Heat transfer in the turbulent boundary layer with a short strip of surface roughness
- Mississippi State University, Mississippi State (United States)
The effects of a short strip of surface roughness on heat transfer and fluid flow in the turbulent boundary layer are investigated experimentally. This is done by measuring Stanton number and skin friction distributions and mean velocity, turbulence intensity, and mean temperature profiles in a turbulent boundary layer where the first 0.7 m length is smooth, the next 0.2 m is roughened with 1.27 mm hemispheres spaced 2 base diameters apart and the final 1.5 m is smooth. These results are compared with previously published data from experiments wiht a rough leading portion and smooth final portion and from experiments on an all-smooth surface. The influence of the roughness is large in the neighborhood of the rough strip, but the Stanton number and skin friction distributions are seen to quickly recover smooth-wall behavior downstream of the rough strip. 19 refs.
- OSTI ID:
- 5648802
- Report Number(s):
- AIAA-Paper-92-0249; CONF-920157-
- Resource Relation:
- Conference: 30. American Institute of Astronautics and Aeronautics (AIAA) aerospace sciences meeting and exhibit, Reno, NV (United States), 6-9 Jan 1992
- Country of Publication:
- United States
- Language:
- English
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