Thermal and hydraulic performance of a rectangular duct with multiple V-shaped ribs
- Chalmers Univ. of Technology, Goteborg (Sweden). Dept. of Thermo and Fluid Dynamics
- Lund Inst. of Tech. (Sweden). Div. of Heat Transfer
Experiments have been carried out to investigate the performance of a new swirl flow duct which is suitable for compact heat exchanges. The ducts tested have rectangular cross sections with aspect ratio 1 to 8, and multiple V-shaped ribs are attached to the wide walls in a staggered arrangement such that multiple V-shaped ribs may provide greater heat transfer enhancement than angled straight ribs and V-shaped ribs at Reynolds numbers below 2000. The data are presented as j and f factors for Reynolds numbers from 500 to 15,000, and correlations are obtained for the influence of rib height (0.1 < e/H < 0.2), rib pitch (3 < p/H < 7), and rib angle (15 deg < {phi} < 45 deg). It was found that a rib angle of 45 deg provided the highest j/f ratio, while increasing the rib height or decreasing the rib pitch lowers the j/f ratio.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 320982
- Journal Information:
- Journal of Heat Transfer, Journal Name: Journal of Heat Transfer Journal Issue: 4 Vol. 120; ISSN JHTRAO; ISSN 0022-1481
- Country of Publication:
- United States
- Language:
- English
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