Apparatus for measuring the concentration of cavitation nuclei i

Details Apparatus for measuring the concentration of cavitation nuclei i Apparatus for measuring the concentration of cavitation nuclei i

1985-12-10

1987-02-24

Tokar, Michael J.

Measuring and testing

Instrument mechanism or transmission

Rate of change

73148, G01M 1000

Patent

active

046448080

ABSTRACT:
In hydrodynamic testing, in particular in laboratory testing of propellers, it is necessary to measure the concentration of cavitation nulcei in a liquid. The measurement is performed by counting bubbles of vapor formed by the cavitation nuclei in a zone (C) having minimum cross-section and pressure (Pt) in a forced flow along a duct. A deflector core (18) is disposed on the axis of a diverging downstream portion (C) of said duct in order to avoid the liquid streamlines from becoming detached and to facilitate bubble counting.

REFERENCES:
patent: 4058004 (1977-11-01), Hammitt et al.
patent: 4084432 (1978-04-01), Lecoffre
Journal of Physics E. Scientific Instruments, vol. 15, No. 7, Jul. 1982, pp. 741-745, The Institute of Physics, London, GB M. K. De et al, "Instrument System for Monitoring Cavitation Noise".
ISA Transactions, vol. 22, No. 3, 1983, pp. 71-80, ISA, Research Triangle Park, U.S.: M. L. Riveland, "The Industrial Detection and Evaluation of Control Valve Cavitation".

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