Urea-SCR 인젝터의 분사압력 조건에 따른 분무거동 특성에 관한 연구

다국어 초록 (Multilingual Abstract)

Recently, many technologies have been developed in order to satisfy environmental regulations in the automotive industry. In particular, hybrid and electronic vehicles technological innovation somewhat less than expected and coverage range of diesel engine is expanded to passenger car and light duty truck. And then diesel vehicle has increased significantly in recent years. Because modern diesel engines represent the most cost-effective propulsion methods for improving fuel efficiency and reducing CO₂ emissions in automotive application. However, diesels are known as compression ignition engines, so diesel emission do contain relatively high levels of nitrogen oxides(NOx) and particulate matter(PM). Diesel particulates are harmful to human health as well as aesthetically unpleasant. NOx is a key ingredient in the formation of urban smog, and contribute to the formation of acid rain. Therefore, many countries including advanced countries will be stipulated more stringent emission regulation, especially for the NOx and PM emissions. So, diesel vehicles should be equipped with advanced aftertreatment technology that aims to reduce NOx and PM emissions. Urea-SCR systems are methods of reducing NOx emissions. The basis of this technology consist of a urea solution. Which is sprayed into the stream in front of a specialized catalytic converter. The urea is passively converted into ammonia NH₃, which in turn reacts with NOx and oxygen to create nitrogen and water. In Europe, these technologies are actively researched. In this paper, described spray behavior characteristics of urea solution about 3-hole injection in the exhaust pipe. The purpose of this study was to investigate the spray characteristics of the injector at various injection pressure conditions by using STAR CCM+ code, such as the spray distance and velocity. Moreover, this study is verified by comparing CFD analysis results with experimental results.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 해석 조건
• 3. 해석 결과
• 4. 결론
• References