| 摘要:采用三维计算软件AVL-FIRE模拟仿真了某国产低速二冲程柴油机的燃烧与排放，分析了废气再循环(EGR)对低速机燃烧与排放的影响。研究结果表明:EGR对低速机滞燃期影响不大，且使用EGR技术能够有效降低低速机NOx排放，低EGR率时能够满足Tier Ⅱ排放要求，并且油耗升高不明显；高EGR率时能够满足Tier Ⅲ排放法规要求。 |
| 关键词: 低速二冲程柴油机 废气再循环(EGR) 数值模拟 排放 |
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| 3D Simulation Research on Reducing Emission of Low SpeedEngines with Exhaust Gas Recirculation |
| Tao Yikai,Deng Kangyao,Wang Zhen,Liu Bo,Zhu Jun,Dou Jiayong |
| Shanghai Jiaotong University, Shanghai 200234;Hudong Heavy Machinery Co., Ltd, Shanghai 200129;China North Engine Institute,Shanxi Datong,037036 |
| Abstract:3D software AVL-FIRE was used to carry out simulation research on a domestically produced marine low speed two stroke diesel engine about its combustion and emission, and the influence of Exhaust Gas Recirculation (EGR) on the low speed engine was analyzed. The simulation results showed EGR makes NOx emission of low speed engines decline effectively, with short extension of ignition delay. Tier Ⅱ regulation could be met with a low EGR rate, with little increase of diesel consumption; Tier Ⅲ could be met with high EGR rate. |
| Key words: low speed two stroke engine Exhaust Gas Recirculation (EGR) numerical simulation emission |
