Turbulent flow through spacer grids in rod bundles

被引：51
|
作者：
Yang, SK [1 ]
Chung, MK [1 ]
机构：
[1] Korea Atom Energy Res Inst, Thermal Hydraul Safety Res Team, Taejon 305600, South Korea
来源：
JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME | 1998年 / 120卷 / 04期
关键词：
D O I：
10.1115/1.2820739
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effects of the spacer grids with mixing vanes in rod bundles on the turbulent structure were investigated experimentally. The detailed hydraulic characteristics in subchannels of a 5 X 5 rod bundle with mixing spacer grids were measured upstream and downstream of the spacer grid by using a one component LDV(Laser Doppler Velocimetry). Axial velocity and turbulent intensity, skewness factor and flatness factor were measured The turbulence decay behind spacer grids was obtained from measured data. The trend of turbulence decay behaves in a similar way as turbulent flow through mesh grids or screens. Pressure drop measurements were also performed to evaluate the loss coefficient for the spacer grid and the friction factor for a rod bundle.
引用
收藏
页码：786 / 791
页数：6
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