Master of Science (MS)
First Advisor's Name
First Advisor's Committee Title
Second Advisor's Name
Cheng- Xian Lin
Second Advisor's Committee Title
Third Advisor's Name
Third Advisor's Committee Title
Fourth Advisor's Name
Fourth Advisor's Committee Title
Aerodynamics and fluid mechanics, aeronautical vehicles, applied mechanics, computer-aided engineering and design, energy systems, other aerospace engineering, structures and materials
Date of Defense
Aeroelastic instabilities such as flutter can be accurately captured by state-of-the-art aeroelastic analysis methods and tools. However, these tools and methods fall short in exposing the reasons behind the occurrence of such instabilities. In this research, the constructal law is used to discover the main cause of the variation in the flutter speed and stress distribution for inflected aircraft wings when compared to its uninflected counterpart. This law considers the design as a physics phenomenon and uses an evolutionary flow principle to explain and predict the occurrence of energy flow configurations (i.e. the flow of stresses throughout the structure).
For this study, a flying wing aircraft with different flap-wise wing inflection is considered. The sectional properties for the flying wing configurations are obtained from Variational Asymptotic Beam Sections (VABS) and aeroelastic stability analyses performed in NATASHA (Nonlinear Aeroelastic Trim And Stability of HALE Aircraft). Finally, VABS recovers the flow of stresses throughout the wings. The stability and stress analyses provide insight into the changes in the flow of stresses as the geometry changes. Structural analyses reveal that inflection of the wings has the potential to "smoothen" the flow of stresses i.e. the inflected configuration provides an easier access to the flow of stresses and has less stress strangulation. It is this configuration that is most stable.
Powell, Shanae, "A Constructal Approach to the Design of Inflected Airplane Wings" (2019). FIU Electronic Theses and Dissertations. 4013.
Aerodynamics and Fluid Mechanics Commons, Aeronautical Vehicles Commons, Applied Mechanics Commons, Computer-Aided Engineering and Design Commons, Energy Systems Commons, Other Aerospace Engineering Commons, Structures and Materials Commons
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