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Numerical investigation of flow and heat transfer in the sub-channel of an SCWR core with split-vanes

机译:带分流叶片的SCWR堆芯子通道内流动和传热的数值研究

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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/m2s and a heat flux of 800 kW/m2K 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.
机译:在本文中,研究了在25 MPa的压力,1000 kg / m2s的质量比和800 kW / m2K的热通量下,附接到格栅隔板末端的分流叶片对局部流动和传热的影响。超临界水反应堆堆芯的子通道。数值结果表明,三个区域的壁温分布明显不同。在带有分隔叶片的格栅隔板的下游,传热的圆周异质性明显增强。另外,在大的比热区域中,在栅格间隔件的下游存在传热减弱的现象。

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