小型反馈射流振动器的动态特性研究

吴凛; 李艳荣; 稲垣照美; 湛从昌; 陈奎生

doi:10.13433/j.cnki.1003-8728.2016.1215

小型反馈射流振动器的动态特性研究

doi: 10.13433/j.cnki.1003-8728.2016.1215

1.
武汉科技大学机械自动化学院, 武汉 430081;
2.
茨城大学工学部机械工学科, 茨城 316-8511 日本

基金项目:

国家自然科学基金项目（51475338）与湖北省自然科学基金项目（ZRZ2014000117）资助

详细信息

作者简介:
吴凛(1990-),博士研究生,研究方向为微尺寸流体机械射流特性,695963614@qq.com

通讯作者:
陈奎生(联系人),教授,硕士,kschen@wust.edu.cn

计量
- 文章访问数: 125
- HTML全文浏览量: 19
- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2014-11-17
- 刊出日期: 2017-01-05

Research on Dynamic Characteristics of a Small-scale Feedback Fluidic Oscillator

1.
School of Machinery and Automation, Wuhan University of Science and Technology, Wuhan 430081, China;
2.
College of Engineering, Ibaraki University, Ibaraki 316-8511, Japan

摘要

摘要: 针对小型反馈射流振动器在低雷诺数下的流场的动态特性，利用粒子图形测速法（PIV）对其进行了二维测量实验，得到了不同流量下内部流场在振动稳定状态时的速度分布，流量范围为100~300 ml/min。通过实验监测上下反馈通道出口处的Y方向分速度并分析射流的振动过程和原理。数据分析方法包括快速傅里叶变换和小波变换，得到不同流量时的振动频率，进而得出振动频率特性和斯特罗哈数特性。结果表明：该小型反馈射流振动器内部流场呈周期振动，快速傅里叶变换和小波变换得到的振动频率接近，频率特性和斯特罗哈数特性均为非线性。
- 粒子图像测速法(PIV) /
- 小型反馈射流振动器 /
- 快速傅里叶变换 /
- 小波变换
Abstract: Particle image velocimetry(PIV) was conducted in order to get the dynamic characteristics of the two dimensional fluid fields in a small-scale feedback fluidic oscillator operated under low Reynolds number flow. Velocity distributions of the whole internal fluid flow under steady state were gained when the flow rate ranged from 100 to 300 ml/min. The jet flow was analyzed by monitoring the Y components of velocities in the outlets of two feedback channels in the experiments. Oscillation frequencies under different flow rate were obtained by two data analysis methods, fast Fourier transforms and wavelet transforms. Characteristics of oscillation frequency and Strouhal number were also obtained. The results verified that the internal fluid flow of the small-scale feedback fluidic oscillator presented periodic oscillation, the oscillation frequencies obtained by fast Fourier transforms and wavelet transforms were nearly approximate, the characteristics of oscillation frequency and Strouhal number were nonlinear.
- experiments /
- flow fields /
- feedback /
- velocity distribution

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