Acquisition of Unsteady Pressure Measurements From a High Speed Multi-Stage Compressor PUBLIC ACCESS

[+] Author Affiliations
William W. Copenhaver, Christopher J. Worland

Air Force Wright Aeronautical Laboratories, Wright-Patterson Air Force Base, OH

Paper No. 88-GT-189, pp. V001T01A065; 8 pages
  • ASME 1988 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Amsterdam, The Netherlands, June 6–9, 1988
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7918-4
  • Copyright © 1988 by ASME


Two methods for acquiring transient pressure measurements from a high speed multi-stage compressor are presented. Data were obtained from upstream, inter-stage and downstream measurement locations on the compressor during unsteady operation. The two methods of data acquisition were real time digital conversion of close coupled pressures and frequency modulated (FM) analog recording of high response measurements. The close coupled measurements provide for a nominal frequency response of 70 Hz while the high response measurements provided 200 Hz nominal response. A description of both acquisition systems is provided with discussion of the limitations involved in both methods. Examples and comparisons of data obtained by both methods are presented.

Copyright © 1988 by ASME
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