The Transition Mechanism of Highly Loaded Low-Pressure Turbine Blades-Reference-Cited by-同舟云学术

The Transition Mechanism of Highly Loaded Low-Pressure Turbine Blades

Published:2004-10-01 Issue:4 Volume:126 Page:536-543
ISSN:0889-504X
Container-title:Journal of Turbomachinery
language:en
Short-container-title:

Author:

Stieger R. D.¹,Hodson H. P.¹

Affiliation:

1. Whittle Laboratory, Cambridge University, Engineering Department, Madingley Road, Cambridge CB3 0DY, UK

Abstract

A detailed experimental investigation was conducted into the interaction of a convected wake and a separation bubble on the rear suction surface of a highly loaded low-pressure (LP) turbine blade. Boundary layer measurements, made with 2D LDA, revealed a new transition mechanism resulting from this interaction. Prior to the arrival of the wake, the boundary layer profiles in the separation region are inflexional. The perturbation of the separated shear layer caused by the convecting wake causes an inviscid Kelvin-Helmholtz rollup of the shear layer. This results in the breakdown of the laminar shear layer and a rapid wake-induced transition in the separated shear layer.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/turbomachinery/article-pdf/126/4/536/5694812/536_1.pdf

Reference19 articles.

1. Schulte, V., and Hodson, H. P., 1994, “Wake-Separation Bubble Interaction in Low Pressure Turbines,” AIAA/SAE/ASME/ASEE 30th Joint Propulsion Conference and Exhibit, Indianapolis, IN.

2. Schulte, V., and Hodson, H. P., 1998, “Unsteady Wake-Induced Boundary Layer Transition in High Lift LP Turbines,” ASME J. Turbomach., 120, pp. 28–35.

3. Curtis, E. M., Hodson, H. P., Banieghbal, M. R., Denton, J. D., and Howell, R. J., 1996, “Development of Blade Profiles for Low Pressure Turbine Applications,” ASME Paper 96-GT-358.

4. Howell, R. J., Ramesh, O. N., Hodson, H. P., Harvey, N. W., and Schulte, V., 2000, “High Lift and Aft Loaded Profiles for Low Pressure Turbines,” ASME Paper 2000-GT-261.

5. Cobley, K., Coleman, N., Siden, G., and Arndt, N., 1997, “Design of New Three Stage Low Pressure Turbine for BMW Rolls-Royce BR715 Engine,” ASME Paper 97-GT-419.

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