Auto-ignition characteristics of high-reactivity gasoline fuel using a gasoline multi-hole injector

Du, Jianguo; Mohan, Balaji; Sim, Jaeheon; Fang, Tiegang; Roberts, William L.

doi:10.1016/j.expthermflusci.2019.109993

Cited by 5 publications

(1 citation statement)

References 30 publications

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“…To analyze the combustion kinetics during the combustion process, four important combustion periods were selected, including CA1, CA5, CA10, and CA50 timing, corresponding to the ignition timing, initial combustion period, premixed-combustion period, and mixing-controlled combustion period, respectively. The ignition timing and initial combustion phase is essential to the combustion process. − The premixed-combustion and mixing-controlled-combustion periods are the main combustion process, which is essential to the control of engine power output.…”

Section: Results and Discussionmentioning

confidence: 99%

Investigation of the Combustion Kinetics Process in a High-Pressure Direct Injection Natural Gas Marine Engine

Liu

et al. 2021

Energy Fuels

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The detailed combustion kinetic processes of a high-pressure direct injection (HPDI) natural gas (NG) marine engine was investigated in the present work. A postprocessing code was employed to visualize the characteristic reactions that determine the combustion process. To evaluate the effect of mixture stratification on the combustion process, various NG injection timings were employed and four representative combustion periods were selected, including the timings when 1% (CA1), 5% (CA5), 10% (CA10), and 50% (CA50) of the total fuel energy are released. A higher heat release rate (HRR) was generated with a more advanced NG start of injection (SOI) timing, which, however, had limited effects on the main representative exothermic reactions (REXRs) within the high heat release (HHR) region and the dominant formation reactions of CH 2 O and OH, which are known as the indicators of low heat release (LHR) and HHR, respectively. Besides, for different NG SOI timing simulation, the consumption of CH 4 was all dominated by reactions H + CH 4 = CH 3 + H 2 and OH + CH 4 = CH 3 + H 2 O and the dominated REXR of the LHR region was reaction CH 3 + O 2 = CH 3 O 2 . Furthermore, with an advanced NG injection timing, significant changes were observed for the reaction paths of CH 2 , CH 2 O, and HCO from the premixed-combustion phase (CA10) to the mixing-controlled combustion phase (CA50). The results of the present study are able to provide a theoretical fundamental for the practical control of the HPDI NG marine engine.

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Section: Results and Discussionmentioning

confidence: 99%