Improved numerical integration method for flowrate of ultrasonic flowmeter based on Gauss quadrature for non-ideal flow fields

被引：22
作者：
Zheng, Dandan [1 ]
Zhao, Dan [1 ]
Mei, Jianqiang [2 ]
机构：
[1] Tianjin Univ, Sch Elect Engn & Automat, Tianjin Key Lab Proc Measurement & Control, Tianjin 300072, Peoples R China
[2] Civil Aviat Univ China, Aeronaut Automat Coll, Tianjin 300300, Peoples R China
来源：
FLOW MEASUREMENT AND INSTRUMENTATION | 2015年 / 41卷
基金：
中国国家自然科学基金;
关键词：
Multipath ultrasonic flowmeter; Numerical integration method for flowrate; Gauss-Jacobi method; Optimized Weighted Integration for Circular; Sections method; Non-ideal flow field;
D O I：
10.1016/j.flowmeasinst.2014.10.005
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Multipath ultrasonic flowmeters with large diameter are widely used in industry. And their measurement performances are sensitive to velocity profiles in conduits. Gauss-Jacobi and Optimized Weighted Integration for Circular Sections (OWICS) method are commonly applied in flow measurement of multipath ultrasonic flowmeters, both of which assume ideal flow in pipes. They are not proper for non-ideal flow measurement. Therefore, an improved numerical integration method for flowrate based on Gauss quadrature is proposed. With this method, optimum relative path heights and corresponding weights are determined according to specific disturbed flows. By comparison Gauss-Jacobi, OWICS with the improved method, the validity of the proposed method is verified for typical disturbed flows based on both theoretical analysis and experiments, and measurement performances of ultrasonic flowmeters are improved significantly. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：28 / 35
页数：8
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