Time-Variant Aerodynamics of High-Turning Blade Elements

[+] Author and Article Information
M. D. Rothrock, R. L. Jay, R. E. Riffel

Cascades and Flow Systems Research, Detroit Diesel Allison Division, General Motors Corporation, Indianapolis, Ind. 46206

J. Eng. Power 104(2), 412-419 (Apr 01, 1982) (8 pages) doi:10.1115/1.3227296 History: Received December 11, 1980; Online September 28, 2009


Basic experimental data has been obtained from a linear cascade of five turbine airfoil sections undergoing torsional oscillation. A high-turning subsonic/transonic cascade was tested and both steady-state and time-variant data were obtained. A quasi-static investigation was conducted to compare static pressure distributions with the pressure distributions from the time-variant investigation. During the time-variant data acquisition, six values of interblade phase angle were investigated at each of four expansion ratios. Unsteady pressures were measured by flush-mounted Kulite pressure transducers on the center airfoil and compared with an oscillating flat-plate cascade analysis.

Copyright © 1982 by ASME
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