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RESEARCH PAPERS

Three-Dimensional Flow Within a Turbine Cascade Passage

[+] Author and Article Information
L. S. Langston, M. L. Nice

Engineering 2G4, Pratt & Whitney Aircraft, East Hartford, Conn.

R. M. Hooper

United Technologies Research Center, East Hartford, Conn.

J. Eng. Power 99(1), 21-28 (Jan 01, 1977) (8 pages) doi:10.1115/1.3446247 History: Received December 11, 1975; Online July 14, 2010

Abstract

Detailed measurements of the subsonic flow in a large-scale, plane turbine cascade were made to evaluate the three-dimensional nature of the flow field. Tests were conducted at a passage aspect ratio of 1.0 with a collateral inlet boundary layer. Flow visualization was done on airfoil and endwall surfaces. Velocity and pressure measurements were taken before and behind the cascade and in six axial planes within a cascade passage, using a five-hole probe. Hot wire measurements were taken in the endwall boundary layer within the cascade passage. The characteristics of the endwall boundary layer are presented, showing that three-dimensional separation is an important feature of end-wall flow. A large part of the endwall boundary layer was found to be very thin when compared to the cascade inlet boundary layer. Data showing the growth of aerodynamic loss through the passage are discussed.

Copyright © 1977 by ASME
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