Experimental Study of the Turbulence Production Mechanism in Boundary Layer Flows
Abstract
Progress has been made in experimental techniques, in data acquisition and film quality, in data reduction, in our data base of simultaneous visual and point measurements, and in our knowledge of the physics of turbulence production. We have learned how to make our laser sheets thinner than previously attained by using both mirrors and lenses. We have learned how to obtain 'almost' continuous data records up to 96 k bytes. We have changed to use of the new non-silvered base Kodak films and now can achieve a better uniformity of image in both the flood and laser sheets. The turbulent boundary layer data was run through the turbulent detection schemes of Zaric. We found that there was a close correspondence between his detection technique and the passage of pockets. The most important results of our investigations to date have been: 1) Vortices of the scale of 100 1(+) exist above pockets during their formation stage (pockets are the footprints of the turbulence production process). 2) These vortices come in pairs, having both downstream and upstream facing orientations. (edc)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1982
- Accession Number
- ADA215404
Entities
People
- R. E. Falco
Organizations
- Michigan State University