个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 教育部安全科学与工程类教学指导委员会 副主任委员
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:化工学院
办公地点:大连理工大学化工学院化工机械与安全系H楼419
联系方式:0411-84986600
电子邮箱:bimsh@dlut.edu.cn
Theoretical pressure prediction of confined hydrogen explosion considering flame instabilities
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论文类型:期刊论文
发表时间:2019-01-01
发表刊物:JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
收录刊物:SCIE
卷号:57
页面范围:320-326
ISSN号:0950-4230
关键字:Explosion pressure behavior; Flame instabilities; Flame wrinkling factor; Adiabatic compression; Isothermal condition
摘要:In order to ensure the safe utilization of hydrogen energy, the explosion pressure behavior is extremely important to design chemical equipment and evaluate explosion accident consequence. This paper is aimed at establishing a theoretical method of predicting explosion pressure behavior in the confined chamber by considering flame instabilities. The tendency of flame wrinkling factor in the pressure-buildup stage is firstly evaluated using large eddy simulation and the compensation theory. The limiting value of flame wrinkling factor during entire explosion process is calculated using the fractal theory. Finally, the dynamic model of flame wrinkling factor is implemented into the smooth flame model. The results demonstrated that the flame wrinkling factor in the pressure-buildup stage almost increases linearly with time. The limiting value of flame wrinkling factor is 2.4649. The explosion pressure will be underestimated using the smooth flame model, and the calculated explosion pressure in the isothermal condition is smaller than that in the adiabatic condition. When the fully turbulent flame is considered, the explosion pressure will be overpredicted significantly. By changing the confined chamber size, the explosion pressure could be reproduced relatively satisfactorily when the flame wrinkling factor is assumed to increase exponentially. The explosion pressure prediction must consider the effect of adiabatic compression and flame instabilities on burning rate.