CFD investigating flow and heat transfer characteristics in a natural circulation loop

Autor:	J.Y. Wang, Yuh-Ming Ferng, T.J. Chuang
Rok vydání:	2013
Předmět:	business.industry Flow (psychology) Thermodynamics Mechanics Thermal stratification Computational fluid dynamics Secondary flow Loop (topology) Natural circulation Nuclear Energy and Engineering Heat transfer Compressibility Environmental science business
Zdroj:	Annals of Nuclear Energy. 58:65-71
ISSN:	0306-4549
DOI:	10.1016/j.anucene.2013.01.015
Popis:	Natural circulation is the most important heat removal mechanism for passive safety systems in new-design nuclear power plants. It is important to investigate the flow and heat transfer characteristics related to the natural circulation mechanism. In this paper, a compressible three-dimensional (3-D) CFD model is proposed to investigate these phenomena in a natural circulation loop. The flow and heat transfer behaviors in a loop can be reasonably captured by the present model, which includes the secondary flow within the elbow and the thermal stratification in the horizontal pipe, etc. This model is also validated with the existing experimental data. Compared with the measured results including time histories of local maximum fluid temperature and temperature difference across the heater, and the relationship between Ress and Grm/NG, the present predicted results show good agreement. These comparisons reveal that the present CFD methodology can be applied in simulating the thermal–hydraulic characteristics related to the natural circulation mechanism in confidence.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e7d22090bdbf4ca2f4b6005003d687bd https://doi.org/10.1016/j.anucene.2013.01.015 Zobrazit plný text záznamu Full Text from ScienceDirect