The Effect of a Downstream Rotor on the Measured Performance of a Transonic Turbine Nozzle

[+] Author and Article Information
R. G. Williamson

Gas Dynamics Laboratory, National Research Council of Canada, Ottawa, Ontario, Canada K1A 0R6

S. H. Moustapha, J. P. Huot

Pratt & Whitney Canada Inc., Longueuil, Quebec, Canada J4K 4X9

J. Turbomach 108(2), 269-274 (Oct 01, 1986) (6 pages) doi:10.1115/1.3262047 History: Received January 20, 1986; Online November 09, 2009


Two nozzle designs, involving the same low aspect ratio, high turning angle vanes, and differing in outer wall contour, were tested over a range of exit Mach numbers up to supersonic values. The experiments were conducted on a large-scale, full annular configuration with and without a representative rotor downstream. Nozzle performance was found to be significantly affected by rotor operation, the influence depending on the detailed characteristics of the nozzle flow field, as well as on the design and operation of the rotor itself. It is suggested that performance evaluation of low aspect ratio nozzles of high turning angle may require appropriate testing with a rotor.

Copyright © 1986 by ASME
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