Abstract: Annular flow is one of the most important flow regimes that commonly found in many industrial applications, especially petroleum and chemical industry, air conditioning and refrigeration system and nuclear reactor cooling etc. The time-series signals which are directly related to the thickness of the liquid film are studied by using the wavelet transform processing method and several typical recursive parameters from a multi-scale perspective.The reconstruction coefficients and power spectra of time-series signals - DOI:10.3969/j.issn.1000-1565.2019.06.004垂直上升气液环状流液膜参数多尺度分析赵宁¹,张琳^1,2,牛立娜³,刘雨航¹,赵治月^1,4(1.河北大学 质量技术监督学院,河北 保定 071002;2.天津大学 电气自动化与信息工程学院,天津 300072;3.河北省计量监督检测研究院 热工与能源计量研究所,河北 石家庄 050051;4.沧州师范学院 机械与电气工程学院, 河北 沧州 061001)摘 要:气液两相环状流是最常见、最典型的流型之一,广泛存在于工业应用领域,特别是在石油化工、空气调节冷却系统、核反应堆冷却等领域.利用近红外光吸收衰减技术对气液两相垂直上升环状流的重要流动参数——液膜厚度进行了测量,将与液膜厚度直接相关的光强时序信号利用小波变换的多尺度处理方法进行研究分析,获得其重构系数和功率谱;通过对采集到的时序信号的确定性和平均对角线长度2个递归参量进行了分析,得到了液膜表面扰动波的变化和入口参数之间的关系,为更好地认识液膜波动、演化提供了有效的技术手段.关键词:关键词:扰动波;液膜;小波分析;多尺度;递归分析中图分类号:O359;TK313 文献标志码:A 文章编号:1000-1565(2019)06-0579-08Multi-scale analysis of liquid film parameter in vertical gas-liquid annular upflow ZHAO Ning¹,ZHANG Lin^1,2, NIU Lina³, LIU Yuhang¹, ZHAO Zhiyue^1,4(1.College of Quality and Technical Supervision, Hebei University, Baoding 071002, China;2. School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China;3.Institute of Thermal and Energy Measurement, Measurement Supervision and Testing Institute of Hebei Province, Shijiazhuang 050051, China;4. College of Mechanical and Electrical Engineering, Cangzhou Normal University, Cangzhou 061001, China)Abstract: Annular flow is one of the most important flow regimes that commonly found in many industrial applications, especially petroleum and chemical industry, air conditioning and refrigeration system and nuclear reactor cooling etc. The time-series signals which are directly related to the thickness of the liquid film are studied by using the wavelet transform processing method and several typical recursive parameters from a multi-scale perspective.The reconstruction coefficients and power spectra of time-series signals - 收稿日期:2019-01-10 基金项目:国家自然科学基金资助项目(61475041);河北省高层次人才项目(B2018003003);河北省教育厅青年基金资助项目(QN2018046);河北大学高层次人才科研启动项目(521000981319);沧州市自然科学基金资助项目(187000003) 第一作者:赵宁(1983—),男,河北保定人,河北大学讲师,博士,主要从事多相流理论及参数检测技术研究.E-mail:zhaoning1983@tju.edu.cn 通信作者:赵治月(1983—),男,河北沧县人,沧州师范学院副教授,河北大学在读博士研究生,主要从事光电检测技术.E-mail:zzyue1123@163.com第6期赵宁等:垂直上升气液环状流液膜参数多尺度分析are obtained. By analyzing the two recursive parameters, the detorminism and the average diagonal line length, the relationship between the change of the liquid film thickness and the input parameters can be obtained. The paper provides an effective technological means for better understanding of membrane fluctuation and evolution.

Key words: disturbance wave, liquid film, wavelet analysis, multi-scale, recursive analysis