Method for measuring flow vectors in gas flows

Details Method for measuring flow vectors in gas flows Method for measuring flow vectors in gas flows

1995-11-29

1998-05-12

Buczinski, Stephen C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

356 285, G01P 336

Patent

active

057514100

ABSTRACT:
In the optical measurement of the flow vectors in gas flows, two substantially parallel light beams (11a, 11b) are focussed at separate focussing spots. The particles passing the focussing spots light up and thereby generate a start pulse and a stop pulse, respectively. Therewith, the component of the flow vector extending in the normal plane to the optical axis (OA) is detected by transit time measurement. The flow component pointing in the direction of the optical axis (OA) is detected independent thereof according to the Doppler principle by supplying the scattered light generated by the particles to an optical frequency/amplitude converter (22).

REFERENCES:
patent: 3941477 (1976-03-01), Schodl
patent: 4840486 (1989-06-01), Schodl
patent: 4851697 (1989-07-01), Schodl
patent: 4919536 (1990-04-01), Komine

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