Summary
This paper describes experimental investigations on active control of a separated shear layer in a turbulent axisymmetric diffuser flow. The research was aimed at influencing the separated flow in the diffuser in order to reduce the separation length by means of periodic pressure perturbations at the diffuser entrance edge. The measurements were conducted in a closed pipe flow channel with an optically fully accessible test section to use laser optical velocity measurement methods. The overall separation length could be significantly reduced to about 40% of the unforced base flow, while an enlarged intensity of the turbulent impulse transport inside the shear layer could be observed.
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Brunn, A., Nitsche, W. (2004). Active Control of the Separated Shear Layer in an Axisymmetric Diffuser Flow by Means of Periodic Forcing. In: Breitsamter, C., Laschka, B., Heinemann, HJ., Hilbig, R. (eds) New Results in Numerical and Experimental Fluid Mechanics IV. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 87. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-39604-8_42
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DOI: https://doi.org/10.1007/978-3-540-39604-8_42
Publisher Name: Springer, Berlin, Heidelberg
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