定容条件下甲烷-乙炔爆炸及火焰演化特性

doi:10.16265/j.cnki.issn1003-3033.2026.08.0988

中国安全科学学报 ›› 2026, Vol. 36 ›› Issue (8): 65-73.doi: 10.16265/j.cnki.issn1003-3033.2026.08.0988

定容条件下甲烷-乙炔爆炸及火焰演化特性

梁运涛¹^,²(), 白洁琪²^,³, 王琳¹^,², 田富超¹^,²^,^**(), 苏伟伟¹, 赵鹏涛⁴

¹ 煤炭科学研究总院有限公司, 北京 100013
² 中煤科工集团沈阳研究院有限公司煤矿灾害防控全国重点实验室, 辽宁沈抚示范区 113122
³ 大连理工大学能源与动力学院, 辽宁大连 116024
⁴ 湖南省煤炭科学研究院有限公司, 湖南长沙 410004

收稿日期:2026-03-12 修回日期:2026-06-15 出版日期:2026-08-28
通信作者:
**田富超(1984—),男,河南项城人,博士,研究员,博士生导师,主要从事火灾防治、气体光谱分析方面的研究与成果转化工作。E-mail:tianfuchao@cumt.edu.cn。
作者简介:
梁运涛 (1974—),男,河北晋州人,博士,研究员,博士生导师,主要从事工业气体爆炸、火灾防治方面的研究。E-mail:liangyuntao@vip.sina.com。
苏伟伟副研究员
赵鹏涛高级工程师
基金资助:
国家自然科学基金资助(U23B2094); 国家自然科学基金资助(52574306); 国家自然科学基金资助(U25A20274); 辽宁省“兴辽英才计划”科技创新团队项目(XLYC2504009)

Explosion and flame evolution characteristics of methane-acetylene premixed gas under constant volume conditions

Liang Yuntao¹^,²(), Bai Jieqi²^,³, Wang Lin¹^,², Tian Fuchao¹^,²^,^**(), Su Weiwei¹, Zhao Pengtao⁴

¹ Chinese Institute of Coal Science, Beijing 100013, China
² State Key Laboratory of Coal Mine Disaster Prevention and Control, CCTEG Shenyang Research Institute, Shenfu Demonstration Zone Liaoning 113122, China
³ School of Energy and Power Engineering, Dalian University of Technology, Dalian Liaoning 116024, China
⁴ Hunan Coal Scientific Research Institute Co., Ltd., Changsha Hunan 410004, China

Received:2026-03-12 Revised:2026-06-15 Published:2026-08-28

摘要/Abstract

摘要：

为探究甲烷(CH₄)裂解制备乙炔(C₂H₂)过程中混合气体的爆炸风险评估依据,采用20 L球形爆炸压力测试系统,获取小范围掺混工况下该混合气体的爆炸极限并修订经验式;同时用Fluent模拟其在球形压力容器中的爆炸特性,选取乙炔掺混比5%、50%、95%的3种化学计量混合物开展数值模拟。结果表明:测试与数值模拟结论的吻合性较好,阶段Ⅰ和阶段Ⅲ混合气体反应特性与单一组分可燃气体相近,阶段Ⅱ中甲烷与乙炔反应相互耦合、更稳定;容器内气体密度分布与温度云图趋势一致,以火焰锋面为界呈内外密度差异;同一监测点温度变化时间随掺混比增大而提前,各监测点密度呈差异性变化。

关键词: 定容, 甲烷-乙炔, 爆炸极限, 火焰演化, 掺混比, 数值模拟

Abstract:

To investigate the evaluation basis for the explosion risk of mixed gas during the cracking of methane (CH₄) to acetylene (C₂H₂), a 20-L spherical explosion pressure test system was utilized to determine the explosion limits of the mixed gas under low-proportion blending conditions and revise the empirical formula. Simultaneously, Fluent software was employed to simulate the explosion characteristics of the mixed gas in a spherical pressure vessel, and numerical simulations were carried out on three stoichiometric mixtures with acetylene blending ratios of 5%, 50%, and 95%. The results show that the conclusions from experimental tests and numerical simulations are in good agreement. In Stages I and III, the reaction characteristics of the mixed gas are similar to those of single-component combustible gases; in Stage II, the reactions between methane and acetylene are mutually coupled and more stable. The gas density distribution in the container is consistent with the trend of temperature cloud diagrams, showing internal and external density differences bounded by the flame front. The temperature change time at the same monitoring point advances with the increase of the blending ratio, and the density at each monitoring point shows differential changes.

Key words: constant volume, CH₄-C₂H₂, explosion limit, flame evolution, blending ratio, numerical simulation

中图分类号:

X932爆炸安全与防火、防爆

梁运涛, 白洁琪, 王琳, 田富超, 苏伟伟, 赵鹏涛. 定容条件下甲烷-乙炔爆炸及火焰演化特性[J]. 中国安全科学学报, 2026, 36(8): 65-73.

Liang Yuntao, Bai Jieqi, Wang Lin, Tian Fuchao, Su Weiwei, Zhao Pengtao. Explosion and flame evolution characteristics of methane-acetylene premixed gas under constant volume conditions[J]. China Safety Science Journal, 2026, 36(8): 65-73.

图/表 11

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参数	数值
甲烷密度/(kg/m³)	0.717
乙炔密度/(kg/m³)	1.17
壁面比热容/[J/(kg·K)]	480
壁面热导率/[W/(m·K)]	48

R/%	反应容器内各气体体积分数/%
R/%	C₂H₂	CH₄	Air
5	0.47	8.93	90.6
50	4.27	4.27	91.46
95	7.43	0.39	92.18

定容条件下甲烷-乙炔爆炸及火焰演化特性

Explosion and flame evolution characteristics of methane-acetylene premixed gas under constant volume conditions

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