Relation between the Fluctuating Wall Pressure and the Turbulent Structure of a Boundary Layer on a Cylinder in Axial Flow
Abstract
The turbulent flow structures responsible for the fluctuating wall pressure in the turbulent boundary layer on a cylinder in axial flow (delta/a = 5.04, Re sub Theta = 2870) have been investigated. Simultaneous measurements of the fluctuating wall pressure and turbulent streamwise velocities have been performed throughout a large volume of the boundary layer (y(+) = 14 to y/delta = 1.91, 0 < or = x/delta < or = 1.52, azimuthal angle phi = O deg, 20 deg, 40 deg) with a subminiature electret microphone (d(+) = 25.9) and hotwire velocity probe (1(+) = 18.5). Pressure-velocity cross-spectra and cross-correlation measurements indicate that two primary groups of pressure fluctuations exist in the cylindrical boundary layer: (1) small-scale, high-frequency disturbances concentrated close to the wall associated with the burst-sweep cycle and (2) large-scale, low-frequency disturbances extending from the wall to the turbulent/potential-flow interface that are consistent with a large Turbulence structure, Turbulent boundary layer, Cylindrical boundary layer, Transverse curvature, Wall pressure fluctuation
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 12, 1993
- Accession Number
- ADA270242
Entities
People
- Stephen R. Snarski
Organizations
- Northwestern University