Publication Date
2013
Document Type
Thesis
Committee Members
Haibo Dong (Advisor), Hui Wan (Committee Member), Zifeng Yang (Committee Member)
Degree Name
Master of Science in Engineering (MSEgr)
Abstract
Insect wing damage resulted from living environment or predation commonly happens in nature. This usually results in deterioration of insect's flight performance and as a consequence, the insect needs adjustment of flapping wings to compensate the effect from the wing loss. In this study, a dragonfly (Erythemis simpliciolis) with and without wing loss is chosen to study the change of aerodynamic performance of flapping wings. Three cases including flight with intact wings (IW), flight with one-sided forewing damage (OFD), and flight with double-side forewing damage (DFD) are determined. An integrated study using high-speed photogrammetry, three-dimensional surface reconstruction, and direct numerical simulation (DNS) are used to quantify wing kinematics and aerodynamics performance. Results have shown that in general, during downstroke of forewings, forewing area loss could reduce insect's lift production; The lift force generated by the outer wings is larger than or equal to that produced by the inner wings during downstroke, but the outer wings' lift production becomes smaller than the inner wings' during upstroke; Span-wise forewing area removal reduces forewing tip vorticity, and it leads to the detachment of the tip vortex ring during upstroke.
Page Count
64
Department or Program
Department of Mechanical and Materials Engineering
Year Degree Awarded
2013
Copyright
Copyright 2013, some rights reserved. My ETD may be copied and distributed only for non-commercial purposes and may be modified only if the modified version is distributed with these same permissions. All use must give me credit as the original author.
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.
