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건설기계용 Urea-SCR 시스템의 촉매전단에서 암모니아 균질도 해석 및 DeNOx 성능에 관한 연구Study on Ammonia Uniformity and DeNOx Analysis in the Urea-SCR System for Construction Machinery
- Other Titles
- Study on Ammonia Uniformity and DeNOx Analysis in the Urea-SCR System for Construction Machinery
- Issue Date
- Jun-2019
- Publisher
- 한국분무공학회
- Keywords
- Urea-SCR(선택적 환원 촉매); Urea injector(요소수 인젝터); Spray characteristics(분무 특성); Ammonia uniformity index(암모니아 농도균일도지수)
- Citation
- 한국분무공학회지, v.24, no.2, pp 51 - 57
- Pages
- 7
- Indexed
- KCI
- Journal Title
- 한국분무공학회지
- Volume
- 24
- Number
- 2
- Start Page
- 51
- End Page
- 57
- ISSN
- 1226-2277
2288-9051
- Abstract
- In this study, the spray atomization characteristics of urea injector used in SCR system for construction machinery was analyzed, and the uniformity index at the front of mixer and NOx conversion efficiency were evaluated through numerical analysis. Spray visualization and droplet size/velocity measurement were performed and the measured results were used to verify the spray analysis model to calculate the uniformity index in the exhaust gas after-treatment system. For the flow analysis, STAR-CCM, a three-dimensional CFD, was used and the uniformity index of the SCR system at the front of the mixer was calculated using the droplet dissociation model and the wall collision model. Finally, the DeNOx performance for the average condition of the NRTC driving mode was calculated to understand the NOx conversion efficiency reflecting the exhaust gas temperature. The simulation results show that the uniformity index at the front of mixer was calculated as 0.862 and DeNOx efficiency was 75.9%.
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Collections - 서울 공과대학 > 서울 기계공학부 > 1. Journal Articles
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Related Researcher
- Park, Sungwook
- COLLEGE OF ENGINEERING (SCHOOL OF MECHANICAL ENGINEERING)