Investigate Chemical Effects of Pre-chamber Combustion Products on Main Chamber Combustion under an Ultra-lean Condition Kaust

Format:

Book

Conference/Event

Author/Creator:

TANG, WENXIAN, author.

Contributor:

Sarathy, Mani

Conference Name:

SAE Powertrains, Fuels & Lubricants Meeting (2020-09-22 : Krakow, Poland)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2020

Summary:

Pre-chamber ignition systems are considered as an effective technique to achieve an ultra-lean burn combustion. Hot combustion products and flames generated from the pre-chamber combustion create high-speed turbulent jets, which ignite an ultra-lean mixture in the main chamber. This turbulent ignition can be classified as jet and flame ignition process considering the thermal and chemical kinetic effects imposed from the pre-chamber. The purpose of this paper is to investigate the chemical effects of pre-chamber combustion products on the main chamber ignition performance over a range of operating conditions in pre-chamber. A zero-dimensional pre-chamber combustion model is developed using ChemkinPro software. By varying the equivalence ratio of reactants, the simulations indicate that pre-chamber generated more active species when burning around stoichiometric conditions but more low-carbon species when burning in rich conditions. Therefore, rapid ignition performance is observed in the ultra-lean combustion of the main chamber with combustion products from burning stoichiometric in the pre-chamber, which is contributed to the transfer of highly reactive species from the pre-chamber into the main chamber. Heat release rate and laminar flame speed of the main chamber combustion are improved with combustion products from burning richer in the pre-chamber. The micro-mixing problem of burned products from the pre-chamber and fresh gas mixture in the main chamber is also studied, and important reactions are analyzed by flux and sensitivity analysis

Notes:

Vendor supplied data

Publisher Number:

2020-01-2001

Access Restriction:

Restricted for use by site license