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논문 기본 정보

자료유형
학술대회자료
저자정보
안태현 (전북대학교) 김홍석 (한국기계연구원) 박윤범 (제주산업정보대학) 김만영 (전북대학교)
저널정보
한국자동차공학회 한국자동차공학회 추계학술대회 및 전시회 2012년 한국자동차공학회 학술대회 및 전시회
발행연도
2012.11
수록면
486 - 493 (8page)

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To satisfy the NOx regulations which are being strengthened, the selective catalytic reduction (SCR) system based on urea water solution is an effective technique to reduce nitrogen oxides (NOx) emitted from diesel engines. However, a mobile SCR system is restricted to a short distance between the exhaust pipe and the SCR catalyst entrance. For this reason, this device has some issues associated with the ammonia slip phenomenon which is occurred by shortage evaporation and thermolysis time, and that makes it difficult to achieve uniform distribution on the injected urea. Therefore, in this work, the numerical study was performed by changing various parameters such as injector angle, exhaust gas temperature, and application of mixer to enhance evaporation and mixing of urea water solution with mixer application and injector angle between urea and exhaust gases. The mixer was located between injector and SCR catalyst entrance, and the injector angle changes from 30° to 60°. It can be observed that various parameters such as the angle of the injector and application of mixer significantly affect the evaporation and mixing of urea water solution with exhaust gases, and therefore, optimization of these parameters are required. Finally, it can be found that the cases adopted mixer with an injector angle of 30 or 60° showed the best performance in terms of the maximum NH3 concentration and uniformity, and suggested useful guidelines to achieve the optimum design of a urea-SCR injection system for improving DeNOx performance and reducing ammonia slip.

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Abstract
1. 서론
2. 수치해석 모델
3. 결과 및 고찰
4. 결론
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UCI(KEPA) : I410-ECN-0101-2014-556-000418191