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气液两相流中的声速研究
引用本文:陶蓓,陈德华,车承轩,王秀明.气液两相流中的声速研究[J].应用声学,2015,34(4):373-376.
作者姓名:陶蓓  陈德华  车承轩  王秀明
作者单位:中国科学院声学研究所 北京,中国科学院声学研究所 北京,中国科学院声学研究所 北京,中国科学院声学研究所 北京
基金项目:(40774099,11134011,11274341)
摘    要:气液两相流在工业各领域中广泛存在,而声速是描述其声学性质的一个重要参数。本文从流体的体积弹性模量的定义出发,推导了气液两相流中的声速随含气率的变化关系式,即混合流体的Wood声速公式,将其声速的部分计算结果和其他作者的实验数据进行了比较,吻合良好。并通过COMSOL有限元模拟软件得到不同气体分布下圆管谐振腔最低阶模式的共振频率,间接数值模拟研究了含气率对声速的影响。模拟结果与理论计算结果一致,当气液两相流中含气率较低时,声速随含气率的增大急剧减小。本研究结果为确定声速与气液两相流中的含气率间的关系提供了参考依据。

关 键 词:气液两相流  含气率  声速  数值模拟
收稿时间:2014/9/11 0:00:00
修稿时间:2015/6/12 0:00:00

Study on the sound velocity in a gas-liquid flow
TAO Bei,CHEN Dehu,CHE Chengxuan and WANG Xiuming.Study on the sound velocity in a gas-liquid flow[J].Applied Acoustics,2015,34(4):373-376.
Authors:TAO Bei  CHEN Dehu  CHE Chengxuan and WANG Xiuming
Affiliation:Institute of Acoustics,Chinese Academy of Sciences,Institute of Acoustics,Chinese Academy of Sciences,Institute of Acoustics,Chinese Academy of Sciences,Institute of Acoustics,Chinese Academy of Sciences
Abstract:Gas-liquid flows exist in various industry fields. One of the important parameters to describe gas-liquid flows is sound velocity. The relationship of the sound velocity and the gas rate in a gas-liquid flow is derived from the definition of the fluid bulk modulus. The calculated results and the experimental results by Henry are in good agreement. And the pipe resonance frequency of the lowest order mode under the different gas distribution is received by COMSOL finite element simulation software. The effects of gas rate on the sound velocity are indirectly numerically studied. Simulation results are consistent with the theoretica Gas-liquid flows exist in various industry fields. One of the important parameters to describe gas-liquid flows is the sound velocity.l results. When gas exists in a gas-liquid flow even in a low gas rate, the sound velocity decreases sharply. This study offers a reference for the determination of the relationship of the sound velocity and the gas rate in a gas-liquid flow.
Keywords:Gas-liquid  flow  Gas  rate  Sound  velocity  Numerical  simulation
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