Analysis of the combustion speed in a spark ignition engine fuelled with hydrogen and gasoline blends at different air fuel ratios

作者：Pedro Gabana, B. Giménez, J.M. Herreros, A. Tsolakis · 发表于：Fuel · 年份：2024 · DOI：10.1016/j.fuel.2024.133563 · 被引用次数：12 · 研究领域：Advanced Combustion Engine Technologies、Combustion and flame dynamics、Engine and Fuel Emissions

• A geometric model to determine combustion speed in spark ignition engines is developed. • The combustion properties and flame characteristics have been studied. • A combustion speed predictive correlation accounting for fuel properties and engine conditions is proposed. • The impact of H 2 on combustion speed for H 2 -gasoline fuel is understood. The use of hydrogen in internal combustion engines is a promising solution for the decarbonisation of the transport sector. The current transition scenario is marked by the unavailability and storage challenges of hydrogen. Dual fuel combustion of hydrogen and gasoline in current spark ignition engines is a feasible solution in the short and medium term as it can improve engine efficiency, reduce pollutant emissions and contribute significantly in tank to wheel decarbonisation without major engine modification. However, new research is needed to understand how the incorporation of hydrogen affects existing engines to effectively implement gasoline-hydrogen dual fuel option. Understanding the impact of hydrogen on the combustion process (e.g. combustion speed) will guide and optimize the operation of engines under dual fuel combustion conditions. In this work, a commercial gasoline direct injection engine has been modified to operate with gasoline-hydrogen fuels. The experiments have been carried out at various air–fuel ratios ranging from stoichiometric to lean combustion conditions at constant engine speed and torque. At each one ...