Free-stream turbulence and pressure gradient effects on heat transfer and boundary layer development on highly cooled surfaces
Abstract
Heat transfer and boundary layer measurements were derived from flows over a cooled flat plate with various free stream turbulence intensities (Tu = 1.6-11 percent), favorable pressure gradients, and cooling intensities, T(w)/T(e) of 1.0-0.53. Special interest is directed towards the effects of the dominant parameters, including the influence on laminar to turbulent boundary transition. It is shown that free stream turbulence and pressure gradients are of primary importance. The increase of heat transfer due to wall cooling can be explained primarily by such property variations as transition, and the influence of free-stream parameters are not affected.
- Publication:
-
29th International Gas Turbine Conference and Exhibit
- Pub Date:
- June 1984
- Bibcode:
- 1984gatu.confR....R
- Keywords:
-
- Boundary Layer Flow;
- Flat Plates;
- Free Flow;
- Heat Transfer;
- Pressure Gradients;
- Wall Flow;
- Boundary Layer Transition;
- Cooling;
- Flow Measurement;
- Reynolds Number;
- Skin Friction;
- Wall Temperature;
- Fluid Mechanics and Heat Transfer