Velocity averaging pitot

Measuring and testing – Volume or rate of flow – Using differential pressure

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G01F 134

Patent

active

057538255

ABSTRACT:
A fluid pressure sensing apparatus has at least one pressure sensing element that is adapted to extend transverse to the direction of flow of a fluid flow stream. The probe is divided into an upstream chamber and a downstream chamber. A plurality of static pressure measuring holes define openings and are constructed and arranged within the probe so as to extend transversely to the fluid flow direction and further, the static pressure measuring holes are in fluid communication with the downstream chamber. A plurality of total pressure measuring holes define openings and are constructed and arranged within the probe so as to extend through the upstream wall in the direction of fluid flow and further, the total pressure measuring holes are in fluid communication with the upstream chamber, the total pressure measuring holes being located in front of the static pressure measuring holes when considered in the direction of fluid flow. In addition, the static pressure and the total pressure measuring holes have differing geometries that operate to enhance measurement accuracy.

REFERENCES:
patent: 3765241 (1973-10-01), Lambert
patent: 4559835 (1985-12-01), DeBaun
patent: 4735100 (1988-04-01), Hajto
patent: 4768386 (1988-09-01), Taddeo
patent: 4912973 (1990-04-01), Milewski et al.
patent: 5429003 (1995-07-01), McFarland
patent: 5481925 (1996-01-01), Woodbury

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