INFLUENCE OF GAS PROPERTIES ON GAS-LIQUID TWO-PHASE FLOW

被引：0

作者：

Saito, Miki ^{[1
]}

Kanai, Taizo ^{[1
]}

Nishimura, Satoshi ^{[1
]}

Nishi, Yoshihisa ^{[1
]}

机构：

[1] Cent Res Inst Elect Power Ind, Yokohama, Kanagawa, Japan

来源：

PROCEEDINGS OF THE 2020 INTERNATIONAL CONFERENCE ON NUCLEAR ENGINEERING (ICONE2020), VOL 3 | 2020年

关键词：

Pool Scrubbing; Two-Phase Flow; Gas Hold-Up; Void Fraction; Wire-Mesh Sensor; HOLD-UP; BUBBLE;

D O I：

暂无

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Understanding the mechanism of fission product (FP) removal by pool scrubbing is essential for improving the prediction accuracy of FP emissions concerning severe accident (SA) in a nuclear power plant. Since FP migrates from a gas-phase to a liquid-phase via a gas-liquid interface, the FP removal efficiency by pool scrubbing is largely affected by the flow regime of gas-liquid two-phase flow. In order to gain a deeper understanding of the influence of gas properties on flow regimes, experiments were performed by injecting helium (He) and nitrogen (N-2) gas mixtures of several volumetric ratios through a pool of stagnant water. The result suggests clear effects of gas compositions on gas-liquid two-phase flow, where both void and holdup fractions were found to increase with N-2 fraction in the supplied gas. The results were compared with previous studies, and a detailed analysis of bubble characteristics for different compositions of gases was performed using a wire-mesh sensor (WMS). This paper also illustrates further research aspects needed to discuss the effect of its results on FP removal efficiency in a SA, and to acquire comprehensive physics behind such gas property influences on two-phase flow.

引用

页数：8

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