[디젤엔진부문] 대형디젤기관에서 EGR 적용에 따른 배기가스 예측에 관한 연구

In order to meet increasingly stringent emission standards, extensive research has been earned out to explore exhaust gas recirculation (EOR) to reduce NOx from diesel engines. Usually, reducing the oxygen concentration by EOR, however, results in a higher Smoke level. The effect of EOR on NOx and Smoke emissions in heavy duty diesel engine are studied numerically using a multi-dimensional code. Turbulent flows are simulated using the RNO k- e model as a governing equation. For atomization, TAB and wave instability breakup are modeled. And using the Watkins-Park model and Zeldo'vich model, wall impingement, NOx and Smoke formation respectively. Effect of EOR on NOx and Smoke have been discussed in details