摘要
利用AMESim液压仿真软件建立了某船用柴油机燃油喷射系统仿真模型,对燃油喷射系统的相关结构参数进行优化。再利用AVL_FIRE软件将优化结果与原机燃烧室基础上设计的双卷流燃烧室进行缸内燃烧计算,同时研究油束夹角为150°、155°、160°时对排放特性的影响。研究结果表明,0.24mm-14.0mm-0.46mm·（Ca A）-1-950mm-155°（喷孔直径-柱塞直径-凸轮型线速度-高压油管长度-油束夹角）参数组合,可以将喷油压力提高到105MPa,碳烟生成质量分数较原机降低约0.01‰,油束夹角为155°时,碳烟质量分数较油束夹角为150°和160°时低0.02‰~0.08‰,NOX质量分数较油束夹角为150°和160°时低0.03‰~0.12‰。
The simulation mode of a ship＇s fuel injection system is made by AMESim code, the structural parameters of the fuel injection system is optimized. The combustion simulation is proceeding with the optimized result of fuel injection system in double swirl combustion chamber. The emission level may be effectively reduced by the application of spray angles of 150°、155°、160°. The simulation result show that the pressure of fuel injection is enhanced by 105 MPa and the mass fraction of SOOT emission decreases by 0.01‰ when the fuel injection parameters is 0.24-14-0.46-950-155°（diameter of orifice-diameter of plunger-cam velocity-length of high pressure fuel pipe-spray angle）. When the spray angle is 155°, the concentration of the particle is lower than that at 155°and 160° by 0.02‰~0.08‰, and the NOX concentration is lower by 0.03‰~0.12‰.
出处
《船舶工程》
北大核心
2015年第8期21-24,51,共5页
Ship Engineering
基金
福建省自然科学基金(2012J01230)
福建省科技厅资助省属高校专项基金(JK2013025)
关键词
柴油机
双卷流燃烧室
燃油喷射
油束夹角
排放特性
diesel engine
double swirl combustion chamber
fuel injection system
spray angle
emission characteristics
