基于不同燃烧模型的二甲基醚发动机工作过程模拟研究  

Simulation Based on Different Mathematical Models of Combustion Process for DME Engines

作　　者：徐春[1] 张煜盛 

机构地区：[1]华中科技大学,武汉430074

出　　处：《小型内燃机与摩托车》2003年第4期1-4,共4页Small Internal Combustion Engine and Motorcycle

摘　　要：利用韦伯 (Wiebe)模型、Watson模型、Whitehouse Way模型以及化学动力学着火模型模拟计算了DME发动机的燃烧放热率 ,并将模拟计算结果与试验结果进行了对比。在对喷油正时、燃烧始角、循环供油量以及燃料热值等计算初始参数进行适当调整的基础上 ,上述模型的模拟计算结果与DME发动机实测数据基本吻合 ,说明上述各模型不仅适用于柴油发动机的性能预测分析 。This paper presents computational method of heat release rate of DME engines by numerical simulation based on Wiebe model, Watson model and Whitehouse Way model. The results of simulations are compared with that of experimental data to check these models' reliability and feasibility in predicting working process of DME engines. The comparison shows that only with proper adjustment of several initial parameters such as fuel injection timing, start angle of combustion, fuel supply per cycle etc., can the good agreement between results of simulation and experimental data be obtained. The results show that above mentioned three models are suitable to predicting performance characteristics of engines operated with DME.

关 键 词：燃烧模型 二甲基醚 发动机 燃烧放热率 内燃机 

分 类 号：TK407.9[动力工程及工程热物理—动力机械及工程]