The Influence of Ignition Position on the Combustion Characteristics of Jet Ignition Engines
Jet ignition can effectively improve engine combustion efficiency and suppress knock.The ignition position of the spark plug in the pre-chamber has a significant impact on the ignition success rate and combustion effect.Using CFD simulation method,the influence of the ignition position of the spark plug in the pre-chamber of a passive jet ignition engine on the combustion process in the engine cylinder was studied.The following con-clusions were obtained:appropriately placing the ignition position of the spark plug in the pre-chamber close to the nozzle can achieve accelerated flame propagation with the help of high turbulent kinetic energy gas;Under the action of airflow,the flame first propagates towards the end of the pre-chamber,which can reduce the un-burned mixture that flows back from the pre-chamber to the main combustion chamber before high-temperature gas injection,and increase the cumulative heat release of the mixture in the pre-chamber.The maximum cumula-tive heat release rate of the combustible mixture in the pre-chamber can be increased by 14.9％.
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万方数据
维普
