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Spray,atomization and combustion characteristics of oxygenated fuels in a constant volume bomb:A review

Journal of Traffic and Transportation Engineering(English Edition) 2020年第3期7卷 282-297页

作者： Peng Zhang Xin Su Chengshan Yi Hao Chen Hongming Xu Limin Geng School of Automobile Chang'an UniversityXi'an 710064China School of Civil and Transportation Engineering Qinghai Nationalities UniversityXining 810007China Department of Mechanical Engineering University of BirminghamEdgbaston B152TTUK

Biofuels have extensive available resources and have an immense potential as promising alternative fuels for *** application advantages of biofuels are mainly reflected as particulate matter(PM)reduction,carbon neutral,greenhouse gases reduction,waste utilization,energy and economic security,and fuel *** on the understanding of molecular structure effects of biofuels on soot formation and particles morphology,the effects of alcohols,ethers,esters and biodiesel on spray and combustion process in constant volume bomb in recent years are retrospectively analyzed in this *** the mixture,macromolecular ester fuels and polyoxymethylene dimethyl ether(PODE)are conducive to the improvement of liquid spray,while biodiesel,small molecules,dimethyl ether(DME)and alcohols are *** are advantageous to the extension of mixing time and the increasing of vapor-phase *** the influence integrated assessment,alcohols show the best performance on the spray,atomization and combustion,while biodiesels show the *** in terms of combustion,PODE is the best choice without considering spray and *** binary alternative-diesel fuel blends,methanol or butanol is the best additive based on synthetically considerations on spray,atomization and *** meet the requirements of the fuel application of diesel engine,ternary fuel or even quaternary fuel have been proposed and *** review can help to form a systematic understanding on fuel recombining and obtain the guide of clean and efficient fuel formulation for diesel engine.

关键词： Oxygenated biofuel Spray Atomization Combustion constant volume bomb

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Influence of Mixture Gas Conditions on the Laminar Combustion Characteristics of Natural Gas

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Journal of Thermal Science 2024年第3期33卷 1231-1241页

作者： LOU Diming ZHU Kan ZHANG Yunhua REN Yedi TAN Piqiang FANG Liang FAN Lanlan School of Automotive Studies Tongji UniversityShanghai201804China Ji’nan Power Co.Ltd Sinotruk GroupJi’nan250200China

Natural gas is a promising alternative fuel for the internal combustion engine,and natural gas engine has become an efficient and feasible measure to deal with the energy shortage and climate *** the laminar flame characteristics are the foundation of the turbulent flame,the laminar flame characteristics of natural gas have a significant impact on the combustion status and efficiency of the engine.A visual constant volume bomb was used to study the influence of the gas components,different excess air coefficient(λ),and initial conditions on the laminar combustion characteristics of natural *** experimental results showed that when the initial pressure and temperature were 0.1 MPa and 300 K respectively,compared to propane,ethane had a remarkable influence on the equivalent-combustion laminar-combustion-speed,with an average increase of approximately 5.1%for every 2.5%increase in the ethane *** laminar combustion velocity of the natural gas under different excess air coefficients had a maximum value at aboutλ=1.0,and the Markstein length of the flame decreased with the increase of theλ.The increase in the initial pressure of the mixture resulted in a decrease in the equivalent-combustion laminar-combustion-speed of the flame,a significant decrease in the Markstein *** increase of the initial temperature of the mixture led to a rapid increase of the equivalent-combustion laminar-combustion-speed,but the effect on the flame Markstein length was not dominant.

关键词： constant volume bomb natural gas engine combustion characteristics laminar combustion velocity Markstein length

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