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급가감속 운전에 따른 듀얼 모노리스형 촉매변환기 내의 유동 균일도와 압력 강하에 관한 연구

Title
급가감속 운전에 따른 듀얼 모노리스형 촉매변환기 내의 유동 균일도와 압력 강하에 관한 연구
Other Titles
A Study on the Flow Uniformity and Pressure Drop in Dual Monolith Catalytic Converter during the Rapid Acceleration/Deceleration Driving
Author
김우승
Keywords
Dual Monolith Catalytic Converter(듀얼 모노리스형 촉매변환기); Uniformity Index(유동 균일도); Pressure Drop(압력 강하); Diffuser Angle(확대관 각도); Air-Gap Length(공기 간극 길이)
Issue Date
2006-06
Publisher
한국자동차공학회
Citation
한국자동차공학회 2006년 춘계학술대회 논문집, v. 1, Page. 50 - 57
Abstract
Conversion efficiency, durability and pressure drop of automotive exhaust catalysts are dependent on the flow distribution within the substrate. Conventional porous medium approach assuming monolith resistance based on one-dimensional laminar flow for simulating the flow through automotive exhaust catalysts overpredicts the flow uniformity in the monolith. In this study, additional pressure loss accounting for entrance effects due to oblique flow incident on the front face of monolith as a consequence of flow separation and recirculation within the diffuser is considered and incorporation of an additional pressure loss improves the predictions for the maximum flow velocity within the substrate. A numerical study of three-dimensional unsteady incompressible non-reacting flow inside various dual-monolith catalytic converters for the rapid acceleration/deceleration driving has also been conducted.
URI
http://www.dbpia.co.kr/journal/articleDetail?nodeId=NODE00740662&language=ko_KRhttps://repository.hanyang.ac.kr/handle/20.500.11754/108961
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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