Recent Applications of Three-Dimensional Doppler-Global Velocimetry in Turbo-Machinery
Roehle, I. and Willert, C. and Schodl, R. (1998) Recent Applications of Three-Dimensional Doppler-Global Velocimetry in Turbo-Machinery. 9th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 13-16 July, 1998.
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A Doppler global velocimetry (DGV) system optimised for time-averaged three component velocity measurements has been applied in two situations. The system uses a single viewing direction in conjunction with three different illumination directions. A frequency-stablised Ar+-laser (sn<1 MHz) and a pair of Peltier-cooled CCDs with 12-bit dynamic range allow a measurement resolution better than 1 m/s. A modified version of the hardware was used to map the cross-section of an engine inlet within a 1:10 scale aircraft model. In order to meet spatial constraints within the model, miniature light sheet devices and a flexible endoscope were necessary to obtain the data. In another application time-average volumetric, three-component velocity data was obtained in a double-staged, cold combustion chamber by translating the light sheet plane at 2 mm increments. More recent efforts directed toward obtaining phase-averaged DGV data are also presented.
|Document Type:||Conference or Workshop Item (Paper)|
|Title:||Recent Applications of Three-Dimensional Doppler-Global Velocimetry in Turbo-Machinery|
|Event Title:||9th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 13-16 July, 1998|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L - no assignement|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L TT - Triebwerkstechnologien|
|DLR - Research theme (Project):||UNSPECIFIED|
|Institutes and Institutions:||Institute of Propulsion Technology|
|Deposited By:||elib DLR-Beauftragter|
|Deposited On:||16 Sep 2005|
|Last Modified:||06 Jan 2010 13:03|
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