1.Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing 100084, China
2.Engineering Physics Institute, University of Wisconsin Madison, Madison 53706, USA
Corresponding author: firstname.lastname@example.org
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Lei Wu, Hai-Jun Jia, Xi-Zhen Ma, et al. Research on the effect of Reynolds correlation in natural-convection film condensation. [J]. Nuclear Science and Techniques 28(6):85(2017)
Lei Wu, Hai-Jun Jia, Xi-Zhen Ma, et al. Research on the effect of Reynolds correlation in natural-convection film condensation. [J]. Nuclear Science and Techniques 28(6):85(2017) DOI： 10.1007/s41365-017-0240-9.
Film condensation is a vital phenomenon in the nuclear engineering applications, such as the gas-steam pressurizer design, and heat removing on containment in the case of postulated accident. Reynolds number in film condensation can be calculated from either the mass relation or the energy relation, but few researches have distinguished the difference between them at present. This paper studies the effect of Reynolds correlation in the natural convection film condensation on the outer tube. The general forms of the heat transfer coefficient correlation of film condensation are developed in different flow regimes. By simultaneously solving a set of the heat transfer coefficient correlations with ,Re,mass, and ,Re,energy, the general expressions for ,Re,mass, and ,Re,energy, and the relation between the corresponding heat transfer coefficients are obtained. In the laminar and wave-free flow regime,Re,mass, and ,Re,energy, are equivalent, while in the laminar and wavy flow regime,Re,mass, is much smaller than ,Re,energy, and the deviation of the corresponding average heat transfer coefficients is about 30% at the maximum. In the turbulent flow regime, the relation of ,Re,mass, and ,Re,energy, is greatly influenced by Prandtl number. The relative deviation of their average heat transfer coefficients are the non-linear function of Reynolds number and Prandtl number. Compared with experimental results, the heat transfer coefficient calculated from ,Re,energy, is more accurate.
Film condensationReynolds correlationHeat transfer coefficientNatural convection
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