Abstract
We investigated a non-steady compressor stator flow of the type that would be expected in a pulsed detonation engine. The effects on the stator vane of the last stator stage were discussed and results from the two-dimensional compressor stator cascade in Berlin are presented. Static pressure measurements showed periodic flow separation phenomena on the measurement blade with respect to the working-phase of a choking-device mounted in the wake of the cascade imposing the non-steady outflow condition. By means of active flow control (AFC) it was possible to avoid flow separation on the measurement blade. Furthermore a figure of merit was defined in order to rate the increase of static pressure recovery with respect to the AFC input. Using an optimized AFC setup the flow-field could be stabilized.
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Acknowledgements
The authors gratefully acknowledge support by the Deutsche Forschungsgemeinschaft (DFG) as part of collaborative research centre SFB 1029 “Substantial efficiency increase in gas turbines through direct use of coupled unsteady combustion and flow dynamics.”
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Staats, M., Nitsche, W. (2018). Active Flow Control on a Non-steady Operated Compressor Stator Cascade by Means of Fluidic Devices. In: Dillmann, A., et al. New Results in Numerical and Experimental Fluid Mechanics XI. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 136. Springer, Cham. https://doi.org/10.1007/978-3-319-64519-3_31
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DOI: https://doi.org/10.1007/978-3-319-64519-3_31
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