Interturbine diffusers provide continuity between HP and LP turbines while diffusing the flow upstream of the LP turbine. Increasing the mean turbine diameter offers the potential advantage of reducing the flow factor in the following stages, leading to increased efficiency. The flows associated with these interturbine diffusers differ from those in simple annular diffusers both as a consequence of their high-curvature S-shaped geometry and of the presence of wakes created by the upstream turbine. It is shown that even the simplest two-dimensional wakes result in significantly modified flows through such ducts. These introduce strong secondary flows demonstrating that fully three-dimensional, viscous analysis methods are essential for correct performance modeling.
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April 1996
Research Papers
The Influence of Blade Wakes on the Performance of Interturbine Diffusers
R. G. Dominy,
R. G. Dominy
School of Engineering, University of Durham, Durham, United Kingdom
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D. A. Kirkham
D. A. Kirkham
School of Engineering, University of Durham, Durham, United Kingdom
Search for other works by this author on:
R. G. Dominy
School of Engineering, University of Durham, Durham, United Kingdom
D. A. Kirkham
School of Engineering, University of Durham, Durham, United Kingdom
J. Turbomach. Apr 1996, 118(2): 347-352 (6 pages)
Published Online: April 1, 1996
Article history
Received:
February 18, 1994
Online:
January 29, 2008
Citation
Dominy, R. G., and Kirkham, D. A. (April 1, 1996). "The Influence of Blade Wakes on the Performance of Interturbine Diffusers." ASME. J. Turbomach. April 1996; 118(2): 347–352. https://doi.org/10.1115/1.2836649
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