关键词: 油气两相流, 湍流扩散, 升力, 终端沉降速度, 衰减系数

Abstract: Droplet spatial distribution is the basic information for the calculation of pressure drop and void fraction of gas-liquid two-phase flow. Based on a detailed analysis of the forces acting on the entrained droplets, one method taking account of the correction of droplet terminal settling velocity due to shear lift force was proposed to modify the droplet turbulent diffusion model. By such a modification the calculated errors of decay coefficient for horizontal oil/gas two-phase separated flow was reduced greatly. As a result, the lift force is one of the important factors to be considered reasonably during the study of droplet diffusion and spatial distribution for oil/gas transport.

Key words: 油气两相流, 湍流扩散, 升力, 终端沉降速度, 衰减系数