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Study on Transient Analysis for Flow Characteristics in DPF  

Shin, Dong-Won (Department of Mechanical Engineering, Hannam University)
Yoon, Cheon-Seog (Department of Mechanical Engineering, Hannam University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.18, no.1, 2010 , pp. 131-138 More about this Journal
Abstract
Because real flow of engine exhaust is very hot and highly transient, it may cause thermal and inertial loads on catalyzed filters in DPF. Transient and detailed flow and thermal simulations are necessary in this field. To assess the importance of time dependent phenomena, typical cone-type configuration such as an underbody DPF is selected for steady and transient analysis. User defined functions of FLUENT by sinusoidal inlet velocities are written and integrated with main solver for realistic simulation. Also, 4-cylinder and 6-cylinder engines for 3,000 L class are considered for the dynamic exhaust effect of engine type. Key parameters to understanding of catalyst performance and durability issues such as flow uniformity index and peak velocity are investigated. Also, pressure drop for engine power are considered. From the simulation results for three different cases, proper approach is recommended.
Keywords
Transient analysis; UDF(User Defined Functions); DPF(Diesel Particulate Filter Trap); Sinusoidal inlet velocity; Pressure drop; Flow uniformity index; Peak velocity; CFD(Computational Fluid Dynamics);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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