| 子波分析识别环流反应器泡状结构实验 |
| |
| 引用本文： | 姜楠,时剑.子波分析识别环流反应器泡状结构实验[J].化学工程,2006,34(3):33-35,42. |
| |
| 作者姓名： | 姜楠 时剑 |
| |
| 作者单位： | 天津大学,力学系,天津,300072 |
| |
| 基金项目： | 国家自然科学基金联合资助项目(10002011)、(10232020) |
| |
| 摘 要： | 用热膜测速技术以高于对应最小湍流时间尺度的分辨率精细测量了环流反应器内气液二相流速度的时间序列信号,对气液二相流速度信号中自动识别泡状流结构进行了研究。用子波分析方法,将热膜测速仪输出的气液二相流混合速度信号在时域空间和频域空间同时进行时频双局部化多尺度分解,研究了气液二相流中液相流和泡状流结构的分尺度时域特征和分尺度能谱等统计特征,利用子波能谱分析的能量最大准则,提出了一种用子波变换自动识别气液二相流中泡状流结构的新方法。
|
| 关 键 词： | 热膜测速仪 气液二相流 泡状流 子波分析 能量最大准则 |
| 文章编号： | 1005-9954（2006）03-0033-03 |
Experimental investigation of discriminating bubbly flow structure in a reflux reactor based on wavelet analysis |
| |
| JIANG Nan,SHI Jian.Experimental investigation of discriminating bubbly flow structure in a reflux reactor based on wavelet analysis[J].Chemical Engineering,2006,34(3):33-35,42. |
| |
| Authors: | JIANG Nan SHI Jian |
| |
| Affiliation: | Department of Mechanics , Tianjin University ,Tianjin 300072, China |
| |
| Abstract: | The velocity time sequence of gas-liquid two-phase flow at different vertical locations in a reflux reactor was finely measured by constant-temperature hot-film anemometer with resolution higher than the frequency that(corresponds) to Kolmogorov dissipative scale.The automatic discrimination of bubbly flow structure in gas-liquid two-phase flow was studied.The wavelet analysis was used to perform the time-frequency double local(decomposition) in time space and frequency space for the hot-film anemometer output mixed signal of the gas-liquid two-phase flow.The multi-scale character of bubbly flow structure in time space,the energy evolution across scales and other statistic characters were studied.With the use of energy maxima criterion,a new method of automatic(discriminating) the bubbly flow structure in gas-liquid two-phase flow was developed. |
| |
| Keywords: | hot-film anemometer gas-liquid two-phase flow bubbly flow wavelet analysis energy maxima criterion |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
