【摘要】 研究对象为一台由柴油机改造的火花点火甲醇发动机,应用AVL-FIRE软件的FEP技术建立进气道-进气门-气缸部分三维动态网格,建立数学模型并验证了模型的可行性;详细分析了缸内流体速度场分布,甲醇与空气的混合气燃烧火焰扩散及传播过程;研究了火花塞位置对甲醇发动机燃烧过程的影响,结果表明火花塞设置在原柴油机喷油器处较为合理。更多还原

【Abstract】 The research was carried out on a spark-ignition methanol engine which was modified from a diesel engine.The three-dimensional moving meshes reflecting the intake port,intake valve and cylinder were generated by AVL-FIRE software with the technology of FEP,and the mathematical model was built and its feasibility was verified.According to the simulation results,the fluid velocity field distributing,combustion flame spread and propagation process of the mixture gas which contains methanol and air were analyzed in detail.The influence of different spark plug location on the combustion process of methanol engine was simulated and researched as well,the result shows that arranging the spark plug in the original location of fuel injector is more applicable.更多还原