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Int. J. Turbomach. Propuls. Power 2018, 3(1), 8; https://doi.org/10.3390/ijtpp3010008

Active Boundary Layer Control on a Highly Loaded Turbine Exit Case Profile

1
Institute of Jet Propulsion, Bundeswehr University Munich, Werner-Heisenberg-Weg 39, 85577 Neubiberg, Germany
2
MTU Aero Engines AG, Dachauer Str. 665, 80995 München, Germany
This paper is an extended version of our paper published in Proceedings of the European Turbomachinery Conference ETC12 2017, Paper No. 191.
*
Author to whom correspondence should be addressed.
Received: 30 December 2017 / Revised: 18 February 2018 / Accepted: 26 February 2018 / Published: 6 March 2018
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Abstract

A highly loaded turbine exit guide vane with active boundary layer control was investigated experimentally in the High Speed Cascade Wind Tunnel at the University of the German Federal Armed Forces, Munich. The experiments include profile Mach number distributions, wake traverse measurements as well as boundary layer investigations with a flattened Pitot probe. Active boundary layer control by fluidic oscillators was applied to achieve improved performance in the low Reynolds number regime. Low solidity, which can be applied to reduce the number of blades, increases the risk of flow separation resulting in increased total pressure losses. Active boundary layer control is supposed to overcome these negative effects. The experiments show that active boundary layer control by fluidic oscillators is an appropriate way to suppress massive open separation bubbles in the low Reynolds number regime. View Full-Text
Keywords: turbine exit case; active flow control; low Reynolds numbers turbine exit case; active flow control; low Reynolds numbers
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Kurz, J.; Hoeger, M.; Niehuis, R. Active Boundary Layer Control on a Highly Loaded Turbine Exit Case Profile. Int. J. Turbomach. Propuls. Power 2018, 3, 8.

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