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论文类型：期刊论文

发表时间：2018-12-01

发表刊物：INTERNATIONAL JOURNAL OF LOW-CARBON TECHNOLOGIES

收录刊物：SCIE、Scopus、SCIE、Scopus

卷号：13

期号：4

页面范围：414-423

ISSN号：1748-1317

关键字：supercritical water; heat transfer enhancement; grid spacer with split-vanes; wall temperature

摘要：In this paper, the influence of split-vanes attached to the end of grid spacers on local flow and heat transfer was investigated at a pressure of 25 MPa, a mass rate of 1000 kg/m(2)s and a heat flux of 800 kW/m(2)K for the sub-channels of an supercritical water reactor core. The numerical results show that there are obviously different distributions of wall temperature in three regions. The circumferential heterogeneities of the heat transfer are evidently enhanced at the downstream of the grid spacers with split-vanes. Additionally, there is a phenomenon of weakened heat transfer at the downstream of the grid spacers in the large specific heat region.