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Comparison of Experimental and Numerical Analysis for Durability Design Criteria in Ceramic Catalyst Substrate  

Beak, Seok-Heum (Department of Mechanical Engineering, Dong-A Univ.)
Cho, Seok-Swoo (Department of Vehicle Engineering, Kangwon National Univ.)
Publication Information
Journal of the Korean Society for Precision Engineering / v.27, no.9, 2010 , pp. 58-66 More about this Journal
Abstract
This study examines thermal safety on three-way catalyst that dominates 70 % among whole exhaust gas purification device in 2003. Three-way catalyst durability in the Korea requires 5 years/80,000 km in 1988 but require 10 years/120,000 km after 2002. Three-way catalyst durability in the USA requires 7 years/120,000 km but require 10 years/160,000 km after 2004. Three-way catalyst maintains high temperature in interior domain but maintains low temperature on outside surface. Therefore this device shows tensile stress on outside surface. Temperature distribution of three-way catalyst was acquired by thermal flow analysis for predicted thermal flow parameter. Thermal stress analysis for three-way catalysis was performed based on this temperature distribution. Thermal safety of three-way catalyst was estimated by power law dynamic fatigue life estimation and strength reduction methods for thermal stress.
Keywords
Thermal Durability; Dynamic Fatigue; Fluid-Structure Interaction; Ceramic Catalyst Substrate;
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Times Cited By KSCI : 4  (Citation Analysis)
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