Experimental study of heat-transfer enhancement in turbulent natural convection along a vertical flat plate; Part 1: The effect of injection and suction
- Ibaraki Univ. (Japan)
To attain a high enhancement rate in convective heat transfer, deformation or destruction of the boundary layer by some methods, including active and passive enhancement methods, is a necessary condition. For instance, the application of fluid injection or suction to the temperature field is one of the most fundamental active methods. Although several attempts of heat-transfer enhancement have been investigated in laminar and turbulent forced convection, any effective enhancement techniques for heat transfer of turbulent natural convection have not yet been discussed. In particular, it is important to analyze its enhancement mechanism when only natural convection is applicable to cooling. In this paper, therefore, fluid injection and suction were added to turbulent natural convection along a vertical flat plate, and then the possibility of its heat-transfer enhancement was investigated. It was found that the local Nusselt numbers affected by fluid injection and suction were 1.5 [approximately] 1.6 times as much as those for pure turbulent natural convection.
- OSTI ID:
- 5033403
- Journal Information:
- Heat Transfer - Japanese Research; (United States), Vol. 22:4; ISSN 0096-0802
- Country of Publication:
- United States
- Language:
- English
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