Analysis of the Ignition Behavior Based on Similarity Factor Method

Weiwei Fan, Shengxiong Yang, Ke Xu, Mingdong Zhu and Jie Xu
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Weiwei Fan: Henan Institute of Technology, Xinxiang 453003, China
Shengxiong Yang: Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511400, China
Ke Xu: Henan Institute of Technology, Xinxiang 453003, China
Mingdong Zhu: Henan Institute of Technology, Xinxiang 453003, China
Jie Xu: Henan Institute of Technology, Xinxiang 453003, China

Energies, 2021, vol. 14, issue 4, 1-14

Abstract: The chemical kinetics mechanism is an important factor to accurately predict the combustion characteristics of constant-volume bomb (CVB). In this study, an n-heptane oxidation mechanism constructed by Wang et al. is introduced to study the correlation of the ignition behaviors with the mechanism constructed by Chang et al. The effects of the similarity factor method in the analysis of ignition behaviors of fuel in CVB were repeatedly verified by changing the important spraying parameters: injection pressure and hole diameter. Through further verification, it was found that the combustion process was controlled at approximately 850 K and stoichiometric ratio mixture of fuel/air in CVB, which corresponds to the negative temperature coefficient region at stoichiometric ratio mixture in shock tube (ST). The mechanism verified by the experiment under the condition in ST can reflect the chemical ignition in CVB. In addition, the similarity factor method was less dependent on the chemical reaction mechanism and boundary conditions.

Keywords: similarity factor method; ignition characteristics; chemical reaction kinetic mechanism; constant volume bomb (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: 2021
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