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《Journal of Zhejiang University(Engineering Science)》 2006-01
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Analysis of differential pressure fluctuation signal of gas-liquid two-phase flow based on higher-order spectrum

DING Hao,HUANG Zhi-yao,LI Hai-qing(Deptartment of Control Science and Engineering,National Key Labortary of Industrial Control Technology,Zhejiang University,Hangzhou 310027,China)  
A new method based on higher-order spectrum was proposed to analyze the differential pressure fluctuation signal in this study on the non-Gaussian characteristics of the differential pressure fluctuation signal of gas-liquid two-phase flow in horizontal pipeline.The non-Gaussian characteristics of differential pressure fluctuation signal of different flow patterns were extracted by using bispectral method. The average bispectral magnitude of differential pressure fluctuation signal was taken as an eigenvalue for the quantitative analysis of the deviation degree from normality.Meanwhile,the signal bispectral features and non-Gaussian characteristics of different flow patterns under different pipeline diameters of were discussed.The experimental results show that the extracted eigenvalue reflects the deviation degree from normality and that the transition of flow patterns can be determined from the extracted eigenvalue.
【Fund】: 国家自然科学基金资助项目(50576084)
【CateGory Index】: O359.1
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