Airflow rate measuring apparatus of Karman vortex type

Details Airflow rate measuring apparatus of Karman vortex type Airflow rate measuring apparatus of Karman vortex type

1985-12-05

1987-09-29

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

G01F 132

Patent

active

046961933

ABSTRACT:
A columnar vortex generator is set in a duct communicating with an intake pipe of an engine, to extend across the airflow in the duct. A vortex sensor is arranged in a downstream surface of the vortex generator. The sensor generates a signal corresponding to the frequency of Karman vortexes generated at the downstream side of the vortex generator. A turbulence generator for generating a turbulent flow in that part of intake air flowing against the vortex generator is set at the upstream side of the vortex generator. The vortex generator consists of stationary and movable units. The movable unit is moved in accordance with elongation/contraction of a bellows so as to vary the typical dimension D of the surface of the vortex generator against which air flows.

REFERENCES:
patent: 3116639 (1964-01-01), Bird
patent: 3937195 (1976-02-01), Woods
patent: 3996796 (1976-12-01), Adler et al.
patent: 4116060 (1978-01-01), Frederick
patent: 4350047 (1982-09-01), Dewey, Jr. et al.
patent: 4397192 (1983-08-01), Mollet
patent: 4485679 (1984-12-01), Pitt

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