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堵流工况下棒束子通道流场实验与模拟研究 陈登高.pdf

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堵流工况下棒束子通道流场实验与模拟研究 陈登高.pdf

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文档介绍:: .
原子能科学技物对下游约 范围影响最大 其子通道流速仅有平均流速的约 中心堵流子通
, 0.5 D , 30%,
道流量仅为平均流量的25%左右。使用浸入界面方法模拟了堵流工况,结果表明:该方法能快速有效
地模拟子通道堵流情况 堵塞物带来的局部回流是导致堵流件下游 范围内流速过低的主要原因
, 0.5 D 。
关键词:棒束子通道流场;棒束子通道流量;堵流;数值模拟;浸入界面方法
中图分类号 文献标志码
:TL334    :A   
doi:10.7538/yzk.2022.youxian.0028
Experimental and Numerical Study
of Rod Bundle Sub-channel Flow Field under Blockage
CHEN Denggao,BI Jingliang,HUANG Yanping,
YUAN Dewen,ZAN Yuanfeng,XU Jianjun
(Key Laboratory on Nuclear Reactor Thermal Hydraulics Technology,
Nuclear Power Institute of China,Chengdu610213,China)
Abstract: Experiment study of a 5×5rod bundle was conducted to investigate the effect
of blockage on sub-channel flow field and mass flow rate.A 3×3block was set in a
5×5rod bundle with the largest blocking percent of about 72% in the center sub-
channel.The flow field from 2Dupstream of the blockage center to 5Ddownstream was
measured by particle image velocimetry(PIV)method.Moreover,the mass flow rate of
sub-channel was obtained through a numerical integration using PIV results.At the
same time,numerical method was used to simulate this phenomena.A self-developed
3Dnumerical analysis software called KILI V1.0was used to simulate the blocking
case.This software uses the immersed surface technology with Cartesian grid which
allows directly using of 3Dgeometry from CAD software.3Dflow field was numerically
calculated using NS equations with turbulence modeled by RANS method.Widely used
com