http://swrc.ontoware.org/ontology#Article
気液二相脈動流の流動様式とボイド率変動特性
ja
Flow Pattern
Void Fraction Fluctuation
Oscillatory Two-Phase Flow
Simulation
Void Wave Propagation Velocity
平山 美緒
梅川 尚嗣
岡野 充浩
小澤 守
Safety of large capacity boiling channel system was highly advanced in this three decades. Recent advanced compact watertube boilers, on the other hand, brought about high possibility of unstable flow condition owing to the operation at low-mass flux and low-pressure. Many existing researches on the safely issues focused mainly on the stable flow, and therefore relevant information on the effect of the flow oscillation on the safety issues, e.g. critical heat fluxes, was insufficient for the sound design of compact watertube boilers. Aiming at the fundamental understanding of the possible two-phase flow dynamics, this paper focuses the discussion on the experimental and analytical investigations about the effect of oscillatory flow on the flow pattern and void fraction behavior. Then, the results are summarized as follows: (1) The flow pattern transition is different under oscillatory flow condition from that of the safety condition, and a large bubble and thus slug flow is temporarily formed in the gas injection area during the flow reversal state. (2) Void fraction fluctuation and void propagation velocity can be well predicted by the numerical simulation based on the one-dimensional drift-flux model.
混相流
17
3
285-295
2003-09-15
09142843
日本混相流学会