[1]高娜①,胡毅亭①,张延松②.初始温度对甲烷-空气爆炸压力影响的试验研究[J].爆破器材,2016,45(03):26-30.[doi:10.3969/j.issn.1001-8352.2016.03.006]
　GAO Na,HU Yiting,ZHANG Yansong.Experimental Research on Methane-air Mixtures Explosion Pressure under Normal and Elevated Initial Temperatures[J].EXPLOSIVE MATERIALS,2016,45(03):26-30.[doi:10.3969/j.issn.1001-8352.2016.03.006]
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初始温度对甲烷-空气爆炸压力影响的试验研究()
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《爆破器材》[ISSN:1001-8352/CN:32-1163/TJ]

卷:
45
期数:
2016年03
页码:
26-30
栏目:
基础理论
出版日期:
2016-05-13

文章信息/Info

Title:
Experimental Research on Methane-air Mixtures Explosion Pressure under Normal and Elevated Initial Temperatures
文章编号:
5041
作者:
高娜①; 胡毅亭①; 张延松②
①南京理工大学化工学院（江苏南京，210094） 
②中煤科工集团重庆研究院有限公司（重庆，400037）
Author(s):
GAO Na①;  HU Yiting①;  ZHANG Yansong②
①School of Chemical Engineering, Nanjing University of Science & Technology (Jiangsu Nanjing, 210094)
②Chongqing Research Institute of China Coal Technology & Engineering Group Corporation(Chongqing,400037)
关键词:
初始温度; 甲烷-空气; 最大爆炸压力; 压力上升速率; 最大压力到达时间
Keywords:
initial temperature;  methane-air mixtures;  the maximum explosion pressure;  rising rate of explosion pressure;  reach time of the maximum explosion pressure
分类号:
TD712；X932
DOI:
10.3969/j.issn.1001-8352.2016.03.006
文献标志码:
A
摘要:
借助特殊环境20 L爆炸特性测试系统，研究了初始温度对甲烷-空气爆炸压力的影响，初始压力为0.1 MPa，初始温度变化范围为298~473 K。结果表明，甲烷-空气爆炸的最大爆炸压力随初始温度的升高而降低，初始温度由298 K升高到473 K，最大爆炸压力由0.783 3 MPa下降到0.501 2 MPa，下降幅度为35.89%。初始温度的升高加快了反应速率，缩短了最大爆炸压力到达时间，由298 K时的127.1 ms缩短到473 K时的85.0 ms。初始温度升高，甲烷-空气最大爆炸压力的上升速率(dp/dt)max呈上升趋势。当初始温度由298 K上升至473 K时，(dp/dt)max升幅并不大，仅为9.16%；爆炸特征值KG不断增大，其爆炸危险性也随之增大。从反应开始到到达最大爆炸压力这段时间内，爆炸压力上升速率的变化在一定程度上可以反映甲烷-空气爆炸反应速率的变化情况。
Abstract:
The influence of initial temperature on the explosion pressure of methaneair mixtures was experimentally investigated at different initial temperature from 298 K to 473 K under the constant initial pressure of 0.1 MPa. Experiments were performed in a closed spherical 20 L vessel with the ignition electrode at the center, which could heat the experimental gas. The results show that the maximum explosion pressure of methane-air mixtures decreases along with the rise of initial temperature. When the initial temperature increases from 298 K to 473 K, the maximum explosion pressure drops from 0.783 3 MPa to 0.501 2 MPa, decreased by 35.89%. Higher initial temperature accelerates the reaction rate, so the reach time of the maximum explosion pressure is shortened from 127.1 ms at 298 K to 85.0 ms at 473 K. In the experimental temperature range, the maximum pressure rise rate (dp/dt)max increases at elevated initial temperature, but the increase is not large, which is only 9.16%. So the explosion eigen value KG also increases. During the period from the beginning of the reaction to the time reaching the maximum pressure, the rising rate of explosion pressure, to a certain extent, can reflect the change of the methaneair explosion reaction rate.

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备注/Memo

备注/Memo:
收稿日期：2015-11-16
作者简介：高娜(1986－),女，博士，主要从事气体爆炸方面的研究。E-mail:gaona_mxd@163.com
更新日期/Last Update: 2016-05-13