Abstract
The purpose of this study was to analyze numerically the homogeneous combustion characteristics of biodiesel and diesel fuels and to investigate the effect of changes in ambient conditions on the homogeneous combustion and flammability limits of biodiesel and diesel using a surrogate species coupled with a combustion mechanism. The ignition delay characteristics of biodiesel and diesel were shown to be below 2 ms when the ambient temperature was less than 1000 K, and at the same time, the ambient pressure was above 20–25 atm. The combustion temperature, combustion pressure, and NOX emissions increased because the chemical reaction rate was influenced by the acceleration of the overall oxidation rate during combustion until the peak point of calculated analysis data among the whole ranges of equivalence ratio conditions. The CO emissions increased as the equivalence ratio rose. Thus, changes in the effect of ambient conditions on the homogeneous combustion characteristics of biodiesel and diesel fuels suggest that formation/oxidation related to the fuel combustion and emission reactions are limited to the thermo-chemical factors.
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22 April 2022
An Erratum to this paper has been published: https://doi.org/10.1007/s12206-022-0349-6
Abbreviations
- ATDC :
-
After top dead center
- BTDC :
-
Before top dead center
- CI :
-
Compression ignition
- CO :
-
Carbon monoxide
- CVCC :
-
Constant volume combustion chamber
- EGR :
-
Exhaust gas recirculation
- EVO :
-
Exhaust valve opening
- HCCI :
-
Homogeneous charge compression ignition
- IS-:
-
Indicated specific
- ISFC :
-
Indicated specific fuel consumption
- IMEP :
-
Indicated mean effective pressure
- IVC :
-
Intake valve closing
- NO X :
-
Nitrogen oxides
- NTC :
-
Negative temperature coefficient
- ppm :
-
Part per million
- SFC :
-
Specific fuel consumption
- SOI :
-
Start of injection
- ϕ, Φ :
-
Equivalence ratio
- m inj :
-
Injection mass
- P amb :
-
Ambient pressure
- P inj :
-
Injection pressure
- P max :
-
Maximum cylinder pressure
- T amb :
-
Ambient temperature
- T init. :
-
Initial temperature
- T max :
-
Maximum cylinder temperature
- t inj :
-
Injection timing
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Acknowledgments
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2020R1A2C1011641).
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Young Chan Lim is studying in graduate school of mechanical engineering, Kongju National University, Cheonan, Korea. He has interested in thermal engineering, chemical reaction and combustion analysis in automotive engineering, and low temperature combustion.
Hyun Kyu Suh is working in Division of Mechanical & Automotive engineering, Kongju National University, Cheonan, Korea. He has interested in thermal engineering, spray atomization and combustion in automotive engineering, and computational fluid dynamics applications.
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Lim, Y.C., Suh, H.K. Effect of changes in ambient conditions on the homogeneous combustion characteristics and flammability limits of biodiesel fuel combustion using surrogate fuel coupled with a combustion mechanism. J Mech Sci Technol 36, 1587–1597 (2022). https://doi.org/10.1007/s12206-022-0244-1
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DOI: https://doi.org/10.1007/s12206-022-0244-1