On quenching characteristics of combustible premixed gas through a crimped-ribbon flame arrester at different initial pressures

ZHANG Lianzhuo; YAN Xingqing; LYU Xianshu; YU Jianliang; LI Tongzheng; ZHAN Xiaobing

doi:10.11883/bzycj-2021-4058

Volume 43 Issue 1

Jan. 2023

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ZHANG Lianzhuo, YAN Xingqing, LYU Xianshu, YU Jianliang, LI Tongzheng, ZHAN Xiaobing. On quenching characteristics of combustible premixed gas through a crimped-ribbon flame arrester at different initial pressures[J]. Explosion And Shock Waves, 2023, 43(1): 012202. doi: 10.11883/bzycj-2021-4058

Citation:

ZHANG Lianzhuo, YAN Xingqing, LYU Xianshu, YU Jianliang, LI Tongzheng, ZHAN Xiaobing. On quenching characteristics of combustible premixed gas through a crimped-ribbon flame arrester at different initial pressures[J]. Explosion And Shock Waves, 2023, 43(1): 012202. doi: 10.11883/bzycj-2021-4058

Citation:

ZHANG Lianzhuo, YAN Xingqing, LYU Xianshu, YU Jianliang, LI Tongzheng, ZHAN Xiaobing. On quenching characteristics of combustible premixed gas through a crimped-ribbon flame arrester at different initial pressures[J]. Explosion And Shock Waves, 2023, 43(1): 012202. doi: 10.11883/bzycj-2021-4058

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On quenching characteristics of combustible premixed gas through a crimped-ribbon flame arrester at different initial pressures

doi: 10.11883/bzycj-2021-4058

School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

Received Date: 2021-11-08
Accepted Date: 2022-11-14
Rev Recd Date: 2022-04-07

Available Online: 2022-11-16

Publish Date: 2023-01-05

Abstract

Abstract

The crimped flame arrester is a common disaster prevention and control device. Most of the research focuses on the higher-pressure working conditions instead of the pressure lower than 0.1 MPa when it applies in special areas or environments. This paper explores the quenching characteristics of different combustible gas-air mixtures passing through crimped ribbon flame arresters at different initial pressures to replenish the low-pressure protection test and understand the factors affecting the performance of the flame arrester deeply. The experiments were carried out in the DN80 circular pipe. And the crimped ribbon plate slit channel with a cross-section of an approximately equilateral triangle is 38 mm long and 0.8 mm high. The experimental gases are premixed propane-air with a volume fraction of 4.2% and premixed ethylene-air with different concentrations obtained according to the partial pressure method. The ignition voltage is 10 kV. It is found that the activity, concentration, and initial pressure of combustible gas will affect the stability of flame velocity, propagation mode, and quenching difficulty. The results show that there are three modes of flame propagation: direct quenching, quenching after passing through the flame retardant unit, and quenching failure. They can be explained as the flame not passing through the slits, the flame passing through the slits but being extinguished before reaching the pipe end, and the flame keeps spreading until the pipe end. Also, the velocity oscillation occurs on the unprotected side of the pipeline, and the velocity rises incredibly when the quenching failed flame passes through the protected side. The formula of deflagration flame quenching velocity of premixed propane-air in a closed pipe was established based on the heat transfer effect and verified by the quenching experiment of premixed gas with a volume fraction of 4.2%. The maximum initial pressure is defined as the limit pressure that quenching would fail at initial pressure higher than it. It is proposed to use the limit pressure to characterize the degree of quenching difficulty. It is worth remarking that quenching is the most difficult at stoichiometric concentration, where the limit pressure is the smallest, and the limit pressure will remain constant within a certain concentration range.
- crimped-ribbon flame arrester,
- premixed flame,
- quenching,
- initial pressure,
- flame speed

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References(16)

References

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