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Highly Loaded Low-Pressure Turbine: Design, Numerical, and Experimental Analysis

[+] Author Affiliations
J. T. Schmitz, S. C. Morris, R. Ma, T. C. Corke

University of Notre Dame, Notre Dame, IN

J. P. Clark, P. J. Koch, S. L. Puterbaugh

Propulsion Directorate - Air Force Research Laboratory, WPAFB, OH

Paper No. GT2010-23591, pp. 1633-1646; 14 pages
doi:10.1115/GT2010-23591
From:
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 7: Turbomachinery, Parts A, B, and C
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4402-1 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME

abstract

The performance and detailed flow physics of a highly loaded, transonic, low-pressure turbine stage has been investigated numerically and experimentally. The mean rotor Zweifel coefficient was 1.35, with dh/U2 = 2.8, and a total pressure ratio of 1.75. The aerodynamic design was based on recent developments in boundary layer transition modeling. Steady and unsteady numerical solutions were used to design the blade geometry as well as to predict the design and off-design performance. Measurements were acquired in a recently developed, high-speed, rotating turbine facility. The nozzle-vane only and full stage characteristics were measured with varied mass flow, Reynolds number, and free-stream turbulence. The efficiency calculated from torque at the design speed and pressure ratio of the turbine was found to be 90.6%. This compared favorably to the mean line target value of 90.5%. This paper will describe the measurements and numerical solutions in detail for both design and off-design conditions.

Copyright © 2010 by ASME

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