This study was conducted for the purpose of providing a more fundamental understanding of separated flow in cascades and to provide performance data for fully-stalled blade rows. Cascades of a single blade geometry and a solidity of unity were studied for three stagger angles and the full range of angle of attack extending well into the stalled flow regime. The Reynolds number was also varied for a limited number of cases. Results from velocity and pressure measurements made in the cascade and the overall cascade performance evaluated from these measurements are presented. In addition, results from a numerical simulation of the flow through a cascade of flat plate airfoils are used to further illustrate the effects of blade stagger and to define the correct limits for the cascade performance. The results indicate that the slope of the total pressure loss versus angle of attack curve for the flow immediately downstream of the cascade is steeper for cascades with greater stagger. The normal force coefficient was found to increase to a peak value near the angle of attack where full leading edge stall first occurs. A further increase in angle of attack results in a decline in the normal force coefficient. The peak value of the normal force coefficient is greater and occurs at a higher angle of attack for the cascades with smaller stagger.
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ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition
June 1–4, 1992
Cologne, Germany
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-7893-4
PROCEEDINGS PAPER
Separated Flow in a Low Speed Two-Dimensional Cascade: Part II — Cascade Performance
Adam M. Yocum,
Adam M. Yocum
Pennsylvania State University, State College, PA
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Walter F. O’Brien
Walter F. O’Brien
Virginia Polytechnic Institute and State University, Blacksburg, VA
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Adam M. Yocum
Pennsylvania State University, State College, PA
Walter F. O’Brien
Virginia Polytechnic Institute and State University, Blacksburg, VA
Paper No:
92-GT-357, V001T01A122; 15 pages
Published Online:
March 3, 2015
Citation
Yocum, AM, & O’Brien, WF. "Separated Flow in a Low Speed Two-Dimensional Cascade: Part II — Cascade Performance." Proceedings of the ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. Volume 1: Turbomachinery. Cologne, Germany. June 1–4, 1992. V001T01A122. ASME. https://doi.org/10.1115/92-GT-357
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