Home Journals Articles Updates About
CN
image
收藏切换
Effect of Length-to-diameter Ratio on Overpressure Characteristics of Methane/Air Premixed Explosions
收藏切换
PDF
Jian-hua CHENG1, 2, Wen-wen BAO1, Xiao-lin YANG1, 2, Shuai-dong DING3, Ying-kang WENG1, Zi-jun ZHANG1
Blasting | 2025, 42(2) : 13 - 21
Less
收藏切换
Blasting | 2025, 42(2): 13-21
• THEORETICAL AND TECHNOLOGICAL EXPLORATION •
Effect of Length-to-diameter Ratio on Overpressure Characteristics of Methane/Air Premixed Explosions
Full
Jian-hua CHENG1, 2, Wen-wen BAO1, Xiao-lin YANG1, 2, Shuai-dong DING3, Ying-kang WENG1, Zi-jun ZHANG1
Affiliations
  • 1.School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China
  • 2.International Joint Research Laboratory of Henan Province for Underground Space Development and Disaster Prevention, Jiaozuo 454003, China
  • 3.China Railway 16th Bureau Group Co., Ltd., Beijing 100000, China
Published: 2025-06-01 doi: 10.3963/j.issn.1001-487X.2025.02.002
Outline
收藏切换

To explore the influence of ignition position change on overpressure characteristics of methane/air premixed explosion under different equivalence ratios, several tests with varying length-to-diameter and equivalence ratios on the rise rate of peak overpressure and positive pressure duration were carried out through a self-built explosion test system. The main influencing factors affecting the pressurization characteristics of methane/air premixed explosion were analyzed by the dimensional analysis method, and the calculation formulas of rise rate of overpressure peak and positive pressure during methane/air premixed explosion were proposed. The results show that the rise rate of the overpressure peak increases with the increase of the equivalence ratio, and the increase in length-to-diameter ratio makes the rise rate decrease gradually, which is different from the attenuation rate. The positive pressure duration is gradually prolonged with the rise of the length-to-diameter ratio. However, the maximum positive pressure duration corresponds to different equivalence ratios with the length-to-diameter ratio changes. Furthermore, the calculation formulas of the rise rate of overpressure peak and positive pressure duration of methane/air premixed explosion are obtained by the dimensional analysis method, and the feasibility of the formulas is verified by comparing the experimental values with the theoretical values. It was found that methane/air premixed explosion is significantly affected by the ignition position and equivalence ratio, which can provide a reference for the power evaluation and safety control of methane explosions.

rise rate of overpressure peak  /  positive pressure duration  /  length-to-diameter ratio  /  methane-air premixed  /  dimensional analysis
Jian-hua CHENG, Wen-wen BAO, Xiao-lin YANG, Shuai-dong DING, Ying-kang WENG, Zi-jun ZHANG. Effect of Length-to-diameter Ratio on Overpressure Characteristics of Methane/Air Premixed Explosions[J]. Blasting, 2025 , 42 (2) : 13 -21 . DOI: 10.3963/j.issn.1001-487X.2025.02.002
Funding
Less
  • National Key Project of China(U23A20600)
  • Enterprises Commission Large-scale Scientific Research Project(H22-541)
Appendix
Less
Year 2025 volume 42 Issue 2
PDF
111
52
Cite this Article
BibTeX
Article Info
doi: 10.3963/j.issn.1001-487X.2025.02.002
  • Receive Date：2024-09-24
  • Online Date：2026-03-19
  • Published：2025-06-01
Article Data
Affiliations
History
  • Received：2024-09-24
Funding
National Key Project of China(U23A20600)
Enterprises Commission Large-scale Scientific Research Project(H22-541)
Affiliations
    1.School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China
    2.International Joint Research Laboratory of Henan Province for Underground Space Development and Disaster Prevention, Jiaozuo 454003, China
    3.China Railway 16th Bureau Group Co., Ltd., Beijing 100000, China

Corresponding:

BAO Wen-wen (2001-), female, born in Anyang city, Henan province, Postgraduate student, mainly engaged in security technology research, (E-mail).
References
Share
https://castjournals.cast.org.cn/joweb/bp/EN/10.3963/j.issn.1001-487X.2025.02.002
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62199257
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House