Date of Award:

12-2022

Document Type:

Thesis

Degree Name:

Master of Science (MS)

Department:

Mechanical and Aerospace Engineering

Committee Chair(s)

Douglas F. Hunsaker

Committee

Douglas F. Hunsaker

Committee

Stephen A. Whitmore

Committee

Tianye He

Abstract

The elliptic lift distribution produces the minimum induced drag for a given wingspan and desired lift outside of ground effect. This distribution can be generated on any wing by using geometric and/or aerodynamic twist. However, in ground effect, the elliptic lift distribution is not necessarily that which minimizes induced drag. The present work uses a modern numerical lifting-line algorithm to evaluate how the optimum lift distribution varies as a function of height above ground. The algorithm is also used to obtain the twist distributions that should be applied to wings of varying aspect ratios and taper ratios to produce the optimum lift distribution in ground effect. The results of this work can be used to reduce takeoff distances on morphing wings, or wings that can actively change twist or camber during flight.

Checksum

b99851689546baee6d0ba206d923e9ff

Share

COinS