DME发动机准维直喷燃烧模型  

Quasi-dimensional spray combustion model in DME engine with detailed chemistry

作　　者：徐波[1] 张煜盛 

机构地区：[1]华中科技大学动力机械及工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2013年第3期110-114,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51176057);高等学校博士学科点专项科研基金资助项目(20100142110081)

摘　　要：为了能够预测二甲醚(DME)燃料缸内直喷燃烧及排放过程,基于该燃料气相喷雾雾化模型,推导出DME准维燃烧分区模型.通过气相射流模型对缸内情况进行分区,采用CHEMKIN库函数求解每个区化学反应速度.模型基于DME详细化学反应机理(包含79个物种、399步基元反应),采用DVODE算法对微分方程组进行求解,能够对DME着火过程进行模拟,并且能够对多种排放物(CO,NOx等)进行模拟预测.A quasi-phenomenon multi-zone spray atomization model was developed to simulate the combustion and emission of direct injection engine with DME （dimethyl ether） as the fuel. The description of the spray mixing process was based on quasi-dimensional gas jet model. The combustion process in every divided zone was controlled by chemical reactions and computed using CHEMKIN code. The CHEMKIN libraries were used to formulate a stiff chemical kinetic solver suitable for inte gration within the engine cycle simulation. The simulation was based on the DME mechanism with detailed chemical reactions （79 species and 399 reactions）. In this simulation, the partial differential equations were solved using DVODE code. The model can reveal the combustion process of DME and the produce of exhausts such as （CO, NOx）.

关 键 词：燃烧 雾化 化学反应 二甲醚(DME) 准维燃烧分区模型 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]