摘要
基于试验研究,探讨了不同颗粒粒径(d)、堵管高度(H)、流体平均流速(V)条件下粗颗粒在垂直扬矿管道中堵管后再起动的临界条件。研究结果表明:(a)d和H是影响单位长度压差(ΔP)与V关系的2个重要参数。(b)当ΔP与V呈线性关系时,垂直管道堵管后颗粒将无法实现再起动;反之,如若二者呈非线性关系,则颗粒可实现再起动。(c)基于试验结果提出的颗粒再起动时的临界流速、临界单位长度压差计算公式符合精度要求。
Through a self-developed pipeline test, the critical conditions of jam and re-initiation of coarse particle motion in pipelines of a deep-sea mining vertical riser with different particle sizes, heights of jam, and average flow velocities were investigated. The results are as follows- （a） the particle size and the height of the jam have a significant effect on the relationship between the pressure gradient and average flow velocity; （b） when the relationship between the pressure gradient and average flow velocity is linear, the pipeline is jammed, and if it is nonlinear, the particle motion can be re-initiated; and （c） a critical condition formula was developed and verified by experimental data, and it met accuracy requirements.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第5期446-451,共6页
Journal of Hohai University(Natural Sciences)
基金
中央民族大学985工程项目(MUC98507-08)
国家自然科学基金(50879096
51179213
51209238)
关键词
深海采矿
垂直扬矿管道堵塞
颗粒粒径
堵管高度
流体平均流速
颗粒起动I临界条件
deep-sea mining
pipeline of vertical riser in jam conditions
particle diameter
jam height
average flow velocity
critical condition of re-initiation of particle motion
