Débitmètre semi modulaire. Théorie et pratique

Abstract

A particular study of a semi modular rectangular flowmeter, characterized by both a broad crested sill and lateral contraction, is presented. This is firstly theoretically examined and secondly experimentally tested under various geometrical dimensions. The theoretical development aims, on one hand, to identify the main characteristics of the flow and the geometrical parameters of the flowmeter which influence the discharge. On the second hand, discharge coefficient is expressed with the help of the momentum equation applied between two sections judiciously chosen. Under various geometrical dimensions, the considered flow meter is intensively tested in order to corroborate or to correct the proposed theoretical relationships.