Investigation of the Effects of Hydrogen Addition on Explosion Characteristics and Pressure Fluctuations of Ethyl Acetate

Ce Liang, Xiaolu Li (), Cangsu Xu (), Francis Oppong, Yangan Bao, Yuan Chen, Yuntang Li, Bingqing Wang and Jiangqin Ge
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Ce Liang: College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China
Xiaolu Li: College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China
Cangsu Xu: College of Energy Engineering, Zhejiang University, Hangzhou 310027, China
Francis Oppong: College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China
Yangan Bao: College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China
Yuan Chen: College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China
Yuntang Li: College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China
Bingqing Wang: College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China
Jiangqin Ge: College of Mechanical and Electrical Engineering, China Jiliang University, Hangzhou 310018, China

Energies, 2024, vol. 17, issue 23, 1-23

Abstract: This study systematically explored the characteristics of explosion and pressure fluctuations of ethyl acetate (EA)/hydrogen (H 2 )/air mixtures under different initial pressures (1–3 bar), H 2 fractions (4%, 8%, 12%), and equivalence ratios of EA (0.5–1.4). The flame images indicated that a higher pressure, a higher H 2 fraction, and a higher equivalence ratio could cause flame instability. An analysis of the dimensionless growth rate indicated that the flame instability was impacted by both thermal diffusion and hydrodynamic effects. The results also indicated that a higher initial pressure or H 2 fraction could accelerate the combustion reaction and increase the explosion pressure and deflagration index. The maximum values were observed at 21.841 bar and 184.153 bar·m/s. However, their effects on explosion duration and heat release characteristics differed between lean and rich mixtures. Additionally, this study examined pressure fluctuations in both the time and frequency domains. The findings indicated a strong correlation between pressure fluctuation and flame instability. Modifying the H 2 fraction and equivalence ratio to enhance flame stability proved effective in reducing pressure fluctuation amplitude. This study offers guidance for evaluating explosion risks associated with EA/H 2 /air mixtures and for designing related combustion devices.

Keywords: ethyl acetate (EA); hydrogen addition; explosion characteristics; flame instability; pressure fluctuations; deflagration index (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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