基于AVL-FIRE模拟的氢内燃机转速对其燃烧特性的影响

Influences of the Speed of Hydrogen Internal Combustion Engine on Combustion Characteristics Based on AVL-FIRE Simulation

为了研究转速对氢燃料内燃机燃烧特性的影响规律,对1台经过改装的燃氢内燃机用AVL-FIRE模拟了其燃烧过程,分析了发动机转速对其燃烧特性的影响规律,从分析结果看出,该氢内燃机对中低转速适应性较好.分析成果可为相关研究参考.

In order to gain influences of speed on combustion characteristics of hydrogen internal combustion engine, taking a modified hydrogen internal combustion engine as an example, its combustion process was simulated by AVL-FIRE software, the compression process of the piston was simulated by the moving grid, and overall grid of computational domain was formed by the block partitioning technique, then differential equations were solved based on the internal procedures of AVL-FIRE. According to the calculation results, influences of the engine rotational speed on its combustion characteristics were analyzed, and then the characteristics were obtained that hydrogen engine could adapt to different speed, timely combustion.