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Accelerating the Calibration of Multi-Hole Pressure Probes by Applying Advanced Computational Methods

[+] Author Affiliations
Arnoud R. C. Franken, Paul C. Ivey

Cranfield University, Cranfield, Bedfordshire, UK

Paper No. GT2004-53434, pp. 545-552; 8 pages
doi:10.1115/GT2004-53434
From:
  • ASME Turbo Expo 2004: Power for Land, Sea, and Air
  • Volume 2: Turbo Expo 2004
  • Vienna, Austria, June 14–17, 2004
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4167-7 | eISBN: 0-7918-3739-4
  • Copyright © 2004 by ASME

abstract

The miniature multi-hole pneumatic pressure probe is widely regarded as a cost-effective, easy-to-use and accurate method for performing two- or three-dimensional flow field measurements in turbomachinery. The major downside to the use of these probes is that the influence of fabrication imperfections on probe characteristics necessitates an extensive and highly time-intensive and, therefore, costly calibration of each individual probe. Unless these probes can be fabricated to such standards that make individual probe calibrations superfluous, the only way to significantly reduce the time and costs associated with probe calibration is to shorten the calibration process. The latter is only possible if all essential information can be obtained from less calibration data. This paper describes a novel approach to the calibration of a series of multi-hole pressure probes in which advanced computational methods are used to make this possible. By exploiting the key features of a probe’s characteristic this approach requires only a fraction of the size of a conventional calibration database for the accurate modeling of the relationships between port pressures and flow conditions. As a result, calibration time and costs can be reduced without the sacrifice of quality.

Copyright © 2004 by ASME

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