| 摘要:采用米勒循环结合可调两级增压,降低某船用柴油机的NOx排放和燃油消耗率。对进气门关正时、扫气重叠期进行了多方案计算,确定了该机的米勒正时；建立了可调两级增压系统性能仿真分析模型,研究了不同增压器大小、旁通调节方案对推进特性各工况性能的影响,设计了较佳的可调两级增压方案。研究结果表明:设计方案可使该机在推进特性下,综合NOx排放降低38%,油耗降低2.5%。 |
| 关键词: 船用柴油机 米勒循环 二级涡轮增压 NOx 燃油消耗率 |
|
| Design of Miller Cycle and Two Stage Turbocharging System on Marine Diesel |
| Wang Qifu,Cui Yi,Deng Kangyao,Wang Xinquan,Li Xiang |
| Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai Jiaotong University, Shanghai 200030;Shanghai Marine Diesel Engine Research Institute,Shanghai 201108 |
| Abstract:In order to reduce the NOx emission and fuel consumption rate of a turbocharged marine diesel engine, Miller cycle and two stage turbocharging system were adopted. Different IVC and VOD timings were chosen for calculation and analysis, and Miller timing was determined. At the same time, variable two stage turbocharging system model was built. Effects of different sizes of turbochargers and bypass solutions on performance of propeller law have been studied. Finally an optimized variable two stage formula was designed. Results showed that NOx emission was reduced by 38% and fuel efficiency by 2.5%. |
| Key words: marine diesel engine Miller cycle two stage turbocharging system NOx fuel consumption rate〖FL |
