DocumentCode :
2688716
Title :
Nonperiodic cycle detection and application in gas liquid two-phase flow
Author :
Du, Yuncheng ; Wang, Huaxiang ; Du, Dongping
Author_Institution :
Tianjin Key Lab. of Process Meas. & Control, Tianjin Univ., Tianjin, China
fYear :
2010
fDate :
3-6 May 2010
Firstpage :
255
Lastpage :
258
Abstract :
Nonperiodic cycle detection methods for gas/liquid two phase flow system were discussed. Cycle detection methods, such as Hurst analysis, the V statistic and the P statistic were briefly reviewed; in addition, a modified P statistic method was introduced. Two types of time series, i.e. mathematically sine wave time series and experimental electrical capacitance tomography time series of plug flow and slug flow under different flow conditions were investigated to verify the effectiveness of different cycle detection methods. The sine wave time series and sine wave time series under gauss noise were used to validate different cycle detection methods. For the electrical capacitance tomography time series of different flow regime, discrete wavelet transform (DWT) was adopted to decompose the original signal into approximate signal and detail signals, and then different cycle detection methods were mainly applied to realize cyclic characterization analysis of detail signals for plug flow and slug flow. The results show that the nonperiodic cycle characteristic analysis can reflect the property of different flow regimes.
Keywords :
tomography; two-phase flow; Hurst analysis; P statistic; V statistic; cycle detection methods; discrete wavelet transform; electrical capacitance tomography time series; gas liquid two-phase flow; nonperiodic cycle detection; plug flow; sine wave time series; slug flow; Discrete wavelet transforms; Electrical capacitance tomography; Fluid flow; Gaussian noise; Phase detection; Plugs; Signal analysis; Statistical analysis; Time series analysis; Wavelet analysis; Hurst exponent; cycle detection; electrical capacitance tomography; modified P statistic; wavelet;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2010 IEEE
Conference_Location :
Austin, TX
ISSN :
1091-5281
Print_ISBN :
978-1-4244-2832-8
Electronic_ISBN :
1091-5281
Type :
conf
DOI :
10.1109/IMTC.2010.5488171
Filename :
5488171
Link To Document :
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