The effect of turbulence on heat transfer from heated cylinders
Abstract
Data are obtained for the effect of free-stream turbulence on heat transfer from heated cylinders placed normal to an air stream. Tests were conducted for a Reynolds-number range from 109,000 to 302,000 at values of turbulence intensity from 0.40 to 14.20%. The structure of the free-stream is characterized, and the effects of the artificially induced turbulence on both the local and overall heat transfer are determined. A correlation equation is presented that enables the stagnation-point heat transfer to be determined as a function of turbulence intensity. The augmentation of heat transfer through the laminar boundary layer is also determined as a function of turbulence intensity. Attempts to determine the effect of turbulence intensity on the overall or average heat transfer were partially successful. A correlation equation is presented for predicting the overall heat transfer as a function of turbulence intensity over a narrow range of correlation parameters.
- Publication:
-
International Journal of Heat and Mass Transfer
- Pub Date:
- November 1975
- DOI:
- 10.1016/0017-9310(75)90231-8
- Bibcode:
- 1975IJHMT..18.1229L
- Keywords:
-
- Convective Heat Transfer;
- Cross Flow;
- Cylindrical Bodies;
- Forced Convection;
- Laminar Boundary Layer;
- Turbulence Effects;
- Bibliographies;
- Correlation Coefficients;
- Free Flow;
- Graphs (Charts);
- Nusselt Number;
- Reynolds Number;
- Stagnation Point;
- Turbulent Flow;
- Wind Tunnel Tests;
- Fluid Mechanics and Heat Transfer