Wedge Flowmeter

Abstract

This paper describes experimental results of a wedge flowmeter. This flowmeter may be used to measure the flow rate in a pipeline by reading the differential pressure between the front and the rear edges of a wedge-shaped constrictor in the meter as in usual constriction meters. Two shapes of constriction wedge were employed ; one is an equilateral triangle and the other a right-angled isosceles triangle, and their heights are approximately 0.5, 0.4 and 0.3 times the inner diameter of the flowmeter, respectively. It is found that the wedge flowmeter is of an accuracy sufficient for practical use. As the Reynolds number in the pipe is increased, the discharge coefficient of the flowmeter approaches more rapidly to a constast value than that of a pipe orifice which has a same rate of throttled area.