预测二甲醚发动机燃烧性能的准维多区燃烧模型  

Quasi-Dimensional Multi-Zone Combustion Model for the Prediction of Performance of Dimethyl Ether Engines

作　　者：孟祥慧[1] 王锡斌[1] 蒋德明[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《西安交通大学学报》2003年第1期60-63,共4页Journal of Xi'an Jiaotong University

基　　金：国家“九七三”重点基础研究发展规划资助项目(2001CB20908);国家自然科学基金重点资助项目(50136040);福特中国研究发展基金资助项目(50122166).

摘　　要：模型详细考虑了二甲醚(DME)发动机内燃油的喷雾、卷吸、传热、着火燃烧等过程.计算结果显示,模型采用正弦喷油规律更为合理;模型采用等质量和等径向间距两种油束分区方法得到的结果相同;计算的示功图和压力升高率曲线与实测结果吻合较好;计算的燃烧放热率曲线很好地揭示了DME发动机燃烧的特点.该模型能够成功地模拟DME发动机各个工况下的燃烧过程.A new quasi-dimensional multi-zone combustion model has been developed to predict the performance of dimethyl ether(DME) engine. The model includes sub-models of fuel spray, mass entrainment, heat transfer and combustion process. The calculation results indicate that the assumed injection process as a sine law is more reasonable. The grid generation methods, whether according to mass or radial distance, do not make distinct difference on the results. The calculated pressure and the rate of pressure rise agree with those of experiments very well. The calculated heat release curves reveal the combustion characteristics of DME engine. The model successfully simulates the combustion process under various conditions of DME engine.

关 键 词：二甲醚发动机 燃烧性能 准维多区燃烧模型 正弦油规律 性能预测 燃烧过程 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程] TK411.2