Phase-Locked Particle Image Velocimetry Visualization of the Sound Field at the Outlet of a Circular Tube
Phase-Locked Particle Image Velocimetry Visualization of the Sound Field at the Outlet of a Circular Tube
复制标题
圆管出口声场的锁相粒子图像测速可视化
DOI：
10.12693/aphyspola.125.a-108
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发表时间：
2014
影响因子：
0.7
通讯作者：
W. Mickiewicz
中科院分区：
文献类型：
--
作者：
S. Weyna;W. Mickiewicz
用粒子图像测速(PIV)技术研究了圆柱形管道出口区域的脱落过程和声速形成过程。对波导出口声场行为的研究工作解决了对工业应用具有重要意义的问题。所得结果可用于许多涉及管道、管道和管材的工业应用。在我们的研究中，声场测量采用锁相式PIV系统，具有高采样率和大存储块，使用Davis v.8.11软件。采用互相关法和FFT分析相结合的方法作为矢量处理算法。用一系列PIV矢量图计算了700 Hz和1400 Hz频率下圆管开口端的声速分布。假设一个频率周期有六个相阶，从速度数据阶跃中提取特征信号，并以图形方式显示。
The shedding process and acoustic ow formation in the region of outlet of a cylinder duct has been investigated by means of the particle image velocimetry (PIV) technique. The research work on the behavior of the sound eld at outlets of waveguides addresses issues of importance to industrial applications. The obtained results can be used in a number of industrial applications involving pipes, ducts and tubing. In our investigation the acoustics ow elds are measured with a phase-locked PIV system with high sampling rate and large internal memory block using DAVIS v. 8.11 software. A cross-correlation method, in conjunction with the FFT analysis, is used as a vector processing algorithm. A series of PIV vector maps was used to evaluate the acoustic velocity eld at the open end of circular tube throughout the acoustic cycle for frequencies of 700 Hz and 1400 Hz. Six phase steps were assumed for one frequency cycle and the characteristic signal was extracted from the velocity data step and shown graphically.