Experimental results of the effect of gas composition on void fraction and bubble behavior for gas-liquid two-phase flow under stagnant water condition

Experimental results of the effect of gas composition on void fraction and bubble behavior for gas-liquid two-phase flow under stagnant water condition

Fission product removal by pool scrubbing is known to be largely affected by the gas-liquid two-phase flow regime. The pool scrubbing performance of various carrier gases was evaluated in two-phase flow experiments by injecting helium, nitrogen, or argon through a pool of stagnant water in a column...

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Autores principales: Miki SAITO, Taizo KANAI, Satoshi NISHIMURA, Yoshihisa NISHI
Formato: article
Lenguaje:EN
Publicado: The Japan Society of Mechanical Engineers 2021
Materias:
pool scrubbing
gas-liquid two-phase flow
void fraction
wire-mesh sensor
bubble
Mechanical engineering and machinery
TJ1-1570
Acceso en línea:https://doaj.org/article/acff4278d9764478ae6097239aea3620
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spelling oai:doaj.org-article:acff4278d9764478ae6097239aea36202021-11-29T06:09:58ZExperimental results of the effect of gas composition on void fraction and bubble behavior for gas-liquid two-phase flow under stagnant water condition2187-974510.1299/mej.20-00546https://doaj.org/article/acff4278d9764478ae6097239aea36202021-03-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/8/4/8_20-00546/_pdf/-char/enhttps://doaj.org/toc/2187-9745Fission product removal by pool scrubbing is known to be largely affected by the gas-liquid two-phase flow regime. The pool scrubbing performance of various carrier gases was evaluated in two-phase flow experiments by injecting helium, nitrogen, or argon through a pool of stagnant water in a column with an inner diameter of 0.5 m and a height of 8 m. The gases were supplied through a cylindrical nozzle with an inner diameter 69 mm at superficial gas velocities ranging from 0.013 to 0.053 m s-1. Measurements were conducted using a camera and two sets of a 128 × 128 wire-mesh sensors, separated by 40 mm. The visually observed gas hold-up and wire-mesh sensor-measured average void fraction decreased with increasing fraction of lighter gas in the supplied gas. Detailed analysis of the flow regime using the obtained wire-mesh sensor signals revealed that lighter gases led to a greater fraction of relatively large bubbles in the flow compared to heavier gases, causing the gas phase with the lighter gases to have a higher average rise velocity in the flow. This leads to a hypothesis that, compared to heavier gases, lighter gases break up less or coalesce more in the flow, resulting in distinct two-phase flow characteristics depending on the inlet gas composition.Miki SAITOTaizo KANAISatoshi NISHIMURAYoshihisa NISHIThe Japan Society of Mechanical Engineersarticlepool scrubbinggas-liquid two-phase flowvoid fractionwire-mesh sensorbubbleMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 8, Iss 4, Pp 20-00546-20-00546 (2021)
institution DOAJ
collection DOAJ
language EN
topic pool scrubbing
gas-liquid two-phase flow
void fraction
wire-mesh sensor
bubble
Mechanical engineering and machinery
TJ1-1570
spellingShingle pool scrubbing
gas-liquid two-phase flow
void fraction
wire-mesh sensor
bubble
Mechanical engineering and machinery
TJ1-1570
Miki SAITO
Taizo KANAI
Satoshi NISHIMURA
Yoshihisa NISHI
Experimental results of the effect of gas composition on void fraction and bubble behavior for gas-liquid two-phase flow under stagnant water condition
description Fission product removal by pool scrubbing is known to be largely affected by the gas-liquid two-phase flow regime. The pool scrubbing performance of various carrier gases was evaluated in two-phase flow experiments by injecting helium, nitrogen, or argon through a pool of stagnant water in a column with an inner diameter of 0.5 m and a height of 8 m. The gases were supplied through a cylindrical nozzle with an inner diameter 69 mm at superficial gas velocities ranging from 0.013 to 0.053 m s-1. Measurements were conducted using a camera and two sets of a 128 × 128 wire-mesh sensors, separated by 40 mm. The visually observed gas hold-up and wire-mesh sensor-measured average void fraction decreased with increasing fraction of lighter gas in the supplied gas. Detailed analysis of the flow regime using the obtained wire-mesh sensor signals revealed that lighter gases led to a greater fraction of relatively large bubbles in the flow compared to heavier gases, causing the gas phase with the lighter gases to have a higher average rise velocity in the flow. This leads to a hypothesis that, compared to heavier gases, lighter gases break up less or coalesce more in the flow, resulting in distinct two-phase flow characteristics depending on the inlet gas composition.
format article
author Miki SAITO
Taizo KANAI
Satoshi NISHIMURA
Yoshihisa NISHI
author_facet Miki SAITO
Taizo KANAI
Satoshi NISHIMURA
Yoshihisa NISHI
author_sort Miki SAITO
title Experimental results of the effect of gas composition on void fraction and bubble behavior for gas-liquid two-phase flow under stagnant water condition
title_short Experimental results of the effect of gas composition on void fraction and bubble behavior for gas-liquid two-phase flow under stagnant water condition
title_full Experimental results of the effect of gas composition on void fraction and bubble behavior for gas-liquid two-phase flow under stagnant water condition
title_fullStr Experimental results of the effect of gas composition on void fraction and bubble behavior for gas-liquid two-phase flow under stagnant water condition
title_full_unstemmed Experimental results of the effect of gas composition on void fraction and bubble behavior for gas-liquid two-phase flow under stagnant water condition
title_sort experimental results of the effect of gas composition on void fraction and bubble behavior for gas-liquid two-phase flow under stagnant water condition
publisher The Japan Society of Mechanical Engineers
publishDate 2021
url https://doaj.org/article/acff4278d9764478ae6097239aea3620
work_keys_str_mv AT mikisaito experimentalresultsoftheeffectofgascompositiononvoidfractionandbubblebehaviorforgasliquidtwophaseflowunderstagnantwatercondition
AT taizokanai experimentalresultsoftheeffectofgascompositiononvoidfractionandbubblebehaviorforgasliquidtwophaseflowunderstagnantwatercondition
AT satoshinishimura experimentalresultsoftheeffectofgascompositiononvoidfractionandbubblebehaviorforgasliquidtwophaseflowunderstagnantwatercondition
AT yoshihisanishi experimentalresultsoftheeffectofgascompositiononvoidfractionandbubblebehaviorforgasliquidtwophaseflowunderstagnantwatercondition
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