| 摘要:为解决某大型气体燃料发动机燃烧不稳定、燃烧速率慢、热效率下降甚至失火等问题，采用预燃室式燃烧系统并以预燃室混合气加浓的方式实现点火燃烧。应用三维CFD软件CONVERGE对该发动机的排气、进气、压缩和燃烧过程进行了三维CFD数值模拟分析，得到了燃烧室压力、温度、放热率曲线及温度场变化过程等参数；并比较分析了不同点火时刻对燃烧性能的影响。 |
| 关键词: 船用气体发动机 预燃烧室 燃烧性能 |
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| Simulation Analysis of a Marine Gas Engine Based on CONVERGE Software |
| Zhou Xiuya,Han Lianren,Xu Zhen |
| China Shipbuilding Power Engineering Institute Co.,Ltd., Shanghai 200127 |
| Abstract:In order to solve the combustion problems of a large gas engine, such as combustion instability, slow combustion rate，and reduction of thermal efficiency or even misfire, pre-chamber combustion system was employed and the concentration of gas mixture in pre-chamber was increased to realize ignition and combusiton. Analysis was carried out using 3-D CFD software package CONVERGE to simulate the engine’s exhaust, intake, compression and combustion process. Based on the simulation results, the pressure,the temperature,the heat release rate curve and the change of temperature field of the combustion chamber were obtained, and the influence of different ignition timing on combustion performance were compared and analyzed with each other. |
| Key words: marine gas engine pre-chamber combustion performance0 |
