18声道超声流量计在DN1000三峡流道模型中的测量准确度研究  

Study on the Accuracy of 18-path Ultrasonic Flowmeter Used in DN1000 Three Gorges Power Plant Penstock Model

作　　者：张亮[1] 孟涛[1] 王池[1] 刘文生 胡鹤鸣[1] 

机构地区：[1]中国计量科学研究院,北京100013 [2]河北省计量监督检测院,河北石家庄050051

出　　处：《计量学报》2011年第B12期91-95,共5页Acta Metrologica Sinica

摘　　要：通过在开封国家水大流量计量站开展DN1000口径三峡模型流道中18声道超声流量计测量准确性实验研究，得到了复杂流场给流量计引入的测量误差，验证了18声道超声流量计即使在复杂流场中依然具有较高的测量准确性。通过分析流量计得到的流速分布图可以推断出模型管道中的流场情况。流量计在正常安装位置旋转90。后测量误差变化不大，流量计测量误差和流速没有明显的相关性。采用CFD辅助设计可以增强模型实验的可靠性。DN1000 Three Gorges power station penstock model experiment was conducted in Kaifeng national large water flow facility to research on the measurement accuracy of 18-path ultrasonic flowmeter. The measurement errors are obtained, which verified the flowmeter had high measurement accuracy even in a complex flow field. The flow field in model penstock was inferred by analyzing the flow velocity distribution obtained from flowmeter. Measurement errors were not sensible to installation angle and average flow velocity. The reliability of the model experiment would be enhanced by using Computational fluid dynamic （CFD）-aided design.

关 键 词：计量学 三峡电站 模型实验 多声道超声流量计 流速分布 

分 类 号：TB937[一般工业技术—计量学]