Browse > Article
http://dx.doi.org/10.6108/KSPE.2012.16.1.025

Improvement of the Aerothermal Environment for a 90° Turning Duct by an Endwall Boundary Layer Fence  

Cho, Jong-Jae (부산대학교 대학원 항공우주공학과)
Kim, Kui-Soon (부산대학교 항공우주공학과)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.16, no.1, 2012 , pp. 25-35 More about this Journal
Abstract
An endwall boundary layer fence technique was adapted to improve the aerothermal environment of a gas turbine passage. The shape optimization of the fence was performed to maximize the improvement. The turbine passage was simulated by a $90^{\circ}$ turning duct (ReD=360,000). The main purpose of the present investigation was to focus on finding a endwall boundary layer fence with minimum total pressure loss in the passage and heat transfer coefficient on the endwall of the duct. Anothor objective function was to minimize the area on the endwall of the duct. An approximate optimization method was used for the investigation to secure the computational efficiency. Results indicated that a significant improvement in aerodynamic environment can be achieved through the application of the fence. Improvement of the thermal environment was smaller than that of the aerodynamic enviroment.
Keywords
Endwall Boundary Layer Fence; Optimization; Secondary Flow; $90^{\circ}$ Turning Duct;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Taylor, A.M.K.P., Whitelaw, J.H. and Yianneskis, M., "Curved Ducts With Strong Secondary Motion: Velocity Measurements of Developing Laminar and Turbulent Flow," ASME Journal of Fluids Engineering, Vol. 104, 1982, pp.350-359   DOI
2 Ko, T. H., "A numerical study on entropy generation and optimization for laminar forced convection in a rectangular curved duct with longitudinal ribs," International Journal of Thermal Sciences, Vol. 45, 2006, pp.1113-1125   DOI   ScienceOn
3 iSIGHT Designer's Guide, Version FD 3.1, Engineous Software, Inc., 2008
4 Gambit I Modeling Guide, Fluent Inc., 2004
5 Fluent User's Guide, Version 6.3, Fluent Inc., 2006
6 Wiedner, B. G. and Camci, C., "Passage Flow Structure and its Influence on Endwall Heat Transfer in a 90° Turning Duct: Mean Flow and High Resolution Endwall Heat Transfer Experiments," Journal of Turbomachinery, Vol. 119, No. 1, 1997, pp.39-50   DOI
7 van Leer, B., "Towards the Ultimate Conser- vative Difference Scheme, V. A Second Order Sequel to Godunov's Method," J. Com. Phys., Vol. 32, 1979, pp.101-136   DOI   ScienceOn
8 Yakhot, V., Orszag, S., Thangman, S., Gatski, T. B. and Speziale, C. G., "Development of Turbulence Models for Shear Flows by a Double Expansion Technique," Physics of fluids. A, Fluid dynamics, Vol. 4, No. 7, 1992, pp.1510-1520   DOI
9 Zess, G. A., and Thole, K. A., "Computational Design and Experimental Evaluation of Using a Leading Edge Fillet on a Gas Turbine Vane," Journal of Turbomachinery, Vol. 124, 2002, pp.167-175   DOI   ScienceOn
10 Kim, S. E. and Choudhury, D. A., "Near-Wall Treatment Using Wall Functions Sensitized to Pressure Gradient," ASME FED, Vol. 217, 1995
11 Iman, R. L., Davenport, J. M. and Zeigler, D. K., "Latin hypercube sampling (program user's guide)," OSTI 5571631., 1980
12 Myers, R. H. and Montgomery, D. C., "Response Surface Methodology - Process and Product Optimization Using Designed Experiments," John Wiley & Sons, New York, 1995
13 Kawai, T., Shinoki, S. and Adachi, T., "Secondary Flow Control and Loss Reduction in a Turbine Cascade Using Endwall Fences," JSME International Journal, Series 11, Vol. 32, No. 3, 1989, pp.375-387
14 Chung, J.T. and Simon, T.W., "Effectiveness of the Gas Turbine Endwall Fences in Secondary Flow Control at Elevated Freestream Turbulence Levels," 93-GT-51, International Gas Turbine and Aeroengine Congress and Exposition, Cincinnati, Ohio, 1993
15 Moon, Y. J., Koh, S. R., "Counter-rotating streamwise vortex formation in the turbine cascade with endwall fence," Computers & Fluids, Vol. 30, Issue 4, 2001, pp.473-490   DOI   ScienceOn
16 Camci, C., Rizzo, D. H., "Secondary flow and forced convection heat transfer near endwall boundary layer fences in a $90^{\circ}$ turning duct," International Journal of Heat and Mass Transfer, Vol. 45, 2002, pp.831-843   DOI   ScienceOn