Research and Application of On-Line Measurement of Liquid Point Velocity in Closed Circular Tube

Ming Gao, Zhancheng Bu, Hu Zhang

Abstract

In our work, there are many liquid flow meters used online that cannot be sent to the laboratory for traceability, but can only be traced online on site. Due to the unsatisfactory conditions of the liquid medium in the online closed circular pipe and the existence of serious corrosion on the inner wall of the pipeline, the internal structure of the pipeline cannot be detected during the online inspection, which makes it difficult to accurately measure the liquid flow rate in the pipeline online, resulting in inaccuracy of traceability. By studying the flow characteristics and velocity distribution of the liquid in the pipeline, a device that can detect the internal conditions of the pipeline and measure the liquid online is designed. The flow velocity curve is fitted by the algorithm of measuring point interpolation, and the flow velocity deviation is corrected by using a high-precision measurement standard device. Through the integration of the infinite flow unit, the flow rate in the online state is obtained. According to the measurement needs, the measurement points are added. After fitting and correction, the measurement accuracy of the flow velocity at the inner point of the closed tube is improved.

Keywords

Velocity of flow; Device; Application

Download

IMEKO-TC9-2019-014.pdf

DOI

10.21014/tc9-2022.014

IMEKO TC

TC9 - Flow Measurement

Back to the proceedings