Numerical Investigation of the Ignition Delay Time of Kerosene Premixed Combustion in an SI Engine

Yuxuan Zhao, Enhua Wang and Zhicheng Shi
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Yuxuan Zhao: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Enhua Wang: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Zhicheng Shi: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China

Energies, 2022, vol. 15, issue 5, 1-15

Abstract: SI engines are installed widely in small aircrafts as they have good fuel economy. Currently, these SI engines are fueled with gasoline, although their safety can be improved if kerosene is used. However, the combustion performance of kerosene cannot fulfil the requirements due to the differences in physicochemical properties. This study investigates the ignition delay time of kerosene at a pressure range of 15–35 bar and a temperature range of 600–1000 K. A detailed chemical reaction mechanism is employed for the premixed combustion process. Under the initial conditions of 1000 K and 35 bar, with an equivalence ratio of 1, the total ignition delay time of kerosene is 0.401 ms. The NTC range of kerosene is determined as roughly 750–920 K. Subsequently, the chemical reaction paths with an equivalence ratio of 0.8, 1, and 1.2 and an initial pressure of 15, 20, and 25 bar were analyzed. The rate-determined elementary reactions were obtained based on a sensitivity analysis. The difference between kerosene and gasoline are also compared, and the rate-determining reactions that affect the ignition of kerosene and gasoline are discussed. The results of this study can provide a reference for the combustion performance improvement and knock suppression of SI engines fueled with kerosene.

Keywords: kerosene; ignition delay time; SI engine; premixed combustion; chemical reaction path (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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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