| 摘要:采用SAGE详细化学反应机理燃烧模型，加入液滴破裂、蒸发、碰撞以及碰壁子模型，建立了ACD320DF船用中速双燃料发动机缸内及进排气道的三维仿真模型。在气体模式下对不同引燃柴油喷射策略下的缸内燃烧特性进行数值模拟分析。分析表明:引燃柴油的喷油时刻与喷油量对发动机的燃烧及排放有重要影响。根据发动机工况合理调整微引燃柴油的喷射策略，则能得到较好的燃烧和排放性能。 |
| 关键词: 船用中速双燃料发动机 引燃柴油 喷射时刻 喷射量 |
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| Study on the Effect of Pilot Diesel on the Combustion and Emission ofMedium-Speed Dual Fuel Engine |
| Yu Yonghua,Wang Guixin,Yang Jianguo |
| School of Energy and Power Engineering, Wuhan University of Technology, Hubei Wuhan 430063;Key Laboratory of Marine Power Engineering Granted by Ministry of Transport,Wuhan University of Technology, Hubei Wuhan 430063 |
| Abstract:SAGE combustion model coupled with detailed chemical reaction mechanism, and embedded with drop break-up, evaporation, collision, wall interaction submodels, was used in setting up a three dimensional simulation model which involves the in-cylinder, inlet and outlet for the ACD320DF marine medium-speed dual fuel engine. In gas mode, simulations were conducted under various micro-pilot diesel injection parameters. It is shown that pilot diesel parameters including injection timing and quantity have great impact on combustion characteristics and emission behaviors. To achieve better combustion and emission performance, micro-pilot diesel injection strategy should be adjusted upon the variation of engine working conditions. |
| Key words: marine medium-speed dual fuel engine pilot diesel injection timing injection quantity |
