TY - JOUR N2 - To find effective and practical methods to distinguish gas-liquid two-phase flow patterns, new flow pattern maps are established using the differential pressure through a classical Venturi tube. The differential pressure signal was first decomposed adaptively into a series of intrinsic mode functions (IMFs) by the ensemble empirical mode decomposition. Hilbert marginal spectra of the IMFs showed that the flow patterns are related to the amplitude of the pressure fluctuation. The cross-correlation method was employed to sift the characteristic IMF, and then the energy ratio of the characteristic IMF to the raw signal was proposed to construct flow pattern maps with the volumetric void fraction and with the two-phase Reynolds number, respectively. The identification rates of these two maps are verified to be 91.18% and 92.65%. This approach provides a cost-effective solution to the difficult problem of identifying gas-liquid flow patterns in the industrial field. L1 - http://journals.pan.pl/Content/111959/PDF/03_MMS-2019-2_06-12.pdf L2 - http://journals.pan.pl/Content/111959 PY - 2019 IS - No 2 EP - 252 DO - 10.24425/mms.2019.128352 KW - gas-liquid two-phase flow KW - flow pattern map KW - Venturi tube KW - pressure fluctuation KW - energy ratio KW - ensemble empirical mode decomposition A1 - Sun, Zhiqiang A1 - Chen, Luyang A1 - Yao, Fengyan PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 26 DA - 2019.06.25 T1 - New gas-liquid two-phase flow pattern maps based on the energy ratio of pressure fluctuation through a Venturi tube SP - 241 UR - http://journals.pan.pl/dlibra/publication/edition/111959 T2 - Metrology and Measurement Systems ER -