Masters Theses

Abstract

"A computational study of two-dimensional and three-dimensional wings at Reynolds numbers corresponding to insect flight regime is presented. The unsteady flow structures around the wings are observed. The dominance of the vortex structures on the forces experienced by the wings is emphasized. The time-accurate, unsteady simulation results are analyzed and the phase relations of the leading edge and trailing edge vortex (LEV/TEV) dynamics to the variation oflift are established. At low angles of attack the TEV dominates and at higher angles of attack, both LEV and TEV are equally dominant. Relevant experimental and computational results from literature are discussed for a comparison of the results obtained in this study. A phase relationship is established between the force coefficients and vortex transport. An attempt is made to obtain the optimal wing flapping frequency for maximum lift.

Results suggest that the wings have higher lift coefficient at high angles of attack at low Reynolds numbers compared to that at higher Reynolds numbers at which planes operate. Analyses indicate that by matching the flapping frequency to the vortex shedding frequency, the low lift phase can be avoided"-- Abstract, p. iii

Advisor(s)

Isaac, Kakkattukuzhy M.

Committee Member(s)

Alofs, Darryl J.
Hering, Roger H.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering

Publisher

University of Missouri--Rolla

Publication Date

Fall 2003

Pagination

x, 54 pages

Note about bibliography

Includes bibliographical references (pages 51-53)

Rights

© 2003 Pavan Kumar Shivaram, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Subject Headings

Oscillating wings (Aerodynamics)Lift (Aerodynamics)Reynolds numberNumerical analysis

Thesis Number

T 8388

Print OCLC #

55132137

Download
Off-campus S&T users

Share My Thesis If you are the author of this work and would like to grant permission to make it openly accessible to all, please click the button above.

Share

 
COinS