Analysis of pressure fluctuations for oil-gas two-phase flow in a horizontal pipe using the bubble number density equation

被引:4
作者
Li, Yongjiang [1 ]
Yu, Zhiyi [1 ]
Ye, Qing [1 ]
Yang, Jianxin [1 ]
Hayat, Shazia [2 ]
机构
[1] Beijing Inst Technol, Sch Mech Engn, Beijing, Peoples R China
[2] Univ Engn & Technol, Lahore, Punjab, Pakistan
关键词
Bubble number density; horizontal pipes; oil-gas flow; pressure fluctuations; SIMULATION;
D O I
10.1080/00986445.2020.1869950
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Visualization experiments and numerical simulations of two-phase flow are conducted to study the pressure fluctuation characteristics of oil-gas flow in horizontal pipes. The two-fluid model based on the Eulerian-Eulerian method is adopted, and the bubble number density equation (BNDE) is introduced to the simulation to predict the bubble size and distribution within the pipe. The bubble size and pressure variations in the pipe obtained from the simulations agree well with the recorded values from the experiments. The fast Fourier transform (FFT) algorithm is used to analyze the characteristics of pressure fluctuations, and the results show that the sudden pressure increase in the pipe sections is related to gas injection. The bubble number density increases with liquid flow rate (Q(l) ), which causes the oil-gas flow to be more turbulent while increasing the amplitude of high-frequency fluctuations. The maximum amplitude for the dominant frequency is observed near the pump inlet for low liquid flow rates. At high liquid flow rates, more liquid vortices are found near the gas orifice, and there is a maximum amplitude for the dominant frequency in this section. Due to the high swirling strength at larger inlet gas volume fraction (IGVF), there is an obvious increase in the amplitude of low-frequency fluctuations, while the amplitude of high-frequency fluctuations is nearly the same under all IGVF.
引用
收藏
页码:351 / 364
页数:14
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