Cavitation model of choked flow of underheated water

Cavitation model of choked flow of underheated water

A necessary condition for cavitation to appear in fluid flow is a local drop of the pressure below the saturation pressure at the flow temperature. Such a pressure drop can be due to centrifugal acceleration or more accurately the centrifugal force engendered by this acceleration and directed along...

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Veröffentlicht in:Atomic energy (New York, N.Y.) N.Y.), 2012-05, Vol.112 (1), p.1-13
Hauptverfasser: Novoselsky, O. Yu, Kolganova, L. I.
Format: Artikel
Sprache:eng
Schlagworte:
Acceleration
Analysis
Cavitation
Centrifugal force
Computational fluid dynamics
Density
Flow rates
Fluid dynamics
Fluid flow
Gases
Hadrons
Heavy Ions
Hydraulics
Mathematical models
Nuclear Chemistry
Nuclear Energy
Nuclear Physics
Nuclear reactors
Physics
Physics and Astronomy
Studies
Valves
Velocity
Water
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Zusammenfassung:A necessary condition for cavitation to appear in fluid flow is a local drop of the pressure below the saturation pressure at the flow temperature. Such a pressure drop can be due to centrifugal acceleration or more accurately the centrifugal force engendered by this acceleration and directed along the radius of curvature of a convex surface bounding the flow, across the flow direction. A mathematical model of cavitation is constructed on this basis in the form of a dependence of the critical flow rate on the pressure, density, and underheating of water at the entrance into a hydraulic apparatus and concretized for nozzles and Venturi tubes with a smooth entry as well as for a stop valve in a RBMK process channel. This model is used to evaluate the state of the flow in the valve in different RBMK-1000 operating regimes.
ISSN:1063-4258
1573-8205
DOI:10.1007/s10512-012-9517-6