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Hydraulic characteristics of a valve in two‐phase flow
Author(s) -
Tremblay P. E.,
Andrews D. G.
Publication year - 1974
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450520401
Subject(s) - pressure drop , mechanics , turbulence , boiling , control valves , safety valve , flow (mathematics) , two phase flow , materials science , thermodynamics , nuclear engineering , engineering , physics
In the case of boiling in nuclear reactor channels, it is apparent that the hydraulic characteristics of any valves used to control channel flowrates may have an important bearing on the critical channel power for the initiation of oscillations. The present investigation was therefore undertaken to determine the best model for two‐phase water‐steam pressure drop across such a valve. Pressures were between 300 and 1000 psig, mass fluxes between 0.1 and 0.5 × 10 6 lb m/hr‐ft 2 and qualities up to 64%. The measurements were made in the FLARE rig of Atomic Energy of Canada Ltd. by one author during the course of a doctoral study on boiling instabilities. Various pressure‐drop models were tried. It was found that for turbulent flow a homogeneous model was the best.