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Pressure Loss and Forced Convective Heat Transfer in an Annulus Filled with Aluminum Foam  

Noh Joo-Suk (Department of Indoor Environment System, Kyonggi Institute of Technology)
Lee Kye-Bock (School of Mechanical Engineering, Chungbuk National University)
Lee Chung-Gu (Department of Indoor Environment System, Kyonggi Institute of Technology)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.17, no.9, 2005 , pp. 855-862 More about this Journal
Abstract
An experimental investigation has been carried out for aluminum foam heat sink inserted into the annulus to examine the feasibility as a heat sink for high performance forced water cooling in the annulus. The local wall temperature distribution, inlet and outlet pressures and temperatures, and heat transfer coefficients were measured for heat flux of 13.6, 18.9, 25.1, 31.4 $kw/m^2$ and Reynolds number ranged from 120 to 2000. Experimental results show that the friction factor is higher than clear annulus without aluminum foam, while the significant augmentation in Nu is obtained. This technique can be used for the compactness of the heat exchanger.
Keywords
Annulus flow; Nusselt number; Friction factor; Permeability; Aluminum foam; Heat flux;
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