Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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A Prediction on the Flammability Limits of Biodiesel Fuel in the High Temperature and Pressure Conditions

고온·고압 조건에서 바이오디젤의 가연한계 예측

  • 임영찬 (공주대학교 기계공학과 대학원) ;
  • 정준우 (공주대학교 기계공학과 대학원) ;
  • 서현규 (공주대학교 기계자동차공학부)
  • Received : 2019.08.23
  • Accepted : 2019.10.21
  • Published : 2019.12.30
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Abstract

This numerical study was analyzed to predict the flammability limits of biodiesel and diesel fuels in the high temperature and pressure conditions. To achieve this, the biodiesel fuel was simulated with the chemical species of n-heptane (n-C7H16), methyl decanoate (C11H22O2), and methyl-9-decenoate (C11H20O2), and the diesel fuel was substituted the chemical species of n-heptane. The closed 0-D homogeneous reactor model which was employed the 1100 K of ambient temperature and 35 atm of ambient pressure was used for the simulation of constant volume combustion, and the equivalence ratio was changed from 0.3 to 2.5 conditions. In addition, a comparative analysis study was conducted with the results of HCCI engine simulation and flammability limits according to the changes of equivalence ratio. The results of combustion temperature, pressure, and ignition delay were increased when the equivalence ratio elevated from 0.3 to 1.3 conditions because the increase in fuel oxidation rate affects the chemical reaction of the overall combustion process. Furthermore, the CO and NOX production under the rich combustion conditions are considered to have a trade off relationship since the OH radicals and O2 chemical species are greatly affected the CO and NOX production and oxidation processes.

Keywords

References

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