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油水两相流中油相流量的测量 被引量:3
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作者 李峰 谭超 董峰 《控制工程》 CSCD 北大核心 2018年第9期1698-1702,共5页
水平油水两相流在石油、化工工业中广泛存在,其过程参数的实时测量,对于指导和控制工业生产过程有重大意义。针对单一传感器很难对油水混合流中的油相流量进行准确测量,采用卡尔曼估计理论,将电导传感器与差压传感器的测量信息相融合,... 水平油水两相流在石油、化工工业中广泛存在,其过程参数的实时测量,对于指导和控制工业生产过程有重大意义。针对单一传感器很难对油水混合流中的油相流量进行准确测量,采用卡尔曼估计理论,将电导传感器与差压传感器的测量信息相融合,实现了油相流量的测量;针对实际工业过程中,油水并非均匀混合,对电导测量模型进行修正,进一步的实验结果表明,修正后的模型提高了油相流量的测量精度。 展开更多
关键词 水两 油相流量 卡尔曼估计 电导传感器 差压传感器
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Voidage Measurement of Gas-Oil Two-phase Flow 被引量:3
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作者 王微微 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2007年第3期339-344,共6页
A new method for the voidage measurement of gas-oil two-phase flow was proposed.The voidage measurement was implemented by the identification of flow pattern and a flow pattern specific voidage measure- ment model.The... A new method for the voidage measurement of gas-oil two-phase flow was proposed.The voidage measurement was implemented by the identification of flow pattern and a flow pattern specific voidage measure- ment model.The flow pattern identification was achieved by combining the fuzzy pattern recognition technique and the crude cross-sectional image reconstructed by the simple back projection algorithm.The genetic algorithm and the partial least square method were applied to develop the voidage measurement models.Experimental results show that the proposed method is effective.It can overcome the influence of flow pattern on the voidage measure- ment,and also has the advantages of simplicity and speediness. 展开更多
关键词 VOIDAGE two-phase flow genetic algorithm TOMOGRAPHY partial least square method
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Liquid holdup measurement with double helix capacitance sensor in horizontal oil-water two-phase flow pipes 被引量:6
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作者 翟路生 金宁德 +1 位作者 高忠科 王振亚 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第1期268-275,共8页
This paper presents the characteristics of a double helix capacitance sensor for measurement of the liquid holdup in horizontal oil–water two-phase flow. The finite element method is used to calculate the sensitivity... This paper presents the characteristics of a double helix capacitance sensor for measurement of the liquid holdup in horizontal oil–water two-phase flow. The finite element method is used to calculate the sensitivity field of the sensor in a pipe with 20 mm inner diameter and the effect of sensor geometry on the distribution of sensitivity field is presented. Then, a horizontal oil–water two-phase flow experiment is carried out to measure the response of the double helix capacitance sensor, in which a novel method is proposed to calibrate the liquid holdup based on three pairs of parallel-wire capacitance probes. The performance of the sensor is analyzed in terms of the flow structures detected by mini-conductance array probes. 展开更多
关键词 Horizontal oil–water two-phase flow Liquid holdup measurement Double helix capacitance sensor Flow pattern
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Testing for Nonlinearity in Dynamic Characteristics of Vertical Upward Oil-Gas-Water Three-phase Bubble and Slug Flows 被引量:1
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作者 朱雷 金宁德 +2 位作者 高忠科 杜萌 王振亚 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第5期870-882,共13页
Based on the conductance fluctuation signals measured from vertical upward oil-gas-water three-phase flow experiment, time frequency representation and surrogate data method were used to investigate dynamical characte... Based on the conductance fluctuation signals measured from vertical upward oil-gas-water three-phase flow experiment, time frequency representation and surrogate data method were used to investigate dynamical characteristics of oil-in-water type bubble and slug flows. The results indicate that oil-in-water type bubble flow will turn to deterministic motion with the increase of oil phase fraction f o and superficial gas velocity U sg under fixed flowrate of oil-water mixture Q mix . The dynamics of oil-in-water type slug flow becomes more complex with the increase of U sg under fixed flowrate of oil-water mixture. The change of f o leads to irregular influence on the dynamics of slug flow. These interesting findings suggest that the surrogate data method can be a faithful tool for characterizing dynamic characteristics of oil-in-water type bubble and slug flows. 展开更多
关键词 oil-gas-water three-phase flow conductaJace fluctuating signals time-frequency representation surrogate data method
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Breakup Structure of Two-phase Jets with Various Momentum Flux from a Porous Injector 被引量:2
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作者 Inchul Lee Dohun Kim Jaye Koo 《Journal of Thermal Science》 SCIE EI CAS CSCD 2014年第1期60-67,共8页
Spray structure and atomization characteristics were investigated through a comparison of a porous and a shear coaxial injector. The porous injector shows better atomization performance than the shear coaxial injector... Spray structure and atomization characteristics were investigated through a comparison of a porous and a shear coaxial injector. The porous injector shows better atomization performance than the shear coaxial injector. To in- crease atomization performance and mixing efficiency of two-phase jets, a coaxial porous injector which can be applicable to liquid rocket combustors was designed and tested. The characteristics of atomization and spray from a porous and a shear coaxial injector were characterized by the momentum flux ratio. The breakup mechanism of the porous injector is governed by Taylor-Culick flow and axial shear forces. Momentum of injected gas flow through a porous material which is composed of sintered metal is radically transferred to the center of the liquid column, and then liquid column is effectively broken up. Although the shapes of spray from porous and shear co- axial jets were similar for various momentum ratio, spray structures such as spray angle and droplet sizes were different. As increasing the momentum flux ratio, SMD from the porous injector showed smaller value than the shear coaxial injector 展开更多
关键词 Porous injector Shear coaxial injector Breakup mechanism Momentum flux ratio
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