Aerodynamics of Cones at High Angles of Attack in Low Subsonic Flow,
Abstract
This report is a theoretical study of various phenomena observed in the low subsonic regime when a slender cone of revolution is pitched to high angles of attack. Three-dimensional boundary layers are calculated up to the line of primary separation. The structure of the separated wake is obtained with a two-dimensional model and the results are used as input in a leeside boundary layer calculation. This calculation is carried on to the line of secondary separation. The positions of separation are compared with experimental results. The wake is found to be unstable at the angles of attack where strong asymmetric forces are observed. A stability analysis of the boundary layer rules out streamwise-directed vortices as a contributor to the asymmetric forces. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 08, 1981
- Accession Number
- ADA115871
Entities
People
- Jan Ivar Botnan
Organizations
- Norwegian Defence Research Establishment