基于CFD动网格的双箕斗运行气动侧向力研究

1.中国恩菲工程技术有限公司,北京 100038; 2.中国有色金属建设股份有限公司,北京,100029

计算流体力学; 箕斗运行; 气动侧向力

Lateral aerodynamic force research on double skips operating characteristics based on CFD moving mesh grid
SUN Yang1,XU Chang-lei1,HAO Rong2,DU Gui-wen1

(1.China ENFI Engineering Corporation,Beijing 100038,China; 2.China Nonferrous Metal Industry's Foreign Engineering and ConstructionCo.,Ltd,Beijing 100029,China)

computational fluid dynamics; skip operating; lateral aerodynamic force

DOI: 10.13800/j.cnki.xakjdxxb.2016.0122

备注

深井安全间隙是矿井向深部延伸要解决的典型提升问题之一,箕斗运行引起的空气动力响应是开展深井安全间隙研究的首要分析因素,也是引起箕斗偏摆的主要原因。将基于CFD的空气动力学计算引入到竖井箕斗运行过程气动压力分析中,依托某金属矿山工程背景,应用计算流体力学(CFD)的动网格技术和标准κ-ε双方程湍流模型对箕斗运行过程中的外流场压力变化进行数值分析。通过监测双箕斗运行相向、相会、背离的整个过程中箕斗侧向压力的变化,对箕斗稳态运行及相遇瞬态过程中的压力变化进行研究,并与国内外相关研究成果对比分析。研究表明:箕斗相会的过程中,流场变化剧烈; 箕斗的侧向压力值瞬间增大,首先朝向井壁方向,而后反向增加至最大值,最后恢复稳态运行。对于高速提升的深井安全间隙确定,应充分考虑气动侧向力引起的箕斗偏摆; 高速提升的深竖井断面布置应加大提升容器与井壁之间的安全间隙,适度增加提升容器之间的安全间隙。

Hoisting safety clearance of vertical shaft is a key technical issue to extend to deep mining.Aerodynamic effect of hoisting skips is a key factor to ensure hoisting safety clearance and calculate oscillating.The aerodynamic analysis of CFD method is used in lateral force research of double skips during operating.Based on actual engineering background,outflow pressure of double skips is analyzed by moving mesh grid and standard κ-ε transient equations.The variety curves are obtained by monitoring lateral force.It will be used for analyzing steady force and buffeting force rule which includes face-to-face,crossing,and deviating.The results are contrasted with relative international and national research.The results show that flow field generates huge changes of value and direction during passing through time.First aerodynamic directs to shaft wall side,then changes to another direction and restores to steady state operating.The skips oscillating of aerodynamic effect must be considered to ensure safety clearance for deep vertical shaft.Clearance between container and shaft wall should be enlarged and it between container and container also be enlarged slightly in deep and high speed hoisting mine vertical shaft.