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Experimental Investigation of Heat Transfer and Pressure Drop in Square Metal Packed Duct with Different Boundary Heating | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 30, Issue 6, 2012, Pages 1082-1107 PDF (378.12 K) | ||
| DOI: 10.30684/etj.30.6.13 | ||
| Author | ||
| Kifah H. Hilal | ||
| Abstract | ||
| This paper presents experimental results of forced convection heat transfer and pressure drop across ( 12.5 * 12.5 * 100 cm ) square packed duct. The pad made of forty- eight metallic wrapping coil unit with (0.98 porosity ) and (26 W/m.°C thermal conductivity ). The local surface duct temperature and local heat transfer coefficient distribution, Nusselt number, pressure drop and friction factor were measured for heat flux (0.56 to 2.73 kW/m2) ,Reynolds number (40339 to 54797 ) and three boundary condition of heat flux imposed on duct surface . It was found that Nusselt number increases as Reynold number, heat flux and number of duct surface exposed to heat flux increases. Nusselt number in packed duct is to be ( 1.2 , 1.19 ) times higher than the empty ducts at heating all surface and top & bottom surface of packed duct respectively. Many empirical relation between Reynold number, Nusselt number and pressure drop obtained in this study. | ||
| Keywords | ||
| metal pad | ||
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