2 June 2014 Flow and heat transfer of petal shaped double tube
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Proceedings Volume 9234, International Conference on Experimental Mechanics 2013 and Twelfth Asian Conference on Experimental Mechanics; 92340C (2014) https://doi.org/10.1117/12.2052985
Event: International Conference on Experimental Mechanics 2013 and the Twelfth Asian Conference on Experimental Mechanics, 2013, Bangkok, Thailand
Abstract
In this study, the flow and heat transfer characteristics of petal-shaped double tube with 6 petals are examined experimentally for a compact heat exchanger. As results, the heat transfer rate, Q, of the 6 petal shaped double tube (6-p tube) is much larger than that, Qp, of conventional circular double tube in all Reynolds number Rein,h (where, the reference length is hydraulic diameter) ranges. For example, at Rein,h =(0.5~1.0)× 104 it is about 4 times of Qp. The heat transfer enhancement of 6-p tube is by the increase of heat transfer area, wetting perimeter, and a highly fluctuating flow, and Q of the 6-p tube can be expressed by Q [kW/m] = 0.54Rein,h + 2245.
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Toshihiko Shakouchi, Toshihiko Shakouchi, Yuki Kawashima, Yuki Kawashima, Koichi Tsujimoto, Koichi Tsujimoto, Toshitake Ando, Toshitake Ando, } "Flow and heat transfer of petal shaped double tube ", Proc. SPIE 9234, International Conference on Experimental Mechanics 2013 and Twelfth Asian Conference on Experimental Mechanics, 92340C (2 June 2014); doi: 10.1117/12.2052985; https://doi.org/10.1117/12.2052985
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