Abstract
In the early stage of natural gas extraction, the fracturing and blowout process is often used to obtain stable production. However, during the fracturing process, natural gas combustion is frequently directly released, which causes significant pollution to the environment and a waste of resources. In order to measure the flow rate of the gas-liquid mixture in the process of gas well blowout, a multi-channel velocity measurement model is established. The multi-channel sensor structure is designed based on an analysis of the gas well blowout process and fluid configuration simulations. The influence of pipe diameter on the flow characteristics of gas-liquid two-phase flow was analyzed by FLUENT software. The simulation results show that the distribution of flow velocity in a gas-liquid two-phase flow tube is not uniform, the flow velocity of different flow layers is different, and the stratification phenomenon is more obvious with the increase of pipe diameter, highlighting the necessity of multi-channel measurements. Therefore, we developed a gas-liquid two-phase flow velocity measuring device. The experimental results demonstrate that accurately describing velocity in the tube can be achieved by measuring velocities in different channels using the gas-liquid two-phase flow velocity measurement device.
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