集中系モデルによる気液二相流中圧力波の解析

Translated title of the contribution: Analysis of pressure wave in gas-liquid two-phase flows by concentrated mass model

石川 諭, 近藤 孝広, 松崎 健一郎, 榎元 啓允

Research output: Contribution to journalArticlepeer-review

Abstract

A pressure wave generated by a compressor propagates in an air-conditioner piping system and causes a noise problem. The flow condition in the air-conditioner piping system becomes often a one-component two-phase flow, and attenuation of the pressure wave in the one-component two-phase flow is larger than the two-component two-phase flow because of the effect of the mass transfer. It is also important for the safety of nuclear reactors to understand the characteristic of pressure wave problems in the one-component two-phase flow. In this paper, we propose a concentrated mass model to analyze the pressure wave problems in the one-component two-phase flow. This model consists of masses, connecting springs, connecting dampers, and nonlinear base support dampers. The connecting spring and the connecting damper are derived from the compressibility of the gas phase and the effect of the mass transfer when the phase-change occurs. And the nonlinear base support damper is derived from the pipe friction. Additionally, an experiment on an air-conditioner piping system is performed, and the experimental results are compared with the numerical result in order to confirm the validity of the model. The numerical computational results agree very well with the experimental results. Especially, the attenuation of the pressure wave generated by the phase-change is numerically reproduced. Therefore, it is concluded that the proposed model is valid for the numerical analysis of the pressure wave problem in the two-phase flow.
Translated title of the contributionAnalysis of pressure wave in gas-liquid two-phase flows by concentrated mass model
Original languageJapanese
Pages (from-to)DR0166-DR0166
Journal日本機械学会論文集
Volume80
Issue number814
DOIs
Publication statusPublished - 2014

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