Some guidelines for ultrasonic flowmeter sensors installation for distorted velocity profiles

• Autorzy: Goujon-Durand, S.
• Języki publikacji: EN

Abstrakty

EN

In the paper experimental data of distorted velocity distńbutions taken by authors and from literature are presented. Mathematical model of distorted velocity profile and velocity distribution is given and mathematical models of flowmeter primary device for fourextan are drown (point velocity measurement, shift method, time-of-flight one path method multipath method). Three measures of the distortion of the velocity distribution shape presented: first for velocity profile, and two for the whole cross-section. Guidelines primary device of ultrasonic flowmeter installation are given. The distance downstream, single elbow in which the velocity distribution is axisymmetrical and flat is to short for, developed velocity distribution and installing the flowmeter is such place gives system error. The velocity meter should be mounted in the place, where velocity is eąual to average velocity in the whole cross-section, but for disturbed velocity distributions it is very difficult to find such place. Multipath primary devices gives smaller errors, and also using straighteners gives decreasing measurement error.

• Czasopismo: Molecular and Quantum Acoustics
• Rocznik: 1998
• Tom: Vol. 19
• Strony: 91-102
• Opis fizyczny: Bibliogr. 16 poz., rys.

Twórcy

autor

Goujon-Durand, S.

• l'Universite Paris XII Val-de-Marne, 61, Avenue du General de Gaulle a Creteil, Paris, France