Study on the effect of hydrogen addition on ignition and combustion of prechamber ignition system

Abstract

The gas engine for the cogeneration system realizes lean combustion by using prechamber ignition. The fuel properties of natural gas are quantified as methane value, and a small amount of H2 and C2-C4 hydrocarbon fuels affect ignition and combustion. Since the reaction rate of hydrogen fuel is known to be faster than that of hydrocarbon fuel, even a small amount of hydrogen fuel can have an effect on combustion. Therefore, in this study, experiments were conducted with hydrogen added to methane using RCEM, which is an experimental apparatus similar to a real machine, to compare the ignition and combustion properties for each amount of hydrogen added. As a result, it was found that the ignition delay time can be predicted by a zero-dimensional calculation, and the jet velocity can be predicted by a one-dimensional calculation, which can be an important finding for the guideline of prechamber design.

Keywords

• combustion
• prechamber ignition
• hydrogen addition