Characteristics of the Sidewall and Floor Boundary Layers in BRL Supersonic Wind Tunnel Number 1.
Abstract
Pitot pressure surveys have been taken to characterize the floor and sidewall boundary layers in this tunnel at free stream mach numbers, m = 1.50, 2.50, 3.50 and 4.50. The boundary-layer surveys cover the complete unit Reynolds number operating range of the facility. These surveys have been used to obtain Mach number distributions, mean velocity profiles and boundary-layer thicknesses. The data show that the sidewall and floor boundary layers have quite different thicknesses at the lowest tunnel supply pressures at m - 3.50 and (probably) 4.50. The boundary-layer thicknesses are not very different for other conditions. the sidewall profiles show considerable variation with M for a fixed momentum thickness Reynolds number; the floor profiles show less variation. Pressure gradient differences in the upstream flow may be responsible for the different characteristics of the sidewall and floor boundary layers. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1975
- Accession Number
- ADB008566
Entities
People
- Clarence C. Bush
- Clarence W. Kitchens Jr.
- Raymond Dedney
Organizations
- Ballistic Research Laboratory