Development of unsteady three-dimensional lifting line model and its application in aeroelasticity

Most fixed wing aircraft face a dangerous consequence of speed: aeroelasticity. Aeroelastic vibration can lead to a loss in lift, an increase in drag and very rarely, catastrophic failure. As such, determining the aeroelastic characteristics of a wing is key to reduce the risk of structural failure....

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Main Author: Chow, Earl Jun Zhong
Other Authors: Basman Elhadidi
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2020
Subjects:
Online Access:https://hdl.handle.net/10356/141883
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1418832023-03-04T19:41:32Z Development of unsteady three-dimensional lifting line model and its application in aeroelasticity Chow, Earl Jun Zhong Basman Elhadidi School of Mechanical and Aerospace Engineering mbasman@ntu.edu.sg Engineering::Aeronautical engineering::Aerodynamics Most fixed wing aircraft face a dangerous consequence of speed: aeroelasticity. Aeroelastic vibration can lead to a loss in lift, an increase in drag and very rarely, catastrophic failure. As such, determining the aeroelastic characteristics of a wing is key to reduce the risk of structural failure. By modifying certain key aspects of Prandtl’s Lifting Line model, this study presents an unsteady three-dimensional aerodynamic model and its application in aeroelasticity. This report explains how the mathematical model is developed, the theories that it is grounded upon, and the results of the MATLAB simulations of the model. This mathematical method shows good agreement when compared with Theodorsen’s unsteady aerodynamics. It is also able to exhibit quick changes of aerodynamic lift due to a heaving or bending wing. By coupling this aerodynamic model with a lumped mass model, the aeroelastic system is able to show the vibrational characteristics of a straight wing due to a three-dimensional lift distribution. However, there are several limitations to this study. Structural torsional twist is neglected in the calculations, and the model is only applicable to straight wings. Nonetheless, future work could be done on this study to expound its limitations and downfalls. Bachelor of Engineering (Aerospace Engineering) 2020-06-11T07:26:48Z 2020-06-11T07:26:48Z 2020 Final Year Project (FYP) https://hdl.handle.net/10356/141883 en A018 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Aeronautical engineering::Aerodynamics
spellingShingle Engineering::Aeronautical engineering::Aerodynamics
Chow, Earl Jun Zhong
Development of unsteady three-dimensional lifting line model and its application in aeroelasticity
description Most fixed wing aircraft face a dangerous consequence of speed: aeroelasticity. Aeroelastic vibration can lead to a loss in lift, an increase in drag and very rarely, catastrophic failure. As such, determining the aeroelastic characteristics of a wing is key to reduce the risk of structural failure. By modifying certain key aspects of Prandtl’s Lifting Line model, this study presents an unsteady three-dimensional aerodynamic model and its application in aeroelasticity. This report explains how the mathematical model is developed, the theories that it is grounded upon, and the results of the MATLAB simulations of the model. This mathematical method shows good agreement when compared with Theodorsen’s unsteady aerodynamics. It is also able to exhibit quick changes of aerodynamic lift due to a heaving or bending wing. By coupling this aerodynamic model with a lumped mass model, the aeroelastic system is able to show the vibrational characteristics of a straight wing due to a three-dimensional lift distribution. However, there are several limitations to this study. Structural torsional twist is neglected in the calculations, and the model is only applicable to straight wings. Nonetheless, future work could be done on this study to expound its limitations and downfalls.
author2 Basman Elhadidi
author_facet Basman Elhadidi
Chow, Earl Jun Zhong
format Final Year Project
author Chow, Earl Jun Zhong
author_sort Chow, Earl Jun Zhong
title Development of unsteady three-dimensional lifting line model and its application in aeroelasticity
title_short Development of unsteady three-dimensional lifting line model and its application in aeroelasticity
title_full Development of unsteady three-dimensional lifting line model and its application in aeroelasticity
title_fullStr Development of unsteady three-dimensional lifting line model and its application in aeroelasticity
title_full_unstemmed Development of unsteady three-dimensional lifting line model and its application in aeroelasticity
title_sort development of unsteady three-dimensional lifting line model and its application in aeroelasticity
publisher Nanyang Technological University
publishDate 2020
url https://hdl.handle.net/10356/141883
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