火花点火における単一および混合燃料の簡略化モデルの構築と検証

抄録

One of the critical challenges in improving the spark ignition performance and flame propagation under lean and high-turbulent engine-like conditions is to understand the mechanisms of flame propagation and quenching effects for fuel mixtures. For general numerical investigations on the spark ignition processes, detailed chemistry was commonly used for reaction calculations. In this study, simplified reaction mechanisms for single and multi-component hydrocarbon fuels were developed and validated with experimental results. A key aspect of the work involves using the DRGEP method to reduce chemical species and reactions in detailed models, followed by parameter optimizations of the reduced mechanisms through Gaussian process regression. In experiments, flame kernel behaviors were directly observed using high-speed cameras, and the validations particularly focused on the effective Lewis numbers and its effects on turbulent combustion characteristics.