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[1]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):65-70.[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):65-70.[doi:10.11731/j.issn.1673-193x.2021.03.010]
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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*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
17
期数:
2021年3期
页码:
65-70
栏目:
职业安全卫生管理与技术
出版日期:
2021-03-31

文章信息/Info

Title:
Experimental and simulation research on thermal properties of loose coal with different moisture contents based on hot wire method
文章编号:
1673-193X(2021)-03-0065-06
作者:
曲国娜; 贾廷贵; 娄和壮; 强倩; 郝宇
(1.内蒙古科技大学 矿业与煤炭学院，内蒙古 包头 014010；
2.北京城市排水集团有限责任公司，北京 100000；3.重庆工程职业技术学院，重庆 402260)
Author(s):
QU Guona;  JIA Tinggui;  LOU Hezhuang;  QIANG Qian;  HAO Yu
(1.Institute of Mining and Coal,Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010,China;
2.Beijing Drainage Group Co.,Ltd.,Beijing 100000,China;
3.Chongqing Vocational Institute of Engineering,Chongqing 402260,China)
关键词:
松散煤体; 热物性; 热线法; 导热系数; 水分含量
Keywords:
loose coal;  thermo-physical property;  hot wire method;  thermal conductivity;  moisture content
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2021.03.010
文献标志码:
A
摘要:
为解决松散煤体热物性参数的测试周期长与实验误差大等问题，构建测试装置实验平台，结合交叉热线法和平行热线法，对松散煤体热物性参数进行准确测量与计算，对1～2 mm，0.5～0.6 mm和0.2～0.3 mm 3种不同粒径煤样在不同水分含量下的热物性参数的变化规律进行研究，利用Fluent数值模拟软件对松散煤体温度场进行模拟研究，并对比模拟结果与实验结果的差异性。结果表明：在所测粒径范围里，同等水分含量下的松散煤体粒径越大，导热系数越小，热扩散率与比热容越大；松散煤体的导热系数随水分含量的增加而增加，但增加趋势渐缓；松散煤体的热扩散率随着水分含量的增加而增大，当水分含量达到11.73～13.88%后热扩散率开始逐渐下降，而比热容随着水分含量的增加逐渐增大。
Abstract:
Aiming at the shortcomings of long test period and large experimental error for the thermo-physical property parameters of loose coal,an experimental platform of testing device was constructed,and combined with the cross hot wire method and parallel hot wire method,the thermo-physical property parameters of loose coal were accurately measured and calculated.The variation laws of thermo-physical property parameters of three coal samples with different particle sizes of 1~2 mm,0.5~0.6 mm and 0.2~0.3 mm under different moisture contents were studied.The Fluent numerical simulation software was used to simulate the temperature field of loose coal,and the difference between simulation results and experimental results was compared.The results showed that in the range of measured particle sizes,the larger the particle size of loose coal under the same moisture content,the smaller the thermal conductivity,and the larger the thermal diffusivity and specific heat capacity.The thermal conductivity of loose coal increased with the increase of moisture content,but the increasing trend gradually slowed down.The thermal diffusivity of loose coal increased with the increase of moisture content.When the moisture content reached 11.73~13.88%,the thermal diffusivity gradually decreased,and the specific heat capacity gradually increased with the increase of moisture content.

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相似文献/References:

[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.
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[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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备注/Memo

备注/Memo:
收稿日期： 2020-08-09；网络首发日期： 2021-03-15
* 基金项目： 国家重点研究计划项目（2017YFC1503100)；内蒙古自治区自然科学基金项目（2020MS05010）；内蒙古自治区高等学校科学研究项目（NJZZ21025）
作者简介： 曲国娜，博士，讲师，主要研究方向为矿井火灾防治理论及技术。
通信作者： 贾廷贵，硕士，副教授，主要研究方向为矿井通风与防灭火理论及技术。
更新日期/Last Update: 2021-04-13