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《Journal of Chemical Engineering of Chinese Universities》 1999-04
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Application of Wavelets Transform to the Fuzzy Identification of Gas-Liquid Two-Phase Flow Regimes

CHEN Gong; WANG Bac-hang; YANG Jiang; LI Hat-qing(National Laboratory of Industrial Control Technique, Zhejiang University, Hangzhou 310027, China)  
A novel method for the on-line identification of flow regimes of gas-liquid two-phase flowsystem based on the wavelets transform is presented. The pipeline pressure drop are adopted for signalprocessing and the Haar wavelet is selected as the mother wavelet. Based on the wavelet coefficients,different time-frequency characteristics in six flow regimes are analyzed, and a criterion of identifyingthe flow regimes is proposed based on the fuzzy set theory. The experiments are carried out inhorizontal pipe and 5°, 15°, 25° incline up-stream pipe. The experimental results show that it isfeasible for the flow regimes identification of bubbly, stratified, wavy, plug, slug and annular flow ingas-liquid two-phase flow system.
【Fund】: 国家自然科学基金!59995460
【CateGory Index】: TQ022.4
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