CFD Investigation of Hydrogen Combustion in Swirler Combustor

Abstract

A CFD model which is accompanied with detailed chemistry and has been firstly validated with experimental data achieved from a HSDI (High Speed Direct Injection) diesel engine has been applied to analyze the effects of intake oxygen temperature on engine performance characteristics under oxyfuel combustion condition. The simulation has been carried out at five different intake charge temperatures (140°C, 160°C, 180°C, 200°C, and 220°C). It was found that the implementation of oxyfuel HCCI combustion must be accompanied by an accurate intake temperature adjustment. Increasing intake charge temperature results in advancing the start of combustion along with a shorter main combustion stage which results in a reduction of IMEP and an increase of ISFC while decreasing intake charge temperature affects the combustion stability and leads to incomplete combustion.