Numerical Study on the Design of a Passive Pre-Chamber for a Heavy-Duty Hydrogen Combustion Engine Eindhoven University of Technology

Format:

Book

Conference/Event

Author/Creator:

Maas, Ralph, author.

Contributor:

Bekdemir, Cemil

Somers, Bart

Conference Name:

WCX SAE World Congress Experience (2024-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2024

Summary:

Lean-burn hydrogen internal combustion engines are a good option for future transportation solutions since they do not emit carbon-dioxide and unburned hydro-carbons, and the emissions of nitric-oxides (NOx) can be kept low. However, under lean-burn conditions the combustion duration increases, and the combustion stability decreases, leading to a reduced thermal efficiency. Turbulent jet ignition (TJI) can be used to extend the lean-burn limit, while decreasing the combustion duration and improving combustion stability. The objective of this paper is to investigate the feasibility of a passive pre-chamber TJI system on a heavy-duty hydrogen engine under lean-burn conditions using CFD modelling. The studied concept is mono-fuel, port-fuel injected, and spark ignited in the pre-chamber. The overall design of the pre-chamber is discussed and the effect of design parameters on the engine performance are studied. From this analysis, it was found that the volume of the pre-chamber and the area of the pre-chamber holes have major impact on the performance of the pre-chamber. Next, the difference between a regular spark-ignited combustion and a TJI system are investigated at a medium load point. The combustion duration is shortened significantly using a passive pre-chamber. However, the heat transfer loss through the walls increased significantly due to prolonged higher temperatures and higher turbulence near the combustion chamber walls. Finally, the air-fuel ratio is increased to study its effect on the heat transfer loss and NOx emissions

Notes:

Vendor supplied data

Publisher Number:

2024-01-2112

Access Restriction:

Restricted for use by site license