Experimental Study of Forced- Convection from Horizontal Rectangular Fins Array into Air Duct
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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References
Toh, K.C. and Ong, Y.K. “Forced Convection Heat Transfer from Vertically Stacked Fin Arrays with a Shrouding Wall “, International Communications in Heat and Mass Transfer Journal, Vol. 19, Issue 3, pp.373-384, 1992.
Barhatte, S.H., Chopade, M.R. and Kapatkar, V. N., “Experimental and Computational Analysis and Optimization for Heat Transfer Through Fins with Different Types of Notch “, Journal of Engineering Research and Studies, V. 2, Issue 1, pp. 133-138, 2011.
Hossain, M. S., Ahamed, J. U., Akter, F., Das, D. and Soha, S. “Heat Transfer Analysis of Pin Fin Array “, Proceedings of the International Conference on Mechanical Engineering and Renewable Energy, Bangladesh, 24-27 December 2013.
Dhanawade, K. H., Sunnapwar, V. K. and Dhanawade, H. S. “Thermal Analysis of Square and Circular Perforated Fin Arrays by Forced Convection”, International Journal of Current Engineering and Technology, Special Issue-2, pp. 109-114, February 2014.
Sivasubramaniyam, R. "Performance Analysis on Array of Circular Fins through Forced Convection", International Journal of Engineering Research and Technology, Vol. 7, No. 1, pp. 1-8, 2014.
Wankhede, S.D. and Meshram, C.B. "Experimental Study and Investigation of Heat Transfer from Horizontal Rectangular Inverted Notch Fin Arrays (INFAS) under Natural and Forced Convections ", International Journal Researchers, Scientists and Developers, Vol. 2, No. 1, pp. 13-16, 2014.
Baqir, A.S., Qasim, A. and Adnan, A. "Experimental Study for Staggered Perforated Array of Pins Like Fins in a Rectangular Air Cross Flow", The Iraqi Journal for Mechanical and Material Engineering, Vol. 14, No. 2, pp. 261-275, 2014.
Mousa, N. A. "Study on Flow Characteristics and Heat Transfer Behavior around Different Geometrical Corrugated Extended Surfaces", Al-Khwarizmi Engineering Journal, Vol. 11, No. 2, pp. 31-44, 2015.
Mane, S.N. and Mane, S.S. "A Review on Heat Transfer from Different Types of Notch Fin Arrays under Forced Convection to Increase Heat Energy Transfer", International Journal on Recent Technologies in Mechanical and Automobile Engineering, Vol. 2, Issue 6, pp. 15-18, 2015.
Shehab, S.N. Shehab, S.N. "Experimental Simulation of Natural Heat Convection from Finned Vertical Plate with Different Inclinations', Al-Khwarizmi Engineering Journal, Vol. 12, No. 3, pp. 61-71, 2016.
Shehab, S.N. "Experimental Study of Free-Convection from Rectangular Fins Array on a Heated Horizontal Plate with Notch Effects", Al-Nahrain Journal for Engineering Sciences, Vol. 20, No. 1, pp. 140-148, 2017.
Mageswaran, C., Karthikeyan, R. and Muthukumaran, R. "Heat Transfer Enhancement of Perforated Square Pin-Fin Array in a Rectangulr Duc", International Journal for Research in Applied Science and Engineering Technology, Vol. 5, Issue IX, pp. 1826-1832, 2017.
Cengel, Y. A. "Heat Transfer: A Practical Approach", McGraw-Hill Companies, Second Edition, USA, 2008.
Rajput, R.K. "Heat and Mass Transfer", S. Chand and Company LTD., Fifth Revised Edition, India, 2012.
Bejan, A. "Convection Heat Transfer", John Wiley and Sons, Inc., Fourth Edition, USA, 2013.
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