Mechanisms of bubble effects on acoustic propagation characteristics in high-temperature and high-pressure bubble flows

IF 3.3 3区 工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY
Yu Jiang , Genshan Jiang , Jianhao Sun , Yu Zhou , Hao Li
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引用次数: 0

Abstract

In the complex gas-liquid two-phase flow environment of the nucleate boiling region outside the heat-exchange pipes of steam generators, acoustic propagation is influenced by multiple factors. Previous research has largely considered how the bubble distribution and acoustic frequency affect the acoustic velocity and attenuation, whereas the role of boundary-layer thickness in acoustic propagation has not been explored systematically. Using bubble damping theory and the linear model of acoustic propagation in water containing monodisperse bubbles, derived here is the relationship among acoustic velocity, acoustic attenuation, and boundary-layer thickness in bubble flow. Also established is a numerical model for acoustic propagation in bubble flow under high temperature and pressure, and how the bubble distribution and acoustic frequency affect the sound field is analyzed. This study reveals the factors influencing bubble damping and how it regulates acoustic attenuation, providing insight into how acoustic waves propagate in gas-liquid two-phase flows.
高温高压气泡流中气泡对声波传播特性的影响机制
在蒸汽发生器换热管外核沸腾区复杂的气液两相流环境中,声传播受到多种因素的影响。以往的研究主要考虑了气泡分布和声波频率对声速和衰减的影响,而边界层厚度在声波传播中的作用尚未得到系统的探讨。利用气泡阻尼理论和单分散气泡水中声传播的线性模型,导出了气泡流动中声速、声衰减和边界层厚度之间的关系。建立了高温高压条件下气泡流声传播的数值模型,分析了气泡分布和声波频率对声场的影响。该研究揭示了气泡阻尼的影响因素及其对声衰减的调节作用,为声波在气液两相流中的传播提供了新的思路。
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来源期刊
Progress in Nuclear Energy
Progress in Nuclear Energy 工程技术-核科学技术
CiteScore
5.30
自引率
14.80%
发文量
331
审稿时长
3.5 months
期刊介绍: Progress in Nuclear Energy is an international review journal covering all aspects of nuclear science and engineering. In keeping with the maturity of nuclear power, articles on safety, siting and environmental problems are encouraged, as are those associated with economics and fuel management. However, basic physics and engineering will remain an important aspect of the editorial policy. Articles published are either of a review nature or present new material in more depth. They are aimed at researchers and technically-oriented managers working in the nuclear energy field. Please note the following: 1) PNE seeks high quality research papers which are medium to long in length. Short research papers should be submitted to the journal Annals in Nuclear Energy. 2) PNE reserves the right to reject papers which are based solely on routine application of computer codes used to produce reactor designs or explain existing reactor phenomena. Such papers, although worthy, are best left as laboratory reports whereas Progress in Nuclear Energy seeks papers of originality, which are archival in nature, in the fields of mathematical and experimental nuclear technology, including fission, fusion (blanket physics, radiation damage), safety, materials aspects, economics, etc. 3) Review papers, which may occasionally be invited, are particularly sought by the journal in these fields.
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