竖直管内导流叶片形成的气液旋流场的数值模拟研究

Simulation of Gas-Liquid Swirling Flow Field Formed by Guide Vanes in Vertical Tubes

利用CFD FLUENT对竖直管内导流叶片形成的气液旋流场进行数值模拟研究分析。发现气液混合流体经过导流叶片后会形成环状流,且气液分离效果沿着管线逐步增加,存在气液分离最佳位置。在管道中心和管壁处的切向速度最小,随着流动发展,切向速度变小。轴向速度沿着管线先变大后变小,管道中心处出现最大值。管内压力场呈现中心低外围高,且沿着流动方向,外围和中心压差逐渐减小,压力曲线趋于平缓。

This paper conducted numerical simulation research and analysis on the gas-liquid swirling flow field formed by the guide vanes in the vertical tube with the implementation of CFD FLUENT.It is found that the gas-liquid mixed fluid forms an annular flow after passing through the guide vanes,and the gas-liquid separation effect is gradually increased along the pipeline with the existence of the best location of gas and liquid separation.The tangential velocity at the center of the pipe and the pipe wall is the smallest and decreases with the development of the flow.The axial velocity increases first and then decreases along the pipeline,with the maximum value appears at the center of the pipe.The pressure field in the tube is low in the center and high in the periphery,and along the flow direction,the pressure difference between the periphery and the center gradually decreases,and the pressure curve tends to be flattened.