Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/80338
Title: Effects of leading-edge tubercles on wing flutter speeds
Authors: New, Tze How
Palacios, R.
Ng, Bing Feng
Keywords: Mechanical and Aerospace Engineering
Issue Date: 2016
Source: Ng, B. F., New, T. H., & Palacios R. (2016). Effects of leading-edge tubercles on wing flutter speeds. Bioinspiration and Biomimetics, 11(3), 036003.
Series/Report no.: Bioinspiration and Biomimetics
Abstract: The dynamic aeroelastic effects on wings modified with bio-inspired leading-edge (LE) tubercles are examined in this study. We adopt a state-space aeroelastic model via the coupling of unsteady vortex-lattice method and a composite beam to evaluate stability margins as a result of LE tubercles on a generic wing. The unsteady aerodynamics and spanwise mass variations due to LE tubercles have counteracting effects on stability margins with the former having dominant influence. When coupled, flutter speed is observed to be 5% higher, and this is accompanied by close to 6% decrease in reduced frequencies as an indication of lower structural stiffness requirements for wings with LE tubercles. Both tubercle amplitude and wavelength have similar influences over the change in flutter speeds, and such modifications to the LE would have minimal effect on stability margins when concentrated inboard of the wing. Lastly, when used in sweptback wings, LE tubercles are observed to have smaller impacts on stability margins as the sweep angle is increased.
URI: https://hdl.handle.net/10356/80338
http://hdl.handle.net/10220/40684
ISSN: 1748-3182
DOI: 10.1088/1748-3190/11/3/036003
Rights: © 2016 IOP Publishing Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Bioinspiration and Biomimetics, IOP Publishing Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org.ezlibproxy1.ntu.edu.sg/10.1088/1748-3190/11/3/036003].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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