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논문 기본 정보

자료유형
학술대회자료
저자정보
Otgonbat Pionyer (Ulsan University) Narankhuu Jamsran (Ulsan University) Ocktaeck Lim (Ulsan University)
저널정보
한국자동차공학회 한국자동차공학회 춘계학술대회 2013 KSAE 부문 종합학술대회
발행연도
2013.5
수록면
522 - 533 (12page)

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This study was computationally investigated the effects of EGR and boost pressure to confirm the mechanisms for extending operation range and reducing NOx emission of a HCCI engine fueled with natural gas. The CHEMKIN-PRO was used to perform the numerical analysis. To set boundary of operating range, boost pressure was varied from 0.1MPa to 0.2MPa and EGR was varied from 10% to 50%. In the result, HCCI fueled with natural gas was found single stage heat release which was composed with the thermal-ignition preparation and thermal ignition. These two stages were determined mainly by H₂O₂ loop reactions, H2-O2 system reactions respectively. Also, mole fractions of H₂O₂, CH₂O and OH were considered to effect on those stages. The H₂O₂ loop reactions begin to active when the OH formation by the H₂O₂ +M → 2OH + M become at about 950K. The H₂-O₂ system reactions were begun when the transient temperature reaches over than 1200K in this study. As the increase of amount of EGR, number of important reactions and transient temperature of the contribution matrix were degreased. When we use intake pressure, number of important reactions and transient temperatures of the contribution matrix were increased. Finally, NOx emission was lower due to in-cylinder temperature lower.

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Abstract
1. INTRODUCTION
2. CALCULATION METHOD
3. RESULTS
4. CONCLUSION
References

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UCI(KEPA) : I410-ECN-0101-2014-550-002586698