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Laminar Separation Bubble Manipulation with Dynamic Roughness

Wallace, R. D. and McKeon, B. J. (2012) Laminar Separation Bubble Manipulation with Dynamic Roughness. In: 6th AIAA Flow Control Conference. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2012-2680. ISBN 9781624101885. https://resolver.caltech.edu/CaltechAUTHORS:20190826-092412147

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Abstract

The laminar separation over a symmetric, idealized airfoil was altered by employing a leading edge roughness element ahead of the separation point. Experimental tests were performed with a dynamic roughness, with a time-dependent amplitude, in order to determine the range of control authority associated with this type of leading edge manipulation. The dynamic roughness tests demonstrated the sensitivity of the separation to frequency perturbations at the leading edge induced by the roughness element. Two low dimensional analysis techniques, Proper Orthogonal Decomposition and Dynamic Mode Decomposition, were employed to examine the coupling between the wall motion and the flow, with a view to investigating the practicality of using leading edge roughness perturbations to in future closed loop control configurations.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2012-2680DOIArticle
ORCID:
AuthorORCID
McKeon, B. J.0000-0003-4220-1583
Additional Information:© 2012 American Institute of Aeronautics and Astronautics.
Group:GALCIT
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2012-2680
Record Number:CaltechAUTHORS:20190826-092412147
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190826-092412147
Official Citation:Laminar Separation Bubble Manipulation with Dynamic Roughness Ryan Wallace and Beverley McKeon 6th AIAA Flow Control Conference. https://doi.org/10.2514/6.2012-2680
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98214
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:26 Aug 2019 17:04
Last Modified:03 Oct 2019 21:39

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