Evaluation of Auto-Ignition Characteristics of Diesel Surrogate Fuels with the Same Derived Cetane Numbers at Changed Thermodynamic Environments  

作　　者：ZHANG Cong GUAN Yuanhang HUANG Zhen HAN Dong 

机构地区：[1]Key Laboratory for Power Machinery and Engineering,Ministry of Education,Shanghai Jiao Tong University,Shanghai,200240,China [2]College of Smart Energy,Shanghai Jiao Tong University,Shanghai,200240,China [3]Shanghai Non-carbon Energy Conversion and Utilization Institute,Shanghai,200240,China

出　　处：《Journal of Thermal Science》2024年第4期1590-1606,共17页热科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.52022058);the Shanghai Science and Technology Committee(Grant No.19160745400)。

摘　　要：The ignition tendency of diesel fuels is highly sensitive to ambient conditions and fuel properties.In this study,the ignition characteristics of different diesel surrogate fuels with the same derived cetane numbers(DCN)were measured and compared in varied thermodynamic and oxidizing environments.The combustion pressures,heat release rates,ignition delays,and combustion delays of the test fuels were compared.The experimental results showed that the diesel surrogate fuels with the same DCNs exhibit similar ignition propensity at standard DCN test conditions.Further,for the test conditions of high cetane fuels,high ambient temperatures,and suficient oxygen concentrations,surrogate fuels with the same DCN have similar ignition behaviors,and using the DCN to evaluate fuel ignition tendency is appropriate.However,for the test conditions of low cetane fuels,low ambient temperatures,and reduced oxygen concentrations,different ignition behaviors are observed for the surrogate fuels with the same DCN,so at these conditions using DCN as the evaluation index for fuel ignition tendency may lead to higher uncertainty.

关 键 词：diesel fuels surrogate fuels derived cetane numbers constant volume combustion chamber 

分 类 号：TE626.24[石油与天然气工程—油气加工工程]