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传热学
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传热学

DOI: 10.1615/HeatTransRes.v33.i3-4.160
5 pages

Pressure Waves in Vapor-Liquid Media of Different Internal Structures

V. G. Pokusaev
Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
Sergey I. Lezhnin
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Ak. Lavrenteva 1, Novosibirsk 630090, Russia; Novosibirsk State University, 1 Pirogova Street, Novosibirsk 630090, Russia
Nikolay A. Pribaturin
Kutateladze Institute of Thermophysics, Acad. Lavrentiev ave., 1, Novosibirsk, Russia; Nuclear Safety Institute, Novosibirsk Branch, Acad. Lavrentiev ave., 1, Novosibirsk, Russia

ABSTRACT

It is shown that a two-phase flow of any structure can be considered as a superposition of canonical ones: bubble, stratified, and slug. An analysis of the evolution of a moderate-amplitude wave allowed one to reduce the set of equations to the single wave equation. The model suggested describes qualitatively the "combs" of pressure pulses arising in the experiment. For the stratified-bubble structure the "stratified" dispersion predominates over the "bubble" one. An investigation of wave dynamics in heated channels with void fraction gradients showed the difference in the character of wave evolution for bubble and stratified structures.


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