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中南大学学报(自然科学版)

Journal of Central South University

第51卷    第9期    总第313期    2020年9月

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文章编号:1672-7207(2020)09-2442-09
基于尘粒启动特性的新型吸尘装置流场数值模拟及试验
胡均平1,张灵1, 2,史天亮3,邱显焱2

(1. 中南大学 机电工程学院,湖南 长沙,410083;
2. 湖南工业大学 机械工程学院,湖南 株洲,412007;
3. 中国铁建重工集团有限公司,湖南 长沙,410100
)

摘 要: 根据铁路道床表面不同的吸污工况要求,针对原有产品吸污效率不高的问题,提出新型的吸尘装置结构,建立其物理及数学模型,对不同作业方式的尘粒启动机理进行研究;运用计算流体力学技术对不同参数条件下吸污效率进行仿真分析,并对吸污装置内部气流相和颗粒相进行仿真研究,对2种作业模式试验效果进行验证和对比。研究结果表明:吹吸作业模式适用于灰尘较少工况,吹扫吸作业模式则能满足能够满足污物较大且堆积较厚的工况,尤其适用于运煤专线线路煤粉的收集。

 

关键字: 铁路道床;吸尘装置;吹扫吸;流场仿真;气固两相流

Flow field numerical simulation and experiment for a new type of dust suction apparatus based on dust start-up characteristics
HU Junping1, ZHANG Ling1, 2, SHI Tianliang3, QIU Xianyan2

1. School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;
2. School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China;
3. China Railway Construction Heavy Industry Co. Ltd., Changsha 410100, China

Abstract:According to the requirements of different suction conditions on the surface of railway ballast bed, in view of the efficienoy deficiencies of the original product, a new structure of dust suction was proposed. The physical and mathematical models were established to study the start-up principle of dust particles in different operation modes, and the suction efficiency with different parameters was simulated and analyzed by using computational fluid dynamics technology. Subsequently, the airflow phase and particle phase in the suction apparatus were simulated. The experimental results of two operation modes were verified and compared. The results show that the blow-suction mode is suitable for the less dust conditions, while the blow-sweep-suction mode can satisfy the conditions of larger dirt and thicker accumulation, especially for the collection of pulverized coal in the special line for coal transportation.

 

Key words: railway ballast bed; dust suction apparatus; blow-sweep-suction; flow field simulation; gas-solid two-phase flow

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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