Method and apparatus for measuring gas flow speed

Details Method and apparatus for measuring gas flow speed Method and apparatus for measuring gas flow speed

1978-04-11

1979-10-16

Ciarlante, Anthony V.

Measuring and testing

Navigation

Leeway incidence or side-slip

73205R, G01W 100, G01F 134

Patent

active

041708997

ABSTRACT:
A method and apparatus for measuring the speed of a gas stream, particula suitable for use in detecting wind speed, utilizes the gas flow to create a negative pressure across a pressure sampling port oriented with its axis substantially perpendicular to the gas flow, the negative pressure being created by accelerating the gas flow stream lines over a surface of revolution containing the port. The negative pressure is compared with a reference pressure by means of a pressure transducer whereby the transducer output is representative of the speed of the gas. In a preferred form, the apparatus comprises a first pressure probe in the form of a sphere mounted on a tube projecting axially from a hollow cylindrical cup-like member with the sampling port formed in the base of the sphere and the cup-like member forming a second pressure probe with a pressure tapping internally of the cup providing the source of reference pressure.

REFERENCES:
patent: 2057767 (1936-10-01), Collins
patent: 3055216 (1962-09-01), Wappner
patent: 3105383 (1963-10-01), Cartwright et al.
patent: 3359795 (1967-12-01), Walsh
patent: 3805612 (1974-04-01), Shiba
patent: 3838598 (1974-10-01), Tompkins
patent: 3939708 (1976-02-01), Greer et al.

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