Measuring and testing – Volume or rate of flow – System
Patent
1974-01-28
1977-05-31
Myracle, Jerry W.
Measuring and testing
Volume or rate of flow
System
G01W 100
Patent
active
040261492
ABSTRACT:
A fluid stream velocity measuring apparatus and its method of use wherein a fluid jet is directed from a nozzle along a portion of the flow path of a fluid stream whose velocity is to be measured, towards the open end of one or more receiver tubes. The nozzle and receiver tube or tubes are mounted by mounting means to have a jet forming space, extending between them a distance of at least five times the minimum distance across the nozzle orifice, with the fluid stream having a substantially unobstructed flow path along a surface of the mounting means extending past the nozzle and receiver tube or tubes. The fluid pressure in the receiver tube or tubes is measured to determine the velocity of the fluid stream into which the jet is directed. The internal geometry of the fluid jet nozzle is derived from the jet Reynolds number which is in excess of 1700 and the external geometry of the nozzle and/or receiver is defined to provide a substantially unobstructed flow path past the nozzle and receiver and substantially unrestrained interaction of the fluid stream with the jet.
REFERENCES:
patent: 3686937 (1972-08-01), Corey
patent: 3705534 (1972-12-01), Turek
Canadian Patents and Development Limited
Lemon Francis W.
Myracle Jerry W.
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