Schlieren Systems for Flow Visualization in Axial and Radial Flow Compressors

[+] Author and Article Information
M. Philbert, G. Fertin

Office National d’Etudes et de Recherches Aerospatiales (ONERA), Chatillon, France

J. Eng. Power 97(2), 254-260 (Apr 01, 1975) (7 pages) doi:10.1115/1.3445976 History: Received November 27, 1973; Online July 14, 2010


Optical setups have been designed and built at ONERA to visualize aerodynamic flows within a fixed annular cascade, a supersonic axial compressor, and a supersonic centrifugal compressor. As these setups work by reflection on the metallic surfaces carrying the blades, special devices had to be devised for each installation. In rotating machines, the rapid evolution of the phenomena necessitates, for image recording, the use of strotoscopic synchronization devices, of fast, flash-synchronized cameras, of electronic shutters and of flash lamps. The schlieren visualization of the flow, made possible by these devices, is a precious tool to define more compact machines with high compression rates and minimum losses.

Copyright © 1975 by ASME
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