Investigation of the exploitation of a fast-sampling single gamma densitometer and pattern recognition to resolve the superficial phase velocities and liquid phase water cut of vertically upward multiphase flows

Blaney, S.; Yeung, Hoi

doi:10.1016/j.flowmeasinst.2007.09.002

Cited by 59 publications

(20 citation statements)

References 12 publications

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“…to which water is pumped by a rotary pump (4) and air from the compressor (5) by an injector nozzle (7). Due to that the controlled mixture of water and air supply the measuring pipe and flowing up to the air-removing tank (6). The measurement of air bubbles velocity and flow regime recognition was arrange by the measuring system consisting of two linear γ-radioactive sources, 241 Am (1) with an activity of 100 mCi and two probes with NaI(Tl) (2) scintillation detector.…”

Section: Laboratory Standmentioning

confidence: 99%

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Application of spectral analysis in radiometric measurements of twophase liquid-gas flow

Zych

Hanus

Petryka

2014

MATEC Web of Conferences

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Abstract. This article presents use of the classical spectral analysis to identify a type of flow in investigation of gas transportation by liquid with a measurement of gamma radiation absorption. During numerous experiments it was found that a magnitude of the cross-spectral density distribution of recording signals reveals type of air-water mixture flow in a horizontal pipeline. As an example, some results of laboratory measurements equipped in 241 Am radiation source and scintillation probes with of NaI(Tl) crystals are presented. Moreover attached figures facilitate interpretation of observed results and in details illustrating the proposed method.

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Section: Laboratory Standmentioning

confidence: 99%

“…Currently, those flows may be examined by such methods as computer tomography (resistive, capacitive, optical and X-rays), Coriolis flowmeters, optical equipment, and nuclear techniques [1][2][3][4][5][6]. The latter one are also used by the authors of this article in studies of gas-liquid and liquid-solids flows [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Application of spectral analysis in radiometric measurements of twophase liquid-gas flow

Zych

Hanus

Petryka

2014

MATEC Web of Conferences

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“…Recent works show use of machine learning methods as e.g. artificial neural networks (ANN) [9][10][11][12][13][14][15][16][17][18] for this purpose. The flow structures classification with ANN is comprised of three steps: data acquisition and pre-processing, feature extraction, and structures classification.…”

Section: Introductionmentioning

confidence: 99%

Application of ANN and PCA to two-phase flow evaluation using radioisotopes

et al. 2017

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Abstract. In the two-phase flow measurements a method involving the absorption of gamma radiation can be applied among others. Analysis of the signals from the scintillation probes can be used to determine the number of flow parameters and to recognize flow structure. Three types of flow regimes as plug, bubble, and transitional plug -bubble flows were considered in this work. The article shows how features of the signals in the time and frequency domain can be used to build the artificial neural network (ANN) to recognize the structure of the gas-liquid flow in a horizontal pipeline. In order to reduce the number of signal features the principal component analysis (PCA) was used. It was found that the reduction of signals features allows for building a network with better performance.

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“…A quantitative description of flow regimes can be obtained by the analysis of the signals registered in radioisotope measurements. According to [22][23][24][25][26][27][28][29][30][31] …”

Section: Introductionmentioning

confidence: 99%

Signals features extraction in liquid-gas flow measurements using gamma densitometry. Part 1: time domain

Hanus

Zych

Petryka

et al. 2016

EPJ Web of Conferences

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Abstract. The paper presents an application of the gamma-absorption method to study a gas-liquid two-phase flow in a horizontal pipeline. In the tests on laboratory installation two 241 Am radioactive sources and scintillation probes with NaI(Tl) crystals have been used. The experimental set-up allows recording of stochastic signals, which describe instantaneous content of the stream in the particular cross-section of the flow mixture. The analyses of these signals by statistical methods allow to determine the mean velocity of the gas phase. Meanwhile, the selected features of signals provided by the absorption set, can be applied to recognition of the structure of the flow. In this work such three structures of air-water flow as: plug, bubble, and transitional plug -bubble one were considered. The recorded raw signals were analyzed in time domain and several features were extracted. It was found that following features of signals as the mean, standard deviation, root mean square (RMS), variance and 4 th moment are most useful to recognize the structure of the flow.

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Investigation of the exploitation of a fast-sampling single gamma densitometer and pattern recognition to resolve the superficial phase velocities and liquid phase water cut of vertically upward multiphase flows

Cited by 59 publications

References 12 publications

Application of spectral analysis in radiometric measurements of twophase liquid-gas flow

Application of spectral analysis in radiometric measurements of twophase liquid-gas flow

Application of ANN and PCA to two-phase flow evaluation using radioisotopes

Signals features extraction in liquid-gas flow measurements using gamma densitometry. Part 1: time domain

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