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RESEARCH PAPERS

Detailed Flow Measurements in a Centrifugal Compressor Vaneless Diffuser

[+] Author and Article Information
A. Pinarbasi

Department of Mechanical Engineering, University of Cumhuriyet, Sivas, Turkey

M. W. Johnson

Department of Mechanical Engineering, University of Liverpool, Liverpool, United Kingdom

J. Turbomach 116(3), 453-460 (Jul 01, 1994) (8 pages) doi:10.1115/1.2929432 History: Received February 19, 1993; Online June 09, 2008

Abstract

Hot-wire anemometer measurements have been made in the vaneless diffuser of a 1-m-dia low-speed backswept centrifugal compressor using a phase lock loop technique. Radial, tangential, and axial velocity measurements have been made on eight measurement planes through the diffuser. The flow field at the diffuser entry clearly shows the impeller jet-wake flow pattern and the blade wakes. The passage wake is located on the shroud side of the diffuser and mixes out slowly as the flow moves through the diffuser. The blade wakes, on the other hand, distort and mix out rapidly in the diffuser. Contours of turbulent kinetic energy are also presented on each of the measurement stations, from which the regions of turbulent mixing can be deduced.

Copyright © 1994 by The American Society of Mechanical Engineers
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