Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Janus, J. Mark

Committee Member

Luke, Edward A.

Committee Member

Thompson, David S.

Date of Degree

12-11-2015

Document Type

Graduate Thesis - Open Access

Major

Computational Engineering (Program)

Degree Name

Master of Science

College

James Worth Bagley College of Engineering

Department

Computational Engineering Program

Abstract

In this study, the effect of a passive trapped-vortex cell on lift to drag (L/D) ratio of an FFA-W3-301 airfoil is studied. The upper surface of the airfoil was modified to incorporate a cavity defined by seven parameters. The L/D ratio of the airfoil is modeled using a radial basis function metamodel. This model is used to find the optimal design parameter values that give the highest L/D. The numerical results indicate that the L/D ratio is most sensitive to the position on an airfoil’s upper surface at which the cavity starts, the position of the end point of the cavity, and the vertical distance of the cavity end point relative to the airfoil surface. The L/D ratio can be improved by locating the cavity start point at the point of separation for a particular angle of attack. The optimal cavity shape (o19_aXX) is also tested for a NACA0024 airfoil.

URI

https://hdl.handle.net/11668/18957

Comments

latin hypercube design||uniform design||discrepancy||radial basis functions||design of experiment||metamodeling||response surface analysis||shape optimization||FFA-W3-301 airfoil||trapped-vortex cell||Loci/CHEM

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