Although methanation is an effective means of achieving carbon neutrality in natural gas engines, at present it is important to reduce CO2 emissions by mixing hydrogen with fossil-derived natural gas. Adding hydrogen improves flame propagation speed, which is expected to improve combustion efficiency and reduce carbon emissions. However, it is necessary to evaluate in detail the effects on ignition characteristics and combustion stability. Among these, laminar combustion velocity is one of the key indicators for understanding the characteristics of mixed combustion. Since laminar combustion velocity is influenced by fuel composition, unburned pressure, and temperature, a detailed analysis using numerical simulation is indispensable to understand the fuel characteristics of hydrogen-natural gas mixed combustion.
MATSUMAE et al. (Wed,) studied this question.