Flow metering device with low energy loss

Details Flow metering device with low energy loss Flow metering device with low energy loss

1983-10-20

1985-05-14

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Using differential pressure

G01F 144

Patent

active

045164347

ABSTRACT:
A venturi-type fluid flow metering device is operative with minimum fluid energy losses and is adapted for construction in reduced lengths. The device comprises inlet, converging, throat and downstream diverging sections, and pressure sensing taps are provided which communicate with the inlet and throat sections for sensing static fluid pressures therein. The converging section comprises an inlet cone portion which extends angularly inwardly in a downstream direction relative to the inlet section and a throat cone portion which extends angularly inwardly in a downstream direction from the inlet cone portion to the throat section, the throat cone portion being at a reduced angle with respect to the inlet section compared to the inlet cone portion. The intersections between the inlet cone portion and the throat cone portion and between the throat cone portion and the throat section are of rounded configurations to prevent the formation of vena contractas in the device so that energy losses are minimized.

REFERENCES:
patent: 3686946 (1972-08-01), Halmi
patent: 3733901 (1973-05-01), Halmi
patent: 4174734 (1979-11-01), Bradham

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