【摘要】 用零维热力学模型模拟计算二甲基醚发动机的燃烧放热率 ,将模拟计算结果与实验结果进行对比 ,两者数据吻合 ;在对三种热力学模型的预测结果进行对比分析的基础上 ,选取与实验值吻合最好的Watson模型对相同结构和运行参数的DME发动机与柴油机进行计算对比 ,结果符合理论分析与实验观察 ;说明零维模型不仅适用于柴油机的性能预测分析 ,亦适用于DME发动机运行参数的预测更多还原

【Abstract】 This paper presents computational method of heat release rate of DME engines by numerical simulation based on zero-dimensional model.The result of simulations are compared with experimental data, the good agreement between them are obtained. Three well documented heat release models are investigated and the Watson model is proved to be the best by making comparison between their predicting results and experimental data .Then the Watson is used to simulate the effects of operation parameters on pressure diagram and heat release characteristics and the results are accord with analysis of theory and observation of experiment.The result shows that zero-dimensional model is suitable to predicting performance characteristics of engines operated with DME besides diesel engines.更多还原