Numerical Simulation of Flow Pattern in Horizontal Pipe in Mountainous Area
[Purposes]Due to the corrosion environment caused by liquid accumulation in the low-lying area of the pipeline in mountainous areas,the pipeline cannot be opened due to high sulfur content.Therefore,it is necessary to study how to intuitively understand the internal flow pattern of the pipeline.[Methods]Therefore,this paper uses CFD(VOF and RNG k-ε)to explore the flow pattern distribution,pressure distribution,gas content and other processes of horizontal pipeline with variable speed and vari-able liquid content.[Findings]The results showed that:under common working conditions of a certain gas field flow,the flow pattern in the pipeline is mainly laminar flow.When the flow velocity and liquid content increase,the flow pattern changes.When Vmix=9.00 m/s,Vol=0.3,stratified flow entraining(wave and bubbles)appears,showing a transition state.When the flow rate and liquid content continue to in-crease,the certain(wave,bubble)of stratified flow becomes a bubble flow.[Conclusions]It is found that there is a primary and secondary competition between the liquid content and the flow rate of the horizon-tal pipe under common working conditions in a mountainous area.The increase of the flow rate will in-crease the disturbance of the gas-liquid interface and enhance the liquid carrying capacity,which will help to avoid the corrosion of the liquid accumulation.The research results can provide a reference for the study of the flow pattern of horizontal pipelines in mountainous areas.
gas contentgas-liquid two-phase flowoil and gas pipelineflow pattern distribution
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