Tip Leakage Losses in a Linear Turbine Cascade PUBLIC ACCESS

[+] Author Affiliations
Peter T. Dishart, John Mdore

Virginia Polytechnic Institute and State University, Blacksburg, VA

Paper No. 89-GT-56, pp. V001T01A029; 12 pages
  • ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Toronto, Ontario, Canada, June 4–8, 1989
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7913-9
  • Copyright © 1989 by ASME


An investigation of lip leakage flow and its effects on loss production was performed on a large scale linear turbine cascade having a tip gap measuring 2.1% of the blade height. The flow exiting the tip gap was measured to determine the tosses incurred within the tip gap and the secondary kinetic energy due to tip leakage. Additional measurements, 40% of an axial chord downstream of the blade trailing edges, showed the development of the leakage flow and the overall cascade losses. At the downstream location, the additional loss due to lip leakage was found to be the sum of the measured loss at the tip gap exit plane and the amount of tip gap secondary kinetic energy which had been dissipated by that downstream location.

Copyright © 1989 by ASME
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