Prediction and experimental evaluation of planar wing spanloads for minimum drag

Wroblewski, Gabrielle E

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https://hdl.handle.net/2142/90675 Copy

Description

Title

Prediction and experimental evaluation of planar wing spanloads for minimum drag

Author(s)

Wroblewski, Gabrielle E

Issue Date

2016-04-28

Director of Research (if dissertation) or Advisor (if thesis)

Ansell, Phillip J.

Department of Study

Aerospace Engineering

Discipline

Aerospace Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• multidisciplinary design optimization
• wake survey method

Abstract

Optimum wing spanloads were evaluated by comparing wing performance values from theoretical predictions and experimental wind-tunnel measurements. The optimum spanloads were found using a Lagrange multiplier optimization method. They were designed with a prescribed wing-root bending moment constraint with and without incorporating viscous representation. Wind-tunnel models were created based on the optimum spanloads and the experiments were conducted to evaluate the changes in drag as the design constraints differed. The results indicate that an optimized spanload having equal lift and wing-root bending moment to that of an elliptically-loaded wing can experience significant decreases in drag. Comparisons between the theoretical predictions and the wind-tunnel models were made using experimental 5-hole probe wake-survey measurements, which were reduced into total lift and drag, as well as spanwise lift distributions.

Graduation Semester

2016-05

Type of Resource

text

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http://hdl.handle.net/2142/90675

Copyright and License Information

Copyright 2016 Gabrielle Wroblewski

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