WALL PRESSURE FLUCTUATIONS BENEATH AN AXIALLY SYMMETRIC TURBULENT BOUNDARY LAYER ON A CYLINDER.
Abstract
Measurements of the turbulent pressure field on the outer surface of a 3 inch diameter cylinder were made at a point 24 feet downstream of the origin of the turbulent boundary layer. The root-mean square wall pressure was 2.42 times the wall shear stress. The normalized power spectrum at high frequencies contained twice the energy density of the spectrum beneath a plane boundary layer. The convection speed was the same as that in a plane boundary layer but the eddy size was smaller by a factor of two. The smaller eddy size and unchanged convection speed account for the greater energy in the spectrum at high frequencies. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1969
- Accession Number
- AD0693508
Entities
People
- Chi-sheng Yang
- William W. Willmarth
Organizations
- University of Michigan