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Aeroelastic stability analysis of aircraft wings with initial curvature

M.R. Amoozgar, S.A. Fazelzadeh, Hamed Haddad Khodaparast Orcid Logo, Michael Friswell, J.E. Cooper

Aerospace Science and Technology, Volume: 107, Start page: 106241

Swansea University Authors: Hamed Haddad Khodaparast Orcid Logo, Michael Friswell

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DOI (Published version): 10.1016/j.ast.2020.106241

Abstract

In this study, the aeroelastic instability of a wing with an initial out-of-plane curvature is determined. The structural dynamics of the wing is modelled by using the geometrically exact beam equations, and the aerodynamic loads are determined using an incompressible unsteady aerodynamic model. The...

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Published in: Aerospace Science and Technology
ISSN: 1270-9638
Published: Elsevier BV 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa55325
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spelling 2020-11-30T12:47:50.9585490 v2 55325 2020-10-05 Aeroelastic stability analysis of aircraft wings with initial curvature f207b17edda9c4c3ea074cbb7555efc1 0000-0002-3721-4980 Hamed Haddad Khodaparast Hamed Haddad Khodaparast true false 5894777b8f9c6e64bde3568d68078d40 Michael Friswell Michael Friswell true false 2020-10-05 AERO In this study, the aeroelastic instability of a wing with an initial out-of-plane curvature is determined. The structural dynamics of the wing is modelled by using the geometrically exact beam equations, and the aerodynamic loads are determined using an incompressible unsteady aerodynamic model. The wing is considered to have initial out-of-plane curvature, and the effect of the curvature on the flutter velocity and flutter frequency of the wing is determined. Two curved wing cases are considered here. In the first case, the length of the wing is assumed to be constant and therefore, as the wing is curved, the projected area of the wing decreases. In the second case, the wing is assumed to have a constant projected area and therefore different curvature angles result from different wing lengths. When the wing is designed to have an initial out-of-plane curvature, the wing dynamics change, and therefore the aeroelastic stability of the curved wing is also affected. It is shown that as the initial curvature of the wing increases, initially the flutter velocity decreases but then increases, and finally a sudden jump occurs in the flutter velocity due to the change of the coupled modes contributing to flutter. Moreover, the flutter frequency also first decreases as the curvature of the wing increases, and then there is a sudden jump in the frequency, and from this point again the frequency decreases. Finally, results highlighting the importance of the initial curvature and the length of the curved segment on the stability velocity and frequency of the curved wing are presented. Journal Article Aerospace Science and Technology 107 106241 Elsevier BV 1270-9638 Curved wings, Aeroelastic instability, Initial curvature, Fully intrinsic equations, Unsteady aerodynamics 1 12 2020 2020-12-01 10.1016/j.ast.2020.106241 COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University 2020-11-30T12:47:50.9585490 2020-10-05T12:50:41.9693851 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised M.R. Amoozgar 1 S.A. Fazelzadeh 2 Hamed Haddad Khodaparast 0000-0002-3721-4980 3 Michael Friswell 4 J.E. Cooper 5 55325__18327__bd786d2088a447bea28823f6806df294.pdf 55325.pdf 2020-10-06T11:00:47.0446204 Output 1233950 application/pdf Accepted Manuscript true 2021-09-29T00:00:00.0000000 © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title Aeroelastic stability analysis of aircraft wings with initial curvature
spellingShingle Aeroelastic stability analysis of aircraft wings with initial curvature
Hamed Haddad Khodaparast
Michael Friswell
title_short Aeroelastic stability analysis of aircraft wings with initial curvature
title_full Aeroelastic stability analysis of aircraft wings with initial curvature
title_fullStr Aeroelastic stability analysis of aircraft wings with initial curvature
title_full_unstemmed Aeroelastic stability analysis of aircraft wings with initial curvature
title_sort Aeroelastic stability analysis of aircraft wings with initial curvature
author_id_str_mv f207b17edda9c4c3ea074cbb7555efc1
5894777b8f9c6e64bde3568d68078d40
author_id_fullname_str_mv f207b17edda9c4c3ea074cbb7555efc1_***_Hamed Haddad Khodaparast
5894777b8f9c6e64bde3568d68078d40_***_Michael Friswell
author Hamed Haddad Khodaparast
Michael Friswell
author2 M.R. Amoozgar
S.A. Fazelzadeh
Hamed Haddad Khodaparast
Michael Friswell
J.E. Cooper
format Journal article
container_title Aerospace Science and Technology
container_volume 107
container_start_page 106241
publishDate 2020
institution Swansea University
issn 1270-9638
doi_str_mv 10.1016/j.ast.2020.106241
publisher Elsevier BV
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
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description In this study, the aeroelastic instability of a wing with an initial out-of-plane curvature is determined. The structural dynamics of the wing is modelled by using the geometrically exact beam equations, and the aerodynamic loads are determined using an incompressible unsteady aerodynamic model. The wing is considered to have initial out-of-plane curvature, and the effect of the curvature on the flutter velocity and flutter frequency of the wing is determined. Two curved wing cases are considered here. In the first case, the length of the wing is assumed to be constant and therefore, as the wing is curved, the projected area of the wing decreases. In the second case, the wing is assumed to have a constant projected area and therefore different curvature angles result from different wing lengths. When the wing is designed to have an initial out-of-plane curvature, the wing dynamics change, and therefore the aeroelastic stability of the curved wing is also affected. It is shown that as the initial curvature of the wing increases, initially the flutter velocity decreases but then increases, and finally a sudden jump occurs in the flutter velocity due to the change of the coupled modes contributing to flutter. Moreover, the flutter frequency also first decreases as the curvature of the wing increases, and then there is a sudden jump in the frequency, and from this point again the frequency decreases. Finally, results highlighting the importance of the initial curvature and the length of the curved segment on the stability velocity and frequency of the curved wing are presented.
published_date 2020-12-01T04:09:27Z
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