(Видавництво Львівської політехніки, 2017-12-23) Roman, Vitalii; Matiko, Fedir; Kovalchuk, Ivanna; Lviv Polytechnic National University
In this work the essence of hydrodynamic flow
measurement error of ultrasonic flowmeter (USM). The methods
of eliminating this error are analyzed. One of these methods is
considered in detail – optimization of the location schemes of
chordal acoustic paths (APs) of USM. The optimization is
performed on the basis of the analytical-empirical power law of
the distribution of the velocity of the undistorted flow. As a result
of the work, the authors calculated the optimal location of the APs
for chordal schemes of two- and three-path USMs. It was
established that optimization of the location schemes of APs
chordal USM allows to reduce the hydrodynamic flow
measurement error to a value of 0.05 %(for USMwith two hordal
APs) and 0.1 %(for USMwith three chordal APs). The developed
approach is convenient when designing multipath USM and their
research in laboratory conditions.
