Browse > Article

Numerical Study on Flow Characteristics at Blade Passage and Tip Clearance in a Linear Cascade of High Performance Turbine Blade  

Myong, Hyon-Kook (School of mechanical and Automotive Engineering, Kookmin University)
Yang, Seung-Yong (Department of Mechanical Engineering, Graduate School, Kookmin University)
Publication Information
Journal of Mechanical Science and Technology / v.17, no.4, 2003 , pp. 606-616 More about this Journal
Abstract
A numerical analysis has been conducted in order to simulate the characteristics of complex flow through linear cascades of high performance turbine blade with/without tip clearance by using a pressure-correction based, generalized 3D incompressible Wavier-Stokes CFD code. The development and generation of horseshoe vortex, passage vortex, leakage vortex, tip vortex within tip clearance, etc. are clearly identified through the present simulation which uses the RNG k-$\varepsilon$ turbulent model with wall function method and a second-order linear upwind scheme for convective terms. The present simulation results are consistent with the generally known tendency that occurs in the blade passage and tip clearance. A 3D model for secondary and leakage flows through turbine cascades with/without tip clearance is also suggested from the present simulation results, including the effects of tip clearance height.
Keywords
Turbine Cascades; Tip Clearance; Secondary Flow; Leakage Flow; Leakage Vortex; Tip Vortex; Simulation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Chernobrovkin, A., 1999, Numerical Simulation of Complex Turbomachinery Flows, PhD Thesis, The Pennsylvania State University
2 Chien, K. Y., 1982, 'Predictions of Channel and Boundary Layer Flows with a Low-Reynolds-Number Turbulence Model,' AIAA J., Vol. 20, No. 1, pp. 33-38   DOI   ScienceOn
3 Cho, H. H., Rhee, D. H. and Choi, J. H., 2001, 'Heat/Mass Transfer Characteristics on Turbine Shroud with Blade Tip Clearance,' Annals of the New York Academy of Sciences, Vol. 934, pp. 281-288   DOI   ScienceOn
4 Hah, C., 1984, 'A Navier-Stokes Analysis of Three-Dimensional Turbulent Flows inside Turbine Blade Rows at Design and Off-Design Conditions,' ASME J. Eng. Power, Vol. 106, pp. 421-429   DOI
5 Ho, Y. and Lakshminarayana, B., 1994, 'Computational Modeling of Three Dimensional Endwall Flow Through a Turbine Rotor Cascade with Strong Secondary Flows,' ASME paper 94 GT-136
6 Klein, A., 1966, 'Untersuchungen ber die Einfluss der Zustr mgrenzschicht auf die Sekund rstrmung in den Beschaufelunger von Axialturbinen,' Forsch. Ing., Bd 32, Nr 6
7 Lakshminarayana, B., 1996, Fluid Dynamics and Heat Transfer of Turbomachinery, John Wiley & Sons, Inc.
8 Langston, L. S., Nice, M. L. and Hooper, R. M., 1977, 'Three-Dimensional Flow within a Turbine Cascade Passage,' ASME J. Eng. Power, Vol. 99, pp. 21-28   DOI
9 Bindon, J. P. and Morphis, G., 1992, 'The Development of Axial Turbine Leakage Loss for Two Profield Tip Geometries Using Linear Cascade Data,' ASME J. Turbomachinery, Vol. 114, No. 1, pp. 198-203   DOI
10 Tallman, J. and Lakshminarayana, B., 2000, 'Numerical Simulation of Tip Leakage Flow in Axial Flow Turbines, with Emphasis on Flow Physics, Part I : Effect of Tip Clearance Height,' ASME Paper, No. 2000-GT-0514
11 Yamamoto, A., 1989, 'Endwall Flow/Loss Mechanisms in a Linear Turbine Cascades with Blade Tip Clearance,' ASME J. Turbomach., Vol. 111, pp. 264-275   DOI   ScienceOn
12 Gregory-Smith, D. G. and Cleak, J. G. E., 1992, 'Secondary Flow Measurements in a Turbine Cascade with High Inlet Turbulence,' ASME J. Turbomach., Vol. 114, pp. 173-180   DOI
13 Langston, L. S., 1980, 'Cross Flow in a Turbine Cascade Passage,' ASME J. Eng. Power, Vol. 102, pp. 866-874   DOI
14 Lee, H. G., 1995, Calculation of Turbulent Flows through Turbine Cascades with and without Tip clearance, PhD Thesis, Seoul National University
15 Myong, H. K., Park, H. K. and Jin, E., 1996, 'Simulation of Three-Dimensional Turbulent Flows around an Ahmed Body-Evaluation of Finite Differencing Schemes -,' Trans. KSME (B), Vol. 20, No. 11, pp. 2589-3597   과학기술학회마을
16 Yoo, J. Y. and Yun, J. W., 1994, 'Calculation of a 3D Turbine Cascade Flow,' Computational Mechanics, Vol. 14, pp. 101-115   DOI
17 Sjolander, S. A., 1997, 'Secondary and Tip-Clearance Flows in Axial Turbines : Physics of Tip-Clearance Flows-I,' von Karman Institute of Fluid Dynamics, Lecture Series 1997-01