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Critical Heat Flux Condition Induced by Flow Instabilities in Boiling Channels
Author(s) -
Ozawa M.,
Hirayama M.,
Umekawa H.
Publication year - 2002
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/1521-4125(20021210)25:12<1197::aid-ceat1197>3.0.co;2-r
Subject(s) - mechanics , boiling , thermal hydraulics , flow (mathematics) , instability , steady state (chemistry) , transient (computer programming) , critical heat flux , thermodynamics , amplitude , hydraulics , heat flux , two phase flow , heat transfer , physics , chemistry , computer science , quantum mechanics , operating system
In the design of boiling two‐phase flow systems, such as boilers, the theoretical and/or empirical formulas related to thermal hydraulics are described in terms of the steady‐state characteristics. Such systems may be encountered in the unanticipated dynamic behavior, e.g., flow instability problems, during the startup, partial load and/or transient operations even in the suitably designed system for full‐load and steady operations. Flow instabilities mean large‐amplitude fluctuations of flow in two‐phase systems, which cause significant pressure fluctuations and departure from steady and safe operation.