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Hot-Wire Measurements in a High Speed Counter Rotating Turbo Fan Rig

[+] Author Affiliations
Robert Meyer, Karsten Knobloch, Johannes Linden

German Aerospace Center (DLR), Berlin, Germany

Paper No. GT2010-22569, pp. 247-254; 8 pages
doi:10.1115/GT2010-22569
From:
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 7: Turbomachinery, Parts A, B, and C
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4402-1 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME

abstract

The German Aerospace Center (DLR) has measured the unsteady flow field of a high speed Contra-Rotating Turbo Fan (CRTF). In order to perform the measurement, hot-wire probes were placed upstream of the first rotor, between both rotors and downstream of the second rotor. With the DLR hot-wire measuring technique, unsteady flow structures (e.g. the wake of each individual rotor blade) were measured and analyzed in detail. The averaged mean vectors as well as the fluctuation components of the velocity were determined. The calculated local turbulence distribution of the flow downstream of the rotating blades shows an increase of the turbulence intensity of 3% in the wake. With the phase-locked averaging and the spectral analysis an upstream effect of the rotor 2 was verified.

Copyright © 2010 by ASME
Topics: Measurement , Wire

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