Unsteady Transition in an Axial-Flow Turbine: Part 1—Measurements on the Turbine Rotor

[+] Author and Article Information
J. S. Addison, H. P. Hodson

Whittle Laboratory, Cambridge University, Cambridge CB3 ODY, United Kingdom

J. Turbomach 112(2), 206-214 (Apr 01, 1990) (9 pages) doi:10.1115/1.2927634 History: Received February 14, 1989; Online June 09, 2008


Previously published measurements in a low-speed, single-stage, axial-flow turbine have been reanalyzed in the light of more recent understanding. The measurements include time-resolved hot-wire traverses and surface hot film gage measurements at the midspan of the rotor suction surface with three different rotor-stator spacings. Part 1 investigates the suction surface boundary layer transition process, using surface-distance time plots and boundary layer cross sections to demonstrate the unsteady and two-dimensional nature of the process. Part 2 of the paper will describe the results of supporting experiments carried out in a linear cascade together with a simple transition model, which explains the features seen in the turbine.

Copyright © 1990 by The American Society of Mechanical Engineers
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