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Aeroelasticity and gust response of wings equipped with a distributed propulsion system

Title:

Aeroelasticity and gust response of wings equipped with a distributed propulsion system

Boissinot, Antoine (2025) Aeroelasticity and gust response of wings equipped with a distributed propulsion system. Masters thesis, Concordia University.

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Abstract

This thesis studies the aeroelastic behaviour of wings designed for urban air mobility (UAM) through sensitivity analyses, parametric studies, flutter envelopes, and gust responses. As urban traffic congestion intensifies, innovative transportation solutions such as UAM vehicles are gaining attention for their accessibility, reliability, travel time, and reduced environmental impacts. However, their lightweight structures and the versatility of their distributed electric propulsion (DEP) system make them somewhat different from conventional aircraft, thus necessitating fresh investigations into the aeroelastic stability and response of UAM vehicles.

The study employs a wing model based on Euler-Bernoulli beam theory, with propulsors represented as follower forces and an unsteady aerodynamic model in the time domain. The governing equations are discretized using Galerkin's method, with the flutter speed and gust response determined via eigenvalue analysis and time integration, respectively. A building-block approach is employed, starting with a clean-wing configuration, followed by single- then multi-propulsor configurations with tiltrotor capabilities, and finalizing with the implementation of the finite aspect ratio effects.

Sensitivity and parametric studies assess the influence of key wing and propulsor parameters on flutter speed. It is found that some parameters significantly reduce flutter speed, with certain cases leading to a 50 % drop or even preventing flight. It is also observed that distributing the propulsion system across the wingspan is beneficial for the stability of the wing, up to a certain value of thrust. Gust response analyses under sharp-edged and 1-cosine profiles reveal that propulsors strongly influence transient and steady-state deformations. Finite aspect ratio effects increase flutter speed values, highlighting the conservatism of strip theory, but also reduce damping, making gust responses worse in some cases. These findings provide design insights for DEP-equipped wings, guiding future UAM aircraft development. Further work will incorporate propeller slipstream effects and configurations optimization strategies.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Mechanical, Industrial and Aerospace Engineering
Item Type:Thesis (Masters)
Authors:Boissinot, Antoine
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Mechanical Engineering
Date:February 2025
Thesis Supervisor(s):Kheiri, Mojtaba
Keywords:Aeroelasticity, DEP, Flutter, Gust Response, UAM, Parametric Study, Tiltrotor
ID Code:995195
Deposited By: Antoine Boissinot
Deposited On:17 Jun 2025 17:10
Last Modified:17 Jun 2025 17:10

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