Method for calculating rotors with active gurney flaps

Woodgate, M. A., Pastrikakis, V. A. and Barakos, G. N. (2016) Method for calculating rotors with active gurney flaps. Journal of Aircraft, 53(3), pp. 605-626. (doi:10.2514/1.C032773)

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Abstract

This paper builds on the Helicopter Multi-Block version 2 computational-fluid-dynamics solver of the University of Liverpool and demonstrates the implementation and use of Gurney flaps on wings and rotors. The idea is to flag any cell face within the computational mesh with a solid, no-slip boundary condition. Hence, the infinitely thin Gurney can be approximated by “blocking cells” in the mesh. Comparison between thick Gurney flaps and infinitely thin Gurneys showed no difference on the integrated loads; the same flow structure was captured and the same vortices were identified ahead and behind the Gurney. The results presented for various test cases suggest that the method is simple and efficient, and it can therefore be used for routine analysis of rotors with Gurney flaps. Moreover, the current method adds to the flexibility of the solver because no special grids are required, and Gurney flaps can be easily implemented. Simple two-dimensional aerofoil, three-dimensional wing, and rotors in hover and forward flight were tested with fixed, linearly actuated, and swinging Gurneys, and the ability of the code to deploy a Gurney flap within the multiblock mesh is highlighted. The need for experimental data suitable for validation of computational-fluid-dynamics methods for cases of rotors with Gurney flaps is also highlighted.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Barakos, Professor George and Woodgate, Dr Mark
Authors: Woodgate, M. A., Pastrikakis, V. A., and Barakos, G. N.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Journal of Aircraft
Publisher:American Institute of Aeronautics and Astronautics
ISSN:0021-8669
ISSN (Online):1533-3868
Published Online:24 February 2016
Copyright Holders:Copyright © 2016 American Institute of Aeronautics and Astronautics
First Published:First published in Journal of Aircraft 53(3):605-626
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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