Influence of free-stream turbulence on turbulent boundary layer heat transfer and mean profile development. I - Experimental data. II - Analysis of results
Abstract
The effect of free stream turbulence on the heat transfer in the boundary layer flow was examined in a zero pressure gradient, two-dimensional channel. A heated flat plate was instrumented for turbulence intensity measurements. The free stream turbulence intensity distributions, turbulence length scale distributions, and power spectral density distributions were quantified. The two dimensionality of the test boundary layers was verified in various test conditions and the Stanton number distributions were measured for five free stream turbulence levels as a function of Re. The skin friction number was also determined as a function of the momentum thickness Re at specific locations. The test data were found to agree well with two-dimensional, incompressible analytical predictions and correlations. The free stream turbulence was determined to have significant effect on the skin friction and heat transfer, e.g., up to a 20% increase in friction for a turbulence intensity of 6%.
- Publication:
-
ASME Journal of Heat Transfer
- Pub Date:
- February 1983
- Bibcode:
- 1983ATJHT.105...33B
- Keywords:
-
- Convective Heat Transfer;
- Free Flow;
- Temperature Profiles;
- Thermal Boundary Layer;
- Turbulence Effects;
- Turbulent Boundary Layer;
- Turbulent Heat Transfer;
- Airfoils;
- Flow Velocity;
- Heat Transfer Coefficients;
- Reynolds Number;
- Skin Friction;
- Stanton Number;
- Two Dimensional Boundary Layer;
- Wall Flow;
- Wind Tunnel Tests;
- Fluid Mechanics and Heat Transfer