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《中国化学工程学报(英文版)》 2006-01
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Flow Regime Identification of Gas-liquid Two-phase Flow Based on HHT

SUN Bin a,b, ZHANG Hongjian a,**, CHENG Lu a and ZHAO Yuxiao a a Department of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China b College of Metrological Technology and Engineering, China Jiliang University, Hangzhou 310018, China  
A new method to identify flow regime in two-phase flow was presented, based on signal processing of differ-ential pressure using Hilbert Huang transform (HHT). Signals obtained from a Venturi meter were decomposed into dif-ferent intrinsic mode functions (IMFs) with HHT, then the energy fraction of each intrinsic mode and the mean value of residual function were calculated, from which the rules of flow regime identification were summarized. Experiments were carried out on two-phase flow in the horizontal tubes with 50mm and 40mm inner diameter, while water flowrate was in the range of 1.3m3·h-1 to 10.5m3·h-1, oil flowrate was from 4.2m3·h-1 to 7.0m3·h-1 and gas flowrate from 0 to 15m3·h-1. The results show that the proposed rules have high precision for single phase, bubbly, and slug, plug flow re-gime identification, which are independent of not only properties of two-phase fluid. In addition, the method can meet the need of industrial application because of its simple calculation.
【Fund】: Supported by National High-tech Research and Development Foundation of China (No.2001AA413210).
【CateGory Index】: TQ021
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