CAJ | 학술논문

在KIVA源程序中向燃料库添加液态DME的各种物性参数数据模块,建立二甲醚燃料库,针对二甲醚燃料建立油束模型和燃烧模型,并把这些数学模型耦合入KIVA后形成子程序,并建立二甲醚燃烧数值仿真计算平台.利用建立的平台计算二甲醚柴油缸内燃烧温度场.得出:仿真结果与试验结果相同,所建立的二甲醚燃烧过程数值模拟平台是有一定的实用性.研究结果表明:燃用二甲醚的发动机相对于燃用柴油的发动机的燃烧时刻相对提前,对应不同时刻的二甲醚发动机缸内最高温度均小于柴油发动机,且高温分布范围较小,这将抑制NO_x的生成.
재KIVA원정서중향연료고첨가액태DME적각충물성삼수수거모괴,건립이갑미연료고,침대이갑미연료건립유속모형화연소모형,병파저사수학모형우합입KIVA후형성자정서,병건립이갑미연소수치방진계산평태.이용건립적평태계산이갑미시유항내연소온도장.득출:방진결과여시험결과상동,소건립적이갑미연소과정수치모의평태시유일정적실용성.연구결과표명:연용이갑미적발동궤상대우연용시유적발동궤적연소시각상대제전,대응불동시각적이갑미발동궤항내최고온도균소우시유발동궤,차고온분포범위교소,저장억제NO_x적생성.
In order to achieve clean and efficient combustion of Engine, DME, as the alternative fuel of com-pression ignition engine, has attracted wide attention both at home and abroad. In this paper, we add various physical parameters data module of liquid DME to fuel depots at KIVA source, set up DME fuel depots, set up spray combustion model for DME fuel, and couple the mathematical model into KIVA to form sub-procedures and set up numerical simulation computing platform of DME combustion, we use the platform for computing DME and diesel cylinder combustion temperature field. The simulation results and the experimental results a-gree, and DME numerical simulation platform set up by the combustion process is to be employed. The results show that: Engine fueled with dimethyl ether compared with diesel engine has a relatively early time of com-bustion, The maximum temperature of cylinder corresponding to different moments of the DME engine is less than diesel engine, and has a smaller high temperature range, which will inhibit the generation of NO_x.