• CN：11-2187/TH
• ISSN：0577-6686

• 交叉与前沿 •

### 循环射流混合槽内压力脉动时间序列多尺度分析*

1. 1. 沈阳化工大学能源与动力工程学院 沈阳 110142；
2. 沈阳化工大学辽宁省高效化工混合技术重点实验室 沈阳 110142
• 出版日期:2016-09-20 发布日期:2016-09-20
• 作者简介:

作者简介：禹言芳，女，1979年出生，博士，副教授。主要研究方向为高效混合器内瞬态动力学。

E-mail：taroyy@163.com

E-mail：zhaoyao_89@163.com

孟辉波(通信作者)，男，1981年出生，博士，副教授。主要研究方向为高效混合器内瞬态动力学。

E-mail：mhb_vip@163.com

E-mail：syuct_hj@163.com

• 基金资助:
* 国家自然科学基金(21476142， 21106086， 21306115)、辽宁省高等学校优秀人才计划(LR2015051， LJQ2012035)、辽宁省博士科研启动基金(20131090)和辽宁省教育厅科研项目计划(L2013164)资助项目; 20151211收到初稿，20160314收到修改稿;

### Multi-scale Analysis of Pressure Fluctuation Time Series in the Circulating Jet Tank

YU Yanfang1, 2, ZHAO Yao1, 2, MENG Huibo1, 2, WU Jianhua1, 2

1. 1. School of Energy and Power Engineering， Shenyang University of Chemical Technology， Shenyang 110142;
2. Liaoning Key Laboratory of Chemical Technology for Efficient Mixing，
• Online:2016-09-20 Published:2016-09-20

Abstract:

：In order to investigate the complexity characteristics in the jet mixing zones of the circulating jet tank (CJT), a dynamic data acquisition system is employed to measure the instantaneous Pressure fluctuation signals (PFS) at different axial, radial and circumferential positions. The optimal data lengthi=110 000 is extracted based on the distributions of standard deviation (σ), the kurtosis (K), and the skewness (S) of the PFS. Based on the finite statistical complexity, the comparison among the synthetic method, dynamic method, and static method shows that the synthetic method behaves the highest adaptability. The most optimal wavelet decomposed scale is obtained. The complexity of PFS in the CJT is analyzed at different scales based on the finite statistical complexity and complexity. The results show that distribution trends of two kinds of complexity of PFS in the CJT are similar. Based on the multi-scale analysis of PFS, the values of complexity measure sharply decay then slightly decrease with the increasing decomposed scales, which indicate that the flow stability become stronger. The complexity measure of approximation PFS at scale J=10 with the frequency band of 0~0.98 Hz approaches to zero, which shows that the flow in the CJT appears periodic flow. There are multi scale flow structures which compose global stabilization and local instability in the CJT.