替代率对某船用中速双燃料发动机性能的影响  

Effect of substitution rate on the performance of a medium speed dual-fuel engine of ship

作　　者：张玉学 孙宾宾[1] 李波[1] 李晓晨 王子喆 ZHANG Yuxue;SUN Binbin;LI Bo;LI Xiaochen;WANG Zizhe(School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学交通与车辆工程学院,山东淄博255049

出　　处：《山东理工大学学报（自然科学版）》2025年第1期1-6,共6页Journal of Shandong University of Technology:Natural Science Edition

基　　金：国家自然科学基金项目(52375105);山东省重大科技创新工程项目(2021CXGC010703);山东省优秀青年人才基金项目(ZR2022YQ51)。

摘　　要：为了改善某船用中速柴油机的燃油经济性和排放特性,对进气歧管加装天然气喷射装置的柴油/天然气双燃料发动机进行研究。基于仿真软件GT-Power,在螺旋桨推进特性的工况下,分析了某船用双燃料发动机纯柴油模式和双燃料模式下的缸内压力、燃油经济性和排放特性。结果表明:与纯柴油模式相比,双燃料模式的气缸峰值压力和NO_(x)排放量有所减少,NO_(x)排放量最多减少41.3%;随着天然气替代率的增加,发动机的燃油经济性最多提高了16.08%。综合来看,双燃料模式下发动机性能得到提升。In order to improve the fuel economy and emission characteristics of a medium speed marine diesel engine,a diesel/natural gas dual-fuel engine with a natural gas injection device in the intake manifold was studied.Based on the simulation software GT-Power,the in-cylinder pressure,fuel economy and emission characteristics of a marine dual-fuel engine in pure diesel mode and dual-fuel mode are analyzed under the working condition of propeller propulsion characteristics.The results show that compared with pure diesel mode,the peak in-cylinder pressure and NO_(x) emission of dual-fuel mode are reduced,and the NO_(x) emission is reduced by up to 41.3%.With the increase of natural gas substitution rate,the fuel economy of the engine increases by 16.08%.Overall,the dual-fuel mode engine performance has improved.

关 键 词：船用双燃料发动机 替代率 燃油经济性 NOX排放 

分 类 号：TK431[动力工程及工程热物理—动力机械及工程]