[1]任晓芬,王 怡,段梦婕,等.自由下落颗粒流流动特性的实验研究[J].西安建筑科技大学学报(自然科学版),2017,49(01):131-134,144.[doi:10.15986/j.1006-7930.2017.01.021]
　REN Xiaofen,WANG Yi,DUAN Mengjie,et al.Experimental study on falling process characteristics of the free falling particle stream[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2017,49(01):131-134,144.[doi:10.15986/j.1006-7930.2017.01.021]
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自由下落颗粒流流动特性的实验研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
49
期数:
2017年01期
页码:
131-134,144
栏目:
出版日期:
2017-03-03

文章信息/Info

Title:
Experimental study on falling process characteristics of the free falling particle stream
文章编号:
1006-7930(2017)01-0131-04
作者:
任晓芬1; 2; 王 怡2; 段梦婕2; 初宗坤2; 3; 屈欣瑞2; 曹莹雪2
(1. 河北工程大学能源与环境工程学院,河北 邯郸 056038 ; 2. 西安建筑科技大学环境与市政工程学院,陕西 西安 710055 ; 3. 河南省交通规划设计研究院股份有限公司,河南 郑州 450099 )
Author(s):
REN Xiaofen 1; 2;  WANG Yi 2;  DUAN Mengjie 2;  CHU Zongkun 2; 3;  QU Xinrui 2;  CAO Yingxue 2
(1. College of Energy and Environmental Engineering, Hebei Univ. of Eng., Handan, 056038, China ; 2. School of Environmental and Municipal Engineering, Xi’an Univ. of Arch. Tech., Xi’an, 710055, China ; 3. Henan Provincial Communications Planning & Design Institute Co., Zhengzhou, 450099, China)
关键词:
实验方法; 自由下落; 颗粒流; 流动特性
Keywords:
experimental method;  free falling;  granular stream;  flow characteristics
分类号:
TU 834
DOI:
10.15986/j.1006-7930.2017.01.021
文献标志码:
A
摘要:
为了更全面细致地阐明工业建筑中生产过程运输物料时的产尘机理，本研究运用实验方法通过改变下落高度及出流口径，对颗粒流下落过程的轴心速度、颗粒流扩散规律进行了研究，利用高速摄像仪对下落过程进行拍摄，后处理软件PCC2.14对图片进行分析．结果表明：自由下落颗粒流由稳定段向过渡段转变时，轴心速度单调递增由过渡段向扩散段转变时，轴心速度先增后减；远离出流口处颗粒流扩散直径与高度之间呈线性规律变化；颗粒流核心直径与扩散直径比随着高度增大而减小，随着出流口径增大而增大，该比值可以定量的分析流态的变化．本研究成果为碰撞过程的研究提供初始条件，进而可预测并控制颗粒的扩散，对散装物料输送过程粉尘的治理及保护工作环境提高工作人员健康水平具有重要的意义．
Abstract:
To illustrate the mechanism of dust emission during the industrial materials transfer process in industrial buildings, experimental investigation on the particle behavior of free falling particle stream collision process was conducted using a high speed camera. The software PCC2.14 was used to analyze the images. Results indicate that the centerline velocity of the particle stream monotonically increased from stable regime to transitive regime, increasing first and then decreasing from the transitive regime to the dispersive regime . The dimensionless dispersive diameter of the stream has a linear relationship to the dime nsionless falling height and the empirical equation is obtained. The ratio between particle stream core diameter and falling disperse diameter decreased as the drop height increas ed, and increased as the drop outlet increased. The ratio could be used to analyze the variation of flow regimes quantitatively. The research provided initial condition for the collide process study. Thus the particle disperse could be predicted and controlled. It is important for improving the working environment condition and managing the dust from the bulk material transport system.

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相似文献/References:

[1]王 怡,樊 航,任晓芬.自由下落非均一粒径颗粒流的流场特性[J].西安建筑科技大学学报(自然科学版),2015,47(03):418.[doi:10.15986/j.1006-7930.2015.03.020]
　WANG Yi,FAN Hang,REN Xiaofen.Flow characteristics of free-fall particles with non-uniform particle diameter[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2015,47(01):418.[doi:10.15986/j.1006-7930.2015.03.020]

备注/Memo

备注/Memo:
收稿日期：2016-03-29 修改稿日期：2016-06-01
基金项目：国家杰出青年基金项目(51425803)；国家自然科学重点项目(51238010)；国家自然科学基金青年基金项目(51608164)
作者简介：任晓芬（1978-），女，博士研究生，讲师，主要从事建筑通风理论及其在实际中的应用研究. Email：renxiaofen01@126.com
更新日期/Last Update: 2017-03-16