Turbine Testing With High-Line, Low Differential Pressure Measurement PUBLIC ACCESS

[+] Author Affiliations
Blair R. Chalpin

Scanivalve Corporation

Paper No. 97-GT-527, pp. V004T15A039; 5 pages
  • ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award
  • Orlando, Florida, USA, June 2–5, 1997
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7871-2
  • Copyright © 1997 by ASME


The precise measurement of small pressure variations along and around the aerofoil stages of multi-stage machinery is error prone. This is attributable to high absolute pressures and low differential pressures. Using two high range transducers to measure pressure up and down stream of a stage, and calculating the differential by subtracting one from another introduces the error. This paper describes a method adapting low cost, low range differential pressure transducers to operate at line pressures above their burst pressure with improved accuracies. Multipoint and high-line zero calibrations, leak-checks and other troubleshooting configurations as well as a safe mode are possible.

Copyright © 1997 by ASME
This article is only available in the PDF format.



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