Experimental Study of Forced- Convection from Horizontal Rectangular Fins Array into Air Duct

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Saad Najeeb Shehab

Abstract

    In this work, an experimental study has been done to expect the heat characteristics and performance of the forced-convection from a heated horizontal rectangular fins array to air inside a rectangular cross-section duct. Three several configurations of rectangular fins array have been employed. One configuration without notches and perforations (solid) and two configurations with combination of rectangular-notches and circular-perforations for two various area removal percentages from fins namely 18% notches-9% perforations and 9% notches-18% perforations are utilized.  The rectangular fins dimensions and fins number are kept constant. The fins array is heated electrically from the base plate with five different magnitudes of power-inputs. Five several air flow velocity into a duct are utilized. The influence of fin geometry, air flow velocity, Reynolds number and the surface heat flux on the heat-performance of forced heat convection have been simulated and studied experimentally. The experimental data indicates that the combination of 18% rectangular-notched and 9% circular-perforated rectangular fins array gave best forced heat performance in terms of average heat transfer coefficient about (25% - 45%) and (7% - 20%) compared than solid and 9% notches with18% perforations fins array respectively. Five empirical correlations to predict the average Nusselt number for the 18% notches with 9% perforations rectangular fins array at wide range of surface heat flux are deduced. The present data are compared with previous works and a good closeness in behavior is noticed.

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How to Cite
SHEHAB, Saad Najeeb. Experimental Study of Forced- Convection from Horizontal Rectangular Fins Array into Air Duct. Al-Khwarizmi Engineering Journal, [S.l.], v. 15, n. 1, p. 35- 45, mar. 2019. ISSN 2312-0789. Available at: <http://alkej.com/index.php/en/article/view/757>. Date accessed: 23 mar. 2019. doi: https://doi.org/10.22153/kej.2019.07.001.
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References

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