Accession Number:

ADA022996

Title:

Effect of Local Surface Roughness on Turbulent Boundary Layer-Wall Pressure Spectra and Transition Burst Onset.

Descriptive Note:

Formal rept.,

Corporate Author:

DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD

Report Date:

1975-12-01

Pagination or Media Count:

67.0

Abstract:

An experimental study of boundary-layer velocity profiles and turbulent wall-pressure spectra on a smooth flat plate with varying localized roughness conditions is reported. The sandpaper surface roughness ranged from a smooth wall to the fully rough condition. Transition and turbulent flow data are consistent with those in the published literature. In addition, new data have been obtained for the wall-pressure spectra for a complete range of roughness conditions. Formulas for estimating the increase in wall spectra levels due to varying surface-roughness conditions are presented.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE