27 0

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

Title
급가감속 운전에 따른 듀얼 모노리스형 촉매변환기 내의 유동 균일도와 압력 강하에 관한 수치적 연구
Other Titles
An Numerical 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
2007-10
Publisher
한국자동차공학회
Citation
한국자동차공학회논문집, v. 15, No. 5, Page. 63 - 71
Abstract
The conversion efficiency, durability and pressure drop of the automotive exhaust catalysts are dependent on the flow distribution within the substrate. Conventional porous medium approaches assuming monolith resistance based on the one-dimensional laminar flow for simulating the flow through the automotive exhaust catalysts over-predict the flow uniformity in the monolith. In this study, additional pressure loss is also considered by accounting for entrance effects due to the oblique flow incident on the front face of monolith as a consequence of flow separation and recirculation within the diffuser. The incorporation of an additional pressure loss improves the predictions for the maximum flow velocity within the substrate. An numerical study has also been conducted for the three-dimensional unsteady incompressible non-reacting flow inside various dual-monolith catalytic converters for the rapid acceleration/deceleration driving.
URI
http://www.dbpia.co.kr/journal/articleDetail?nodeId=NODE00873102&language=ko_KRhttp://repository.hanyang.ac.kr/handle/20.500.11754/107052
ISSN
1225-6382
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE