High Gravity Influence on Boiling Heat Transfer in Helical Coils

Xie, Liyao, Xie, Yongqi, Wu, Hongwei and Yu, Jianzu (2014) High Gravity Influence on Boiling Heat Transfer in Helical Coils. International Journal of Heat and Mass Transfer, 73. pp. 706-715. ISSN 0017-9310

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Abstract

Experiments were conducted to investigate the flow boiling heat transfer in helical coils under high gravity operating conditions. The centrifuge used for this study has a two meter-long arm allowing providing the high gravity up to 11 g. The heat flux can be up to 15100 W m−2 and the mass velocity ranging from 40 to 200 kg m−2 s−1, and the outlet quality ranging from 0% to 50%. Flow visualization and wall superheat in two high gravity direction configurations were analyzed. Experimental results showed that the high gravity acceleration had an adverse superheat influence on the flow boiling heat transfer, particularly at the low mass and the low vapor quality. The heat transfer in radial acceleration configuration was found to be superior to that in axial configuration. The helical coil curvature in itself could be utilized as a high gravity resistance.

Item Type:	Article
Uncontrolled Keywords:	Boiling; Heat transfer; High gravity; Acceleration; Helical coil
Subjects:	H100 General Engineering
Department:	Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User:	Hongwei Wu
Date Deposited:	20 Nov 2015 14:20
Last Modified:	12 Oct 2019 23:11
URI:	http://nrl.northumbria.ac.uk/id/eprint/24622

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