Numerical investigation on temperature fluctuation of the parallel triple-jet

被引：30
作者：
Cao, Qiong [1 ]
Lu, Daogang [1 ]
Lv, Jing [1 ]
机构：
[1] N China Elect Power Univ, Sch Nucl Sci & Engn, Beijing 102206, Peoples R China
来源：
NUCLEAR ENGINEERING AND DESIGN | 2012年 / 249卷
关键词：
THERMAL-SHOCK; MIXING TEE; FATIGUE; STRESS; LES;
D O I：
10.1016/j.nucengdes.2011.07.018
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：
Temperature fluctuation is caused by the mixing flows out of the core with different temperature in upper plenum. The phenomenon may lead to thermal fatigue in solid structures. In this paper, the parallel triple-jet flows were simulated by the software FLUENT with the large eddy simulation (LES). By comparison, the numerical results were in good agreement with the experimental ones. The flow field observed in simulation showed that many vortices are closely related with the temperature fluctuation phenomenon. From the computed results, it was discovered that amplitudes of temperature fluctuation are different in flow field, while the frequency of temperature fluctuation remains constant at all monitoring position. With the increasing of Reynolds number, the mixing of hot and cold flows is delayed, and convective mixing region is enlarged. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：82 / 89
页数：8
相关论文
共 16 条
  • [1] THERMAL-SHOCK IN NUCLEAR-REACTORS
    CLAYTON, AM
    [J]. PROGRESS IN NUCLEAR ENERGY, 1983, 12 (01) : 57 - 83
  • [2] LES benchmark study of high cycle temperature fluctuations caused by thermal striping in a mixing tee
    Hu, LW
    Kazimi, MS
    [J]. INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2006, 27 (01) : 54 - 64
  • [3] Jones L.S., 2009, ENG FRACT MECH, V55, P795
  • [4] Kimura N., 2001, 8 INT S FLOW MOD TUR, P651
  • [5] Numerical analysis of thermal striping induced high cycle thermal fatigue in a mixing tee
    Lee, Jeong Ik
    Hu, Lin-wen
    Saha, Pradip
    Kazimi, Mujid S.
    [J]. NUCLEAR ENGINEERING AND DESIGN, 2009, 239 (05) : 833 - 839
  • [6] Lloyd G.J., 1980, International Journal of Pressure Vessels and Piping, V8, P255
  • [7] [陆道纲 Lu Daogang], 2010, [原子能科学技术, Atomic Energy Science and Technology], V44, P40
  • [8] Large-eddy simulations (LES) of temperature fluctuations in a mixing tee with/without a porous medium
    Lu, T.
    Jiang, P. X.
    Guo, Z. J.
    Zhang, Y. W.
    Li, H.
    [J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2010, 53 (21-22) : 4458 - 4466
  • [9] LOADING CONDITIONS IN HORIZONTAL FEEDWATER PIPES OF LWRS INFLUENCED BY THERMAL-SHOCK AND THERMAL STRATIFICATION EFFECTS
    MIKSCH, M
    LENZ, E
    LOHBERG, R
    [J]. NUCLEAR ENGINEERING AND DESIGN, 1985, 84 (02) : 179 - 187
  • [10] HYDRAULIC SIMILARITY IN THE TEMPERATURE-FLUCTUATION PHENOMENA OF NONISOTHERMAL COAXIAL JETS
    MORIYA, S
    OHSHIMA, I
    [J]. NUCLEAR ENGINEERING AND DESIGN, 1990, 120 (2-3) : 385 - 393
12