单喷嘴气化炉内稠密气-固两相旋流浓度场研究

Study on two-dimensional dense gas-solid flow swirling particle concentration field in gasifier with single nozzle

旋转射流在实际工程中应用广泛,利用PV6D颗粒测速仪测量了旋转射流气化炉内颗粒的浓度场特性。结果表明:加旋情况下,喷嘴轴线处的颗粒浓度较不加旋时衰减快,在气化炉上部的测量截面上,颗粒浓度的径向呈"驼峰"分布,而在气化炉下部则分布较均匀;随着固气质量比和颗粒粒径的减小,颗粒轴线的相对浓度衰减加快。

Swirling jets is widely used in engineering,the characteristics of particle concentration field in swirling jets gasifier is investigated by PV6D.The results show that the particle concentration in jet axis decays faster in swirling jet than in normal jet,and the particle concentration distribution is a hump shape in the upper part of gasifier,while particle distribute homogeneously in the opposite position.With the decrease of solid-gas ratio and particle diameter,the decay speed of the axial distribution of particle concentration accelerates.