随着研究的不断深入,低浓度瓦斯-细水雾两相流体管道安全输送技术在煤矿中开始应用。为了弄清瓦斯气体管道输送时局部管件处的压力损失情况,对瓦斯-细水雾输送管道90°弯管处压降情况进行数值模拟和试验研究。结果表明:90°弯管处两相流体的压降随速度的增加而增大;随管径的增大而减小;随弯径比的增大而先减小后增大,最佳弯径比为2.8~3.2。90°弯管处的压降试验验证了数值模拟的结果。 With the deepening of research, low concentration gas-water mist dual-phase fluid pipeline safety delivery technology began to be applied in coal mines. In order to find out the pressure loss at the local pipe when transporting the gas pipeline, the numerical simulation and experimental research on the pressure drop at 90 ° elbow of the gas-water mist pipeline was carried out. The results show that the pressure drop of two-phase fluid at 90 ° elbow increases with the increase of velocity, decreases with the increase of diameter, decreases first and then increases with the increase of elbow ratio, Diameter ratio of 2.8 ~ 3.2.90 ° bend at the pressure drop test verified the numerical simulation results.