Method for stabilizing the flow of fluids at the time of expansi

Details Method for stabilizing the flow of fluids at the time of expansi Method for stabilizing the flow of fluids at the time of expansi

1985-02-25

1987-08-25

Rosenthal, Arnold

Valves and valve actuation

With material guide or restrictor

Movable or resilient guide or restrictor

138 44, 138 45, 251122, F16K 4704, F16K 134, F16K 2502

Patent

active

046887555

ABSTRACT:
At the time of expansion and accompanying kinetic degradation of a flowing stream of fluid, the flow is stabilized by forming at least two contiguous flow streams which consist of the same fluid but have a different velocity distribution and the two streams are then mixed. When applying the method to a valve provided with a so-called "hemispherical" closure member for compressible fluids, subsonic discharge nozzles are formed by cutting recesses in the valve seat downstream of the zone in which the valve closure member bears on the valve seat in the closed position. The subsonic discharge nozzles are disposed in alternate sequence with supersonic discharge nozzles formed by the opposite surfaces of the valve closure member and of the valve seat outside the recesses. When the method is applied to a multi-bore pressure reducer for compressible gases, a pressure-reducing plate is provided with low-discharge ducts in adjacent relation to high-discharge ducts.

REFERENCES:
patent: 2649273 (1953-08-01), Honegger
patent: 3730224 (1973-05-01), Prisk
patent: 3857542 (1974-12-01), Heymann
patent: 4506860 (1985-03-01), Schwerdtner et al.
Pluviose article in Revue Francaise de Mecanique, No. 78, 1981.

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