喷射正时及掺氨比对氨/柴油低速机性能影响研究
Study on the effect of injection timing and ammonia energy fraction on ammonia/diesel low speed engine
针对船用大缸径低速二冲程氨/柴油双燃料机,利用CONVERGE建立三维数值仿真模型,并依据实验数据对柴油、液氨喷雾及整机模型进行验证。基于高压直喷模式探究了液氨喷射正时及掺氨比对缸内燃烧、单缸性能及排放的影响。结果表明,高压直喷式氨/柴油双燃料机缸内燃烧基本分为三个阶段;随着液氨喷射正时提前,燃烧持续期缩短,功率输出、指示平均有效压力、热效率提高,NOX排放量增多,超过Tier III标准;随着掺氨比增加,燃烧持续期延长,功率输出、指示平均有效压…查看全部>>
For large-bore low speed two-stroke ammonia/diesel dual fuel marine engines,a three-dimensional numerical simulation model was established in CONVERGE,and the diesel,liquid ammonia spray and the engine model were verified based on the experimental data.The high-pressure direct injection mode was used to analyze the in-cylinder combustion of the engine under different liquid ammonia injection timing and ammonia energy fraction,and to summarize the effects of …查看全部>>
熊仟;潘聪懿;史歆如;刘龙;傅师翊;
TK46+4
dual-fuel engine high-pressure direct injection injection timing ammonia energy fraction numerical simulation
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