Performance and Flow Regime of Annular Diffusers With Axial Turbomachine Discharge Inlet Conditions

[+] Author and Article Information
S. O. Adenubi

Mechanical Engineering Department, University of Lagos, Lagos, Nigeria

J. Fluids Eng 98(2), 236-242 (Jun 01, 1976) (7 pages) doi:10.1115/1.3448272 History: Received August 15, 1975; Online October 12, 2010


An experimental investigation of the flow regime and the performance of straight-core annular diffusers operating immediately downstream of an axial compressor was carried out. Features of the compressor’s discharge including the size of the blade wakes, the streamwise relative turbulence intensity and the periodic streamwise component of velocity induced by the rotor blades were studied. The periodic streamwise velocity component was found to be quite small and it decayed as the flow proceeded through the diffusers. The relative turbulence intensities were comparatively large and increased along the diffusers. The statistical distribution of the stall periods for the diffuser with transitory stall had characteristics similar to those found for two-dimensional diffusers.

Copyright © 1976 by ASME
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