Rehder, H.-J. and Kost, F. and Kessar, A. (2005) Low Engine Order Stage Tests at DLR (Time-Averaged Results). DLR-Interner Bericht, Project Report. 225-2005 A 02, 100 S.
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As part of the Brite/EuRam project "Aeroelastic Design of Turbine Blades II" (ADTurBII) Low Engine Order (LEO) experiments in a high pressure turbine stage with stator coolant flow and throat area ariation have been carried out in the windtunnel for rotating cascades (RGG) at DLR in Göttingen. Total pressures in the rotor exit flow field were measured by pitot probe at up to 8 radial locations between 10% and 90% channel height. 2D-velocity vectors and turbulence intensities in the tator-rotor gap and in the rotor exit field were measured by a Laser-2-Focus (L2F) anemometer at 20%, 50% and 90% height. Investigations were performed for a low and high pressure ratio, covering at least one period of low engine order (up to 9 stator passages). Only time averaged results are presented and evaluated. A Fourier analysis reveals the harmonic contents of the low engine order flow field. Local homogeneous (mixed out) flow field quantities were calculated for every low engine order stator pitch.
|Document Type:||Monograph (DLR-Interner Bericht, Project Report)|
|Title:||Low Engine Order Stage Tests at DLR (Time-Averaged Results)|
|Number of Pages:||100|
|Keywords:||high pressure turbine stage, Low Engine Order (LEO) excitation, stator throat area variation, stator coolant flow variation, Laser-Two-Focus (L2F) measurements, probe traverse measurements|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||Propulsion Systems|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L ER - Engine Research|
|DLR - Research theme (Project):||L - Turbine Technologies|
|Institutes and Institutions:||Institute of Propulsion Technology|
|Deposited By:||elib DLR-Beauftragter|
|Deposited On:||16 Sep 2005|
|Last Modified:||06 Jan 2010 13:37|
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