• TRANSPORT PHENOMENA & FLUID MECHANICS • 上一篇 下一篇
闻建平a;贾晓强a;周怀a;刘宝谈b;李瑞b
WEN Jianpinga; JIA Xiaoqianga; ZHOU Huaia; LIU Baotanb; LI Ruib
摘要: Hydrodynamic and turbulent structures in the trayed bubble column with 1.2m inner diameter have been characterized from liquid-phase velocity-time series data obtained by the hot-film anemometer. Wavelet transform analysis was used for denoising the measured data and also for evaluating quantifiers of t
urbulence, viz., local intermittency measure, intermittency index and flatness factor. These quantifiers help in detecting the passage of bubbles and reveal the hidden structures and patterns in data. Also, the wavelet scalewise analysis of the turbulence at various locations in the column and under dif
ferent operating conditions could be used to build a direct relationship between the local gas holdup and flatness factor. The methodology is therefore suitable for online evaluation of the trayed bubble column performance and shows promise for developing strategies for improving process performance.