An analysis method for the viscous/inviscid flow around two dimensional multi-element aerofoils including surface roughness effects

A computer program is developed to implement a numerical solution of the incompressible, steady flow around two dimensional multi-element aerofoils having a rough or smooth surface.The potential flow over the aerofoil is solved by replacing the aerofoil contour with a polygon of plane panels and using linear distributed vorticity on the panels to represent the aerofoil. Boundary layer effects are included in the calculation by utilizing linear distributions of sources on the panels to model the displacement effects due to the boundary layer. Boundary layer development is calculated using Thwaites' method for the laminar portion of the boundary layer and Head's entrainment method for the turbulent portion of the boundary layer. Empirical correlations are used to predict transition. A modified skin friction law accounts for the effects of roughness on the wall shear stress. The boundary layer development calculation must make use of static pressure distributions calculated by the potential flow analysis. An iterative solution procedure is thus required with the source distribution in the potential flow analysis being determined from the preceding pass through the boundary layer development calculationroutine.

Name thesis:degree_name

Master of Engineering (M.Eng.)

Level thesis:degree_level

Master's

Discipline thesis:degree_discipline

Engineering, Mechanical

Grantor dc:publisher

Carleton University

Year dc:date.issued

1978

Author dc:creator

• Choo, David D.

Statement dc:rights

• Copyright © 1978 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.

Language dc:language.iso

en

DOI

10.22215/etd/1978-12449

OAI identifier oai:identifier

oai:carleton.scholaris.ca:20.500.14718/27276