超声波流量计反射声道对比仿真研究  

Contrast Studies and Simulation on Reflected Sound Path for Ultrasonic Flow Meter

作　　者：谢程程[1] 朱云[1] 王丽辰[1] 

机构地区：[1]中国计量学院机电工程学院,浙江杭州310018

出　　处：《计算机仿真》2013年第1期310-313,322,共5页Computer Simulation

摘　　要：研究超声波束在管道内的反射对超声波流量计精度的影响。由于流体在管道内流速分布状况存在差异,使超声波流量计修正系数受流体的流动状态影响造成测量误差。为改善由于传统声道分布在通过管道中心轴线的位置而不能全面地反映整个横截面内流场分布的现状,提出将声道布置在弦上且反射声道均处于同一平面,利用计算流体动力学等进行数据采集及处理,对比得出反射声道的流速分布修正系数的稳定性高于单一分布声道,降低流动状态对测量精度的影响,达到了优化测量的目的。Research on accuracy of Ultrasonic Flow Meter influenced by the ultrasonic beam＇ s reflection in the pipe was conducted. Aiming at reducing the measurement error of the correction factor K caused by the flow condi- tion, the theory of setting sound paths in the chord and the same plane was put forward so as to improve the status quo of traditional sound path distributing at the center of axis instead of partially reflecting the flow field distribution of the cross section. By using computational fluid dynamics, the relationships between the correction factor K and Reynolds number can be obtained. The reflected sound paths＇ correction factor K varied most slightly versus Reynolds number than the traditional one and the optimization measurement was realized.

关 键 词：超声波流量计 计算流体动力学 流速分布修正系数 反射声道 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]