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[1]陈清华,周保杰,秦汝祥.含内热源松散煤体热湿迁移特性研究*[J].中国安全生产科学技术,2023,19(3):79-86.[doi:10.11731/j.issn.1673-193x.2023.03.012]
　CHEN Qinghua,ZHOU Baojie,QIN Ruxiang.Study on heat and moisture migration characteristics of loose coal with internal heat source[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(3):79-86.[doi:10.11731/j.issn.1673-193x.2023.03.012]
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含内热源松散煤体热湿迁移特性研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
19
期数:
2023年3期
页码:
79-86
栏目:
职业安全卫生管理与技术
出版日期:
2023-03-31

文章信息/Info

Title:
Study on heat and moisture migration characteristics of loose coal with internal heat source
文章编号:
1673-193X(2023)-03-0079-08
作者:
陈清华; 周保杰; 秦汝祥
（1.安徽理工大学 机械工程学院，安徽 淮南 232001；
2.安徽理工大学 煤炭安全精准开采国家地方联合工程研究中心，安徽 淮南 232001；
3.安徽理工大学 安全科学与工程学院，安徽 淮南 232001）
Author(s):
CHEN Qinghua;  ZHOU Baojie;  QIN Ruxiang
(1.School of Mechanical Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China;
2.Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining (Anhui University of Science and Technology),Huainan Anhui 232001,China；
3.School of Safety Science of Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China)
关键词:
松散煤体; 多场; 相变; 热力驱动; 热湿迁移特性
Keywords:
loose coal;  multi-field;  phase transition;  thermal driving;  heat and moisture migration characteristics
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2023.03.012
文献标志码:
A
摘要:
为研究松散煤体内部热湿迁移规律，建立松散煤体多场-相变-扩散耦合数学模型，对热力驱动下的温、湿度场时空演变规律进行仿真研究；通过热湿迁移特性实验平台，对数值模拟结果的有效性与准确性进行验证。研究结果表明：温度相对误差小于5%，含湿量相对误差小于8%；松散煤体温度逐渐升高，温升速率逐渐减小，温度最终趋于稳定值，沿轴线方向温度呈指数性降低；松散煤体湿度场可分为煤体含水率和空气含湿量，在空间上可分为含水率减少区、含水率增大区和含水率不变区，随着计算进行，峰值含水率逐渐增大且向远离热源方向移动；含湿量相较于实验初期均有所增大，沿轴线方向先呈线性降低，后呈指数性降低且线性区域越来越大，指数性区域越来越小。
Abstract:
In order to study the law of heat and moisture migration inside loose coal,a multi-field,phase transition and diffusion coupled mathematical model of loose coal was established,and the simulation research was carried out on the temporal and spatial evolution law of temperature and humidity fields under thermal driving.The validity and accuracy of the numerical simulation results were verified by the experimental platform of heat and moisture migration characteristics.The results showed that the relative error of temperature was less than 5% and the relative error of moisture content was less than 8%.The temperature of loose coal increased gradually and finally remained unchanged,the temperature rise rate decreased gradually,and the temperature decreased exponentially along the axial direction.The moisture field of loose coal could be divided into coal moisture content and air moisture content,and the moisture content could be divided into reducing area,increasing area and constant area in space.With the progressing of calculation,the peak moisture content gradually increased and moved away from the heat source.The moisture content increased comparing to the initial stage of the experiment,which first decreased linearly along the axis direction,then decreased exponentially,and the linear region was growing,while the exponential region was getting smaller.

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[1]王长安,王勃,李夏青,等.松散煤体表面温度与热源温度对应关系的热红外实验研究[J].中国安全生产科学技术,2011,7(8):38.
　WANG Chang-an,WANG bo,LI Xia-qing,et al.Thermal infrared experimental study of the corresponding relationship between loose coal surface temperature and heat source temperature[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2011,7(3):38.
[2]孙越,李增华,高思源,等.瞬态径向热流法测定松散煤体变导热系数[J].中国安全生产科学技术,2012,8(1):42.
　SUN Yue,LI Zeng-hua,GAO Si-yuan,et al.Measurement of changing thermal conductivity of loose coal with transient radial heat flow method[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2012,8(3):42.
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　QIN Ruxiang,LIU Yarui,XU Tongzhen,et al.Development of test device for seepage heat transfer of loose coal[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(3):51.[doi:10.11731/j.issn.1673-193x.2019.07.008]
[5]曲国娜,贾廷贵,娄和壮,等.基于热线法的不同水分含量松散煤体热物性实验与模拟研究*[J].中国安全生产科学技术,2021,17(3):65.[doi:10.11731/j.issn.1673-193x.2021.03.010]
　QU Guona,JIA Tinggui,LOU Hezhuang,et al.Experimental and simulation research on thermal properties of loose coal with different moisture contents based on hot wire method[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(3):65.[doi:10.11731/j.issn.1673-193x.2021.03.010]

备注/Memo

备注/Memo:
收稿日期： 2022-11-29
* 基金项目： 国家自然科学基金项目(51874007)；煤炭安全精准开采国家地方联合工程研究中心开放基金项目（EC2021019）
作者简介： 陈清华，博士，教授，主要研究方向为传热传质学、材料热物性。
通信作者： 秦汝祥，博士，教授，主要研究方向为矿井通风防灭火技术。
更新日期/Last Update: 2023-04-12