Publication de 8 numéros par an
ISSN Imprimer: 1065-5131
ISSN En ligne: 1563-5074
Indexed in
Heat Transfer Enhancement from a Surface Affixed with Rectangular Fins of Different Patterns and Arrangement in Duct Flow
RÉSUMÉ
Experiments were performed to investigate the heat transfer and fluid flow characteristics of a surface with arrays (7 × 7) of short rectangular plate fins of four different fin patterns co-angular, zigzag, co-rotating, and co-counter rotating for air flow (Re = 15,700-104,500) in a duct. T-type thermocouples and an infrared camera with a 160 × 120 point In−Sb sensor were used to measure the temperature and the detailed heat transfer at the end-wall along with the fin base. A flow behavior and its effect on heat transfer were observed from smoke flow visualization and oil titanium oxide film flow techniques. Horseshoe vortices were formed in front of the fins and longitudinal vortices were generated by the side top edges of the fins while behind the fins rolled-up vortices appeared in every fin pattern. Among the four patterns, the largest friction factor occurred for the co-rotating pattern at a smaller pitch ratio owing to strong flow interactions and combined vortex attack on the end wall and fin surface whereas the least friction developed for the co-angular pattern. The heat transfer result shows that the co-rotating pattern has the highest Nusselt number and the co-angular pattern has the least Nusselt number. Considering the thermal performance, the co-rotating pattern with a smaller pitch ratio is found to be the most recommended pattern as the heat transfer augmentation with the co-rotating pattern is more than three times the finless duct.
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Didarul Islam Md., Oyakawa Kenyu, Kubo Isoroku, Comparative studies on the effect of duct height on heat transfer and flow behavior between co-angular and co-rotating type finned surface, Heat and Mass Transfer, 46, 2, 2009. Crossref
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Islam M.D., Oyakawa K., Yaga M., Kubo I., The influence of channel height on heat transfer enhancement of a co-angular type rectangular finned surface in narrow channel, International Journal of Thermal Sciences, 48, 8, 2009. Crossref
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Islam M.D., Oyakawa K., Yaga M., Kubo I., The Effects of duct height on heat transfer enhancement of a co-rotating type rectangular finned surface in duct, Experimental Thermal and Fluid Science, 33, 2, 2009. Crossref
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Liang G., Islam M.D., Kharoua N., Simmons R., Numerical study of heat transfer and flow behavior in a circular tube fitted with varying arrays of winglet vortex generators, International Journal of Thermal Sciences, 134, 2018. Crossref
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Xu Y., Islam M.D., Kharoua N., Experimental study of thermal performance and flow behaviour with winglet vortex generators in a circular tube, Applied Thermal Engineering, 135, 2018. Crossref
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Zhai C., Islam MD., Alam M.M., Simmons R., Barsoum I., Parametric study of major factors affecting heat transfer enhancement in a circular tube with vortex generator pairs, Applied Thermal Engineering, 153, 2019. Crossref
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Saha Sujoy Kumar, Ranjan Hrishiraj, Emani Madhu Sruthi, Bharti Anand Kumar, Round Tubes Having Plain-Plate Fins, in Heat Transfer Enhancement in Externally Finned Tubes and Internally Finned Tubes and Annuli, 2020. Crossref
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Zhai C., Islam M.D., Simmons R., Barsoum I., Heat transfer augmentation in a circular tube with delta winglet vortex generator pairs, International Journal of Thermal Sciences, 140, 2019. Crossref
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Islam Md., Nurizki A., Barsoum I., Ayish Nader, Simmons R., Experimental study of heat transfer and flow of delta winglets inline arrays in a tube heat exchanger for enhanced heat transfer, Heat Transfer, 50, 4, 2021. Crossref
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Liang G., Islam Md., Alam Md. Mahbub, Barsoum Imad, An experimental study of heat transfer enhancement with winglets inside a tube, Heat and Mass Transfer, 57, 8, 2021. Crossref
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Bora Binay Bhushan, Zeeshan Mohd, Nath Sujit, Bhanja Dipankar, Numerical Modelling and Thermohydraulic Analysis of Circular Pipe Having Internal Vortex Generators, in Recent Advances in Mechanical Engineering, 2021. Crossref