This paper presents the experimental results on heat transfer characteristics of air forced convection over not-thin plates with transverse and skewed ribs; data are obtained by means of infrared thermography. Compari¬sons of heat transfer distributions for ribbed plates with data over a flat plate suggest the following observations. The periodic development of the boundary layer is very well displayed by the local distribution of the convective heat transfer coefficient; for both enhanced surfaces, the average Nusselt number shows the same dependence on the Reynolds number than the flat plate; the en¬hancement factor is about 1.4 for both ribbed configura¬tion, without appreciable differences between them.

Heat transfer measurements by IR thermography over enhanced surfaces with skewed ribs

NIRO, ALFONSO
2009

Abstract

This paper presents the experimental results on heat transfer characteristics of air forced convection over not-thin plates with transverse and skewed ribs; data are obtained by means of infrared thermography. Compari¬sons of heat transfer distributions for ribbed plates with data over a flat plate suggest the following observations. The periodic development of the boundary layer is very well displayed by the local distribution of the convective heat transfer coefficient; for both enhanced surfaces, the average Nusselt number shows the same dependence on the Reynolds number than the flat plate; the en¬hancement factor is about 1.4 for both ribbed configura¬tion, without appreciable differences between them.
Proc. of the 27th UIT National Heat Transfer Conference
9788874883127
Heat transfer enhancement; ribs; IR-thermography
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/502579
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