The paper presents detailed experimental results of the secondary flows from two large-scale, low-speed linear turbine cascades. The aerofoils for the two cascades were designed for the same inlet and outlet conditions and differ mainly in their leading-edge geometries. Detailed flow field measurements were made upstream and downstream of the cascades using three and seven-hole pressure probes and static pressure distributions were measured on the aerofoil surfaces. All measurements were made exclusively at the design incidence. The results from this experiment suggest that the strength of the passage vortex plays an important role in the downstream flow field and loss behavior. It was concluded that the aerofoil loading distribution has a significant influence on the strength of this vortex. In contrast, the leading-edge geometry appears to have only a minor influence on the secondary flow field, at least for the design incidence.
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e-mail: michael.benner@nrc-cnrc.gc.ca
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April 2004
Technical Papers
The Influence of Leading-Edge Geometry on Secondary Losses in a Turbine Cascade at the Design Incidence
M. W. Benner,
e-mail: michael.benner@nrc-cnrc.gc.ca
M. W. Benner
Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, ON, Canada
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S. A. Sjolander,
S. A. Sjolander
Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, ON, Canada
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S. H. Moustapha
S. H. Moustapha
Pratt and Whitney Canada, Inc., Longueuil, PQ, Canada
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M. W. Benner
Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, ON, Canada
e-mail: michael.benner@nrc-cnrc.gc.ca
S. A. Sjolander
Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, ON, Canada
S. H. Moustapha
Pratt and Whitney Canada, Inc., Longueuil, PQ, Canada
Contributed by the International Gas Turbine Institute and presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Atlanta, GA, June 16–19, 2003. Manuscript received by the IGTI December 2002; final revision March 2003. Paper No. 2003-GT-38107. Review Chair: H. R. Simmons.
J. Turbomach. Apr 2004, 126(2): 277-287 (11 pages)
Published Online: June 15, 2004
Article history
Received:
December 1, 2002
Revised:
March 1, 2003
Online:
June 15, 2004
Citation
Benner, M. W., Sjolander , S. A., and Moustapha, S. H. (June 15, 2004). "The Influence of Leading-Edge Geometry on Secondary Losses in a Turbine Cascade at the Design Incidence ." ASME. J. Turbomach. April 2004; 126(2): 277–287. https://doi.org/10.1115/1.1645533
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