Analysis of a Three-Dimensional Corner Flow with One Rough Surface
Final rept. 15 Jun 1998-31 Dec 1999
PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB
Pagination or Media Count:
Two and three-dimensional coincident velocity measurements were obtained in a turbulent corner flow at zero axial pressure gradient. Ten thousand coincident velocity ensembles were collected at each measurement location using a three component LDV system in the side-scatter mode. Measurements were made for two corner configurations two hydrodynamically smooth surfaces, and one smooth and one fully rough surface k90. For the smooth-smooth configuration, centerline results compare favorably with classical flat plate data. Secondary flow structures associated with flow along the corner produced modification to the measured Reynolds stresses and triple correlations for the smooth-smooth condition. For the corner flow with one rough surface, the plots of the secondary velocity vectors suggest that the presence of the roughness has disrupted the flow structure.
- Fluid Mechanics