工程设计学报2017，Vol.24Issue(2)：174-181,8.DOI:10.3785/j.issn.1006-754X.2017.02.008
新型铁路隧道落煤吸尘装置吸煤特性仿真分析与试验验证
Simulation analysis and experimental verification of coal suction characteristics of the new railway tunnel fallen coal dust collection device
摘要
Abstract
Due to air turbulence, large areas of coal will fall when the special coal-transportation trains pass the tunnel exits and entrances.Aiming at the problems of low efficiency and high cost of manual cleaning for long distance coal cleaning in the tunnel, a new railway tunnel fallen coal dust collection device which was composed of a main conveying coal feeding pipe and multiple branch pipes of coal suction was designed.It was used to clean the small particles and lightweight railway tunnel fallen coal.Firstly, the gas-solid two-phase flow model based on the Euler-Lagrange approach for the design of the main conveying coal feeding pipe was established in the coal conveying pipelines.Secondly, the effect of the coal particles` incident angle and multiple branch pipe spacing on the main coal conveying pipe flow field, which was based on Fluent finite element simulation software, was studied.What was more, the optimal angle of incidence and the optimal value of the number of branch coal suction pipe, which was installed on the main conveying pipe, were analyzed.Finally, the finite element simulation was verified by field test.Simulation and experimental results showed that it was more conducive to the railway tunnel fallen coal transportation when coal particles` incident angle was less than 45° and the branch pipe spacing was in the vicinity of 750 mm.For that when incident angle was less than 45°, the main conveying coal pipe pressure-drop became weaker and particle flow could obtain large horizontal transport velocity.And when the branch pipe spacing was in the vicinity of 750 mm, the horizontal transport velocity had a smaller fluctuation range and the transportation of coal was larger than that of the other groups.The research results are of great significance to improve the structure of the main conveying coal pipe, increase the efficiency of tunnel coal conveying and optimize the railway tunnel coal dust collection device.关键词
气固两相流/数值模拟/管道Key words
gas-solid two-phase flow/numerical simulation/pipe分类
机械制造引用本文复制引用
杨伟杰,孟文俊,邬思敏,刘宝林,齐向东..新型铁路隧道落煤吸尘装置吸煤特性仿真分析与试验验证[J].工程设计学报,2017,24(2):174-181,8.基金项目
国家自然科学基金面上项目(51575370) （51575370）
山西省煤基重点科技攻关项目(MJ2014-09,MJ2014-02) （MJ2014-09,MJ2014-02）
太原科技大学校研究生科技创新项目(20151023) （20151023）
