Date of Award

Fall 1980

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Mechanical & Aerospace Engineering

Program/Concentration

Mechanical Engineering

Committee Director

Osama A. Kandil

Committee Member

E. Carson Yates, Jr.

Committee Member

Gene L. Goglia

Call Number for Print

Special Collections; LD4331.E56C53

Abstract

A Nonlinear Hybrid-Vortex method (NHV-method) has been developed for predicting the aerodynamic characteristics of wings exhibiting side-edge separations. The present method is a coupline between vortex-panel and vortex-line methods. In the near-field calculations, vortex panels are used while in the far-field calculat1ons, vortex lines are used.

The wing and its free-shear layers are divided into planar quadrilateral panels having first-order vorticity distribution. The aerodynamic boundary conditions and continuity of the vorticity distributions are imposed at certain nodal points on the panels. An iterative technique is used to satisfy these conditions to obtain the vorticity distributions and the wake shape as well. To expedite the convergence of the iterative technique and to avoid excessive distortions of the free-vortex panels, good initial guesses of the shapes of the free­ vortex sheets, obtained from the Nonlinear Discrete-Vortex method (NDV method), were used.

This method is used to calculate the distributed and total steady loads on thin flat rectangular wings of different aspect ratios and at different angles of attack. The agreement between the calculated results and the available experimental data is satisfactory.

Rights

In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

DOI

10.25777/pkaj-9722

Share

COinS