Particle image velocimetry of active flow control on a compressor cascade |
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Authors: | M Hecklau R van Rennings V Zander W Nitsche A Huppertz M Swoboda |
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Institution: | 1.Department of Aeronautics and Astronautics,Technische Universit?t Berlin,Berlin,Germany;2.Rolls-Royce Deutschland Ltd. & Co. KG,Dahlewitz,Germany |
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Abstract: | AFC (Active Flow Control) experiments have been performed by means of steady and pulsed blowing out of the sidewalls as well
as out of the blade’s suction surface in a highly loaded compressor cascade. PIV (Particle Image Velocimetry) was used to
evaluate the fully three-dimensional internal flow field and the impact of AFC methods. The aim was to observe the secondary
flow structures and flow instabilities by PIV, to tune the AFC device operation parameters. This paper summarizes the different
PIV measurements performed at the stator cascade to give an overview of the dominant flow features in the passage flow field
and to obtain a detailed view of control mechanisms. In addition, a new vortex detection method is presented, based on a 2D-wavelet
which is applicable in two-dimensional velocity data fields. |
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Keywords: | |
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