Author(s): Zhigang Wang; Heming Hu; Shun Hu; Panhong Ren; Shuan Xu

Linked Author(s):

Keywords: Open channel flow; Transducer arrangement; Ultrasonic transit-time method

Abstract: Ultrasonic transit-time method is very popular in the open channel flow determination. In general, transducers are evenly arranged, which might not well describe the velocity distribution by limited transducers. Thus, a series of physical model tests were conducted and the results showed that the transducers should be increased near the bed to improve the flow measurement accuracy. By contrast, the transducers where h /H lies i between 0.1~0.7 can be reduced appropriately without losing flow measurement accuracy obviously. The relative results were used in the design of the open channel flow meter, and the tested results showed that the indication errors of the flow measurements are smaller than ±1.16%, and the corresponding expanded uncertainty are smaller than 0.79% (k = 2). The research results and its application experiences can provide technical supports and references for similar open channel flow rate determination.

DOI: https://doi.org/10.64697/iahr.proc.hic2026.73

Year: 2026