摘要
孔板用于压力管道中测量流量,相对于消能作用其特点是过流量小、流速低,而资料介绍的孔板流量系数都由模型实验得出。格鲁吉亚卡杜里电站采用跨流域引水方式,其引水道模型实验中采用此测流方法经济实用。本文采用标准k-ε湍流模型对孔板流场进行数值模拟,得到流速分布和流量系数,通过模型实验对低流速孔板的流量系数进行了验证,两者结果完全一致。在上述电站引水道模型试验中采用孔板测流的流量系数,试验结果完全满足精度要求。
The velocity of flow through the orifice plate to measure the discharge of conduits is lower than which to dissipate energy. The discharge coefficients of orifice introduced in references are determined by experiment. Khadori power station in Georgia takes water from two rivers with a trans-basin diversion system. The method of measuring discharge by orifice is economic and practical which is applied to the model experiment of diversion system, The numerical model is set up to simulate the orifice by standard k-ε turbulence model. The discharge coefficient of de＇signed orifice is measured by the experiment. The distribution of velocity and the discharge coefficient of numerical calculation are well fitted with experimental results. The numerical simulation of the orifice verifies the experiment. The precision of experiment of diversion system of Khadori power station is satisfied to apply the orifice to measure the discharge of conduits.
出处
《水力发电学报》
EI
CSCD
北大核心
2008年第3期105-109,共5页
Journal of Hydroelectric Engineering
关键词
水力学
孔板
流量系数
测流
模型试验
数值模拟
hydraulics
orifice
discharge coefficient
measure discharge
model experiment
numerical simulation
作者简介
刘华（1969-），女，博士研究生，副教授．E—mail：sculiuhua@163．com
