Experimental Axisymmetric Boundary-Layer Profile Modifications by the Addition of Surface Roughness Screens.
Abstract
The boundary-layer velocity profile on an axisymmetric aerodynamic body was modified by the use of surface roughness screens. The velocity profiles were measured at a body location of x/L=0.970 for various screen configurations placed near the nose. These results obtained in air, were determined to allow the simulation of the boundary-layer velocity profile on longer models at different Reynolds numbers. Results were obtained for three different screen mesh sizes and three screen lengths up to 60.96 cm (24 inches) in different configurations. The following boundary-layer characteristics are given for each configuration: boundary-layer thickness, planar displacement and momentum thickness, axisymmetric displacement and momentum thickness, planar and axisymmetric shape factor, friction velocity, skin friction coefficient, wall shear stress, and the planar universal boundary-layer parameters. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 24, 1978
- Accession Number
- ADA061470
Entities
People
- B. E. Robbins
Organizations
- Pennsylvania State University