Method and apparatus for measuring the flow speed and the gas vo

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

1977-07-18

1979-03-27

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

System

73 19, 73194E, G01F 158

Patent

active

041459245

ABSTRACT:
Method and apparatus for measuring the flow speed and the gas volume proportion of a stream of liquid metal wherein a magnetic probe is inserted into the stream of liquid metal and induces a first and second voltage according to Faraday's principle of induction in a first and second predetermined volume of the liquid metal stream, the time sequence of the first and second induction voltages due to speed fluctuations is detected as a measure for the flow speed by means of a first and second pair of electrodes at a known axial spacing L, the travel time .tau. of a predetermined volume of liquid metal from the first pair of electrodes to the second pair of electrodes is measured and the flow speed v = L/.tau. determined therefrom, and that the induction voltage, which decreases in magnitude with increasing gas volume proportion, is used as a measure for the gas volume proportion in the stream of liquid metal.

REFERENCES:
patent: 2782369 (1957-02-01), Werner et al.
patent: 3830095 (1974-08-01), Jaross
patent: 3967500 (1976-07-01), Forster

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