Receptivity of Boundary Layers to Convected Gusts
Abstract
The primary objective of this study is to determine experimentally the receptivity of a laminar boundary layer to convected gusts. Receptivity is the process by which external disturbances transfer energy to instabilities in the boundary layer. The term convected gust refers to a transient or periodic vortical disturbance convected by the freestream. The experimental approach consisted of hot-wire studies of the boundary layer response to vortical disturbances produced by an array of oscillating ribbons. The boundary layer is remarkably insensitive to large-scale vortical perturbations. No significant Tollmien-Schlichting waves were observed. The vortical disturbances are rapidly damped in the boundary layer and cause only weak oscillations that are primarily of the same frequency and wavelength as the external disturbance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1993
- Accession Number
- ADA267206
Entities
People
- D. E. Parekh