Local heat transfer in a rotating square channel with jet impingement
Jet impingement cooling has long been an area of active research, and with an ever-increasing scope of applications, the field continues to attract plenty of attention. The influence of rotation and jet mass flow rate on the local heat transfer coefficient for a single confined impinging round jet with a fixed jet-to-wall spacing of H/d = 5 was studied for the jet Reynolds number from 6,500 to 26,000 and the rotational Reynolds number from 0 to 112,000. The local heat transfer coefficient along the surface is measured and the effect of the rotation on the stagnation (peak) point, local and average Nusselt number, is presented and discussed. Furthermore, a correlation was developed for the average Nusselt number in terms of the parameters of Re{sub j} and Re{sub {Omega}}. In general, the combined jet impingement and rotation effect are shown to affect the heat transfer response. Rotation decreases the average Nusselt number values from 15 to 25% in outward and inward radial flow, respectively. Finally, comparisons of the present data with existing results for multijets with rotation were also made.
- Research Organization:
- National Sun Yat-Sen Univ., Kaohsiung (TW)
- OSTI ID:
- 20005621
- Journal Information:
- Journal of Heat Transfer, Journal Name: Journal of Heat Transfer Journal Issue: 4 Vol. 121; ISSN 0022-1481; ISSN JHTRAO
- Country of Publication:
- United States
- Language:
- English
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