Laser Velocimeter Measurements and Analysis in Turbulent Flows with Combustion. Part 2.
Abstract
Laser velocimeter measurements in the highly turbulent flow field following an axisymmetric sudden expansion have been carried out for both isothermal and reacting flows. Mean streamwise velocity and turbulence intensity profiles covering the region from the sudden expansion to well beyond shear layer reattachment are presented. A study of velocity bias conducted as part of this investigation reconfirmed the effectiveness of the experimental bias elimination technique used in earlier studies. Numerical predictions of the isothermal flow field using the k-epsilon turbulence model were made and compared to experimental measurements. Significant differences in the mean velocity profiles were found to exist, with measured velocities in the central part of the flow being consistently higher than those predicted. Combustion was found to increase mean velocities in regions beyond the combustion zone as expected and to significantly alter the structure of the shear layer. Significant reductions in turbulence intensity were observed throughout most of the flow in the reacting flow case. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1983
- Accession Number
- ADA131882
Entities
People
- H. Doyle Thompson
- R. D. Gould
- Warren H. Stevenson
Organizations
- Purdue University