, Y. W. Lee, D. H. Doh, D. S. Bae and N. S. Kim, 2000, "Numerical Analysis on Flow Field Around a Bluff Body by LES(I)", J. of KSPSE, Vol. 4, No. 3, pp. 40-47.   과학기술학회마을
11 A. M. Porter and E. Markland, 1970, "A Study of the Cross Flow Fan", Journal Mechanical Engineering Science, Vol. 12, No. 6, pp. 421-431.   DOI
12 A. Toffolo, A. Lazzaretto and A. D. Martegani, 2004, "An Experimental Investigation of the Flow Field Pattern within the Impeller of a Cross-Flow Fan", Experimental Thermal and Fluid Science, article in press.