Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1984-10-17
1985-12-24
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Using differential pressure
G01F 146
Patent
active
045598363
ABSTRACT:
This invention relates to an improved pitot tube type flow measuring instrument for use in pipes and other conduits characterized by a generally diamond-shaped sensor portion constituting a bluff body for splitting the flow that includes at least a large-radiused leading edge in which three or more impact ports are located, a pair of planar portions diverging rearwardly from the leading edge to a transversely-spaced pair of much shorter-radiused side edges that cooperate therewith and the downstream-facing portion of the bluff body to define flow separation zones capable of stabilizing the flow coefficient over a broad range of flow conditions provided that the distance separating them is at least five times either of their radii. The invention further includes the unique method of mounting the probe in two-phase or multi-phase flowing systems where one of the fluids is a liquid and another a gas that calls for tilting the axis of the sensing portion thereof at an angle to the horizontal such that pools of the liquid are trapped in one end or the other depending upon whether the gaseous constituent is hot or cold.
REFERENCES:
patent: 1119581 (1914-12-01), Dodge
patent: 1145234 (1915-07-01), Dodge
patent: 1250238 (1917-12-01), Spitzglass
patent: 4154100 (1979-05-01), Harbaugh et al.
Bond Morris M.
Coleman Darrel F.
Dieterich Standard Corp.
Goldstein Herbert
Spangler, Jr. Edwin L.
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