Experimental investigation of heat transfer in curved annular ducts
Abstract
Forced convection heat transfer in a coiled annular duct was investigated experimentally. Average heat transfer coefficients were obtained for both laminar and transition flows. Two coiling diameters and two annulus radius ratios were used in the study. The data was correlated with Dean number and Reynolds separately and compared with the available studies of coiled circular tubes and straight annular ducts. Coiling especially in the laminar regime augments the heat transfer above the straight annulus values; however, the augmentation is less than would be predicted for a coiled circular tube. The augmentation decreases as the flow enters the transition regime.
- Publication:
-
American Society of Mechanical Engineers
- Pub Date:
- December 1984
- Bibcode:
- 1984asme.meetQ....G
- Keywords:
-
- Annular Ducts;
- Computational Fluid Dynamics;
- Convective Flow;
- Convective Heat Transfer;
- Forced Convection;
- Heat Transfer Coefficients;
- Heat Flux;
- Laminar Flow;
- Reynolds Number;
- Specific Heat;
- Thermal Conductivity;
- Fluid Mechanics and Heat Transfer