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The goertler instability on an airfoil
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hepner, T. E. Mangalam, S. M. Meyers, J. F. Dagenhart, J. R. |
| Copyright Year | 1985 |
| Description | Goertler vortices arise in boundary layers along concave surfaces due to centrifugal effects. This paper presents some results of an experiment conducted to study the development of these vortices on an airfoil with a pressure gradient in the concave region where an attached laminar boundary layer was insured with suction through a perforated panel. The sublimating chemical technique was used to visualize Goertler vortices and the velocity field was measured by laser velocimetry. The vortex wavelength clearly varied with Goertler number as predicted by linear theory. Both flow visualization and velocity measurements indicated vortex damping in the convex zone. Secondary instability was observed at the higher Goertler numbers. |
| File Size | 296214 |
| Page Count | 23 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040161536 |
| Archival Resource Key | ark:/13960/t5r837520 |
| Language | English |
| Publisher Date | 1985-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aeronautics (general) Laminar Boundary Layer Laser Doppler Velocimeters Perforated Plates Vorticity Wind Tunnel Tests Flow Visualization Pressure Distribution Centrifugal Force Airfoils Goertler Instability Boundary Layer Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
