Gas flow area measurement

Details Gas flow area measurement Gas flow area measurement

1998-10-08

2000-11-21

Williams, Hezron

Measuring and testing

Volume or rate of flow

With indirect temperature or density compensation

73 375, 137 14, G01F 186, G01B 1308, F16L 5518

Patent

active

061486779

ABSTRACT:
The effective flow area of a restriction in a gas flow passage, such as that of a gas turbine nozzle or vane, is determined by use of a large reservoir containing pressurized gas which is discharged through the passage in a blowdown operation in which the ratio of back pressure of the restriction to gas pressure in the reservoir is maintained below critical for sonic flow; a timer may be used to measure the time for a predetermined fall of pressure in the reservoir whilst there is sonic flow through the restriction.

REFERENCES:
patent: 3875955 (1975-04-01), Gallatin et al.
patent: 4063449 (1977-12-01), Griggs
patent: 4799511 (1989-01-01), Azimov
patent: 5238030 (1993-08-01), Miller et al.
patent: 5259424 (1993-11-01), Miller et al.
patent: 5557050 (1996-09-01), Campain et al.
patent: 5653269 (1997-08-01), Miller et al.

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