Critical flow detection

Details Critical flow detection Critical flow detection

1986-11-26

1988-06-28

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Mass flow by imparting angular or transverse momentum to the...

7386161, 738659, 374 54, G01F 142

Patent

active

047531142

ABSTRACT:
The invention provides a method and apparatus for determining when critical flow conditions are reached in a nozzle. The apparatus comprises a flow nozzle having a throat therein, a means for measuring temperature in the throat, a means for measuring temperature downstream of the throat, and a means for determining differential temperature between the throat and the downstream location. The method comprises measuring a temperature in the throat of the critical flow nozzle, measuring the temperature downstream of the nozzle, and adjusting an upstream pressure to maximize the difference between the throat and the downstream location.

REFERENCES:
patent: 3433069 (1969-03-01), Trageser
patent: 3817100 (1974-06-01), Anderson et al.
patent: 3896670 (1975-07-01), Converse et al.
patent: 4317365 (1982-03-01), Lauterbach

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