Numerical study on flow and heat transfer characteristics in the rod bundle channels under super critical pressure condition

被引：14

作者：

Yang, Xingbo ^{[1
]}

Su, G. H. ^{[1
]}

Tian, Wenxi ^{[1
]}

Wang, Jiayun ^{[1
]}

Qiu, Suizheng ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Dept Nucl Sci & Technol, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China

来源：

ANNALS OF NUCLEAR ENERGY | 2010年 / 37卷 / 12期

关键词：

Rod bundle channels; Super critical; Heat transfer deterioration; SUPERCRITICAL WATER; LIGHT-WATER; DESIGN;

D O I：

10.1016/j.anucene.2010.07.008

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

In this study, the 3D flow and heat transfer characteristics in rod bundle channels of the super critical water-cooled reactor were numerically investigated using CFX codes. Different turbulent models were evaluated and the flow and heat transfer characteristics in different typical channels were obtained. The effect of pitch-to-diameter ratio (P/D) on the distributions of surface temperature and heat transfer coefficient (HTC) was analysed. For typical quadrilateral channel, it was found that HTC increases with P/D first and then decreases significantly when P/D is <1.4. There exists a "flat region" at the maximum value when P/D is 1.4. If P/D is larger than 1.4, heat transfer deterioration (HTD) occurs as main stream enthalpy is quite small. Furthermore, the HTD under low mass flow rate and the non-uniformity of circumferential temperature were also discussed. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1723 / 1734

页数：12

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