요소수 분무특성이 SCR시스템 내 분무균일도에 미치는 영향

• Published in: 한국분무공학회지 Vol. 24; no. 4; pp. 178 - 184
• Main Authors: 김세훈, Kim Se Hun, 고진석, Ko Jin Seok, 고재유, Ko Jae Yu, 조영준, Cho Young Jun, 이동률, Lee Dong Ryul
• Format: Journal Article
• Language: Korean
• Published: 한국분무공학회 31.12.2019
• Subjects: NOx; SCR; Spray characteristics; Uniformity index; Urea injector; 기계공학; 분무 특성; 분무균일도; 선택적 환원 촉매; 요소수 분사모듈; 질소산화물
• ISSN: 1226-2277; 2288-9051
• DOI: 10.15435/JILASSKR.2019.24.4.178

Diesel engines have the advantages of higher thermal efficiency and lower CO2 emissions than gasoline engines, but have the disadvantages that particulate matter (PM) and nitrogen oxides (NOx) emissions are greater than those of gasoline engines. In particular, nitrogen oxides (NOx) emitted from diesel engines generates secondary ultrafine dust (PM2.5) through photochemical reactions in the atmosphere, which is fatal to humans. In order to reduce nitrogen oxides (NOx), pre-treatment systems such as EGR, post-treatment systems such as LNT and Urea SCR have been actively studied. The Urea SCR consists of an injection device injecting urea agent and a catalytic device for reducing nitrogen oxides (NOx). The nitrogen oxide (NOx) reduction performance varies greatly depending on the urea uniformity in the exhaust pipe. In this study, spray characteristics according to the spray hole structure were confirmed, and the influence of spray uniformity on spray characteristics was studied through engine evaluation.