Based on the existing pump performance testing device

the install location of ultrasonic flowmeter was carried out using Fluent modeling and the effects of 90° elbow

valve

pipe diameter

and flow rate on fluid flow field was deeply studied.The results showed that for fully developed turbulent flow

the flow rate of the fluid near a distance of 90° elbow was greatly nonuniform and the phenomenon of a low velocity appeared in the inside of the elbow.At a relatively small diameter and a large velocity or Reynolds number

the installation position of the ultrasonic flowmeter could be ahead of the position compared with 10 D.When the flow condition was laminar

the flow rate at the contact with the pipe wall was obviously lower than that of the middle of pipe wall.However

with the flow rate increasing

the fluid was gradually transformed into fully developed turbulence flow

and the flow rate in the pipe became uniform.