散状物料斜面出流下落过程流动特性研究
发布时间：2018-09-12 16:25
【摘要】：利用DPM-CFD模型对斜面出流散状物料下落过程中气流速度的分布规律、颗粒的扩散和运动特性进行了研究.研究发现,随着下落高度的增加空气流速先增后减,且颗粒流周围有明显的涡流产生.颗粒流质量流量和初始速度增加均会导致空气速度的峰值及偏移位移增加.颗粒流质量流量对空气速度峰值的影响较大;而出流速度对空气速度峰值偏移位移的影响较大.同时,颗粒流质量流量和初始速度也使颗粒物浓度峰值的偏移位移有所增加,但增大质量流量会导致浓度峰值增加,而初始速度的增加则会减小浓度峰值.颗粒物的质量流量和初始速度对浓度峰值的影响程度相当,而颗粒流初始速度对峰值偏移位移的影响程度略大于质量流量.
[Abstract]:DPM-CFD model was used to study the distribution of gas velocity, particle diffusion and motion characteristics during the falling process of oblique outflow material. It is found that the velocity of air increases first and then decreases with the increase of falling height, and there is an obvious eddy current around the particle flow. The increase of mass flow rate and initial velocity of particle flow will increase the peak value of air velocity and offset displacement. The mass flow rate of particle flow has a great influence on the peak value of air velocity, while the velocity of outlet flow has a great effect on the shift displacement of the peak value of air velocity. At the same time, the mass flow rate and initial velocity of particle flow also increase the shift displacement of the peak concentration of particulate matter, but the increase of mass flow rate will lead to the increase of peak concentration, and the increase of initial velocity will decrease the peak value of concentration. The influence of particle mass flow rate and initial velocity on the peak concentration is similar, while the influence of initial particle flow velocity on peak migration displacement is slightly greater than that of mass flow rate.
【作者单位】： 河北工程大学能源与环境工程学院;河南省交通规划设计研究院股份有限公司;西安建筑科技大学环境与市政工程学院;
【基金】：国家自然科学基金青年基金项目(51608164)
【分类号】：X964
，
本文编号：2239573
[Abstract]:DPM-CFD model was used to study the distribution of gas velocity, particle diffusion and motion characteristics during the falling process of oblique outflow material. It is found that the velocity of air increases first and then decreases with the increase of falling height, and there is an obvious eddy current around the particle flow. The increase of mass flow rate and initial velocity of particle flow will increase the peak value of air velocity and offset displacement. The mass flow rate of particle flow has a great influence on the peak value of air velocity, while the velocity of outlet flow has a great effect on the shift displacement of the peak value of air velocity. At the same time, the mass flow rate and initial velocity of particle flow also increase the shift displacement of the peak concentration of particulate matter, but the increase of mass flow rate will lead to the increase of peak concentration, and the increase of initial velocity will decrease the peak value of concentration. The influence of particle mass flow rate and initial velocity on the peak concentration is similar, while the influence of initial particle flow velocity on peak migration displacement is slightly greater than that of mass flow rate.
【作者单位】： 河北工程大学能源与环境工程学院;河南省交通规划设计研究院股份有限公司;西安建筑科技大学环境与市政工程学院;
【基金】：国家自然科学基金青年基金项目(51608164)
【分类号】：X964
，
本文编号：2239573
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