A Thermal Analysis of Active-flow Control on Diesel Engine Aftertreatment

2004-01-3020

10/25/2004

Event
2004 Powertrain & Fluid Systems Conference & Exhibition
Authors Abstract
Content
One-dimensional transient modeling techniques are adapted to analyze the thermal behavior of lean-burn after-treatment systems when active flow control schemes are applied. The active control schemes include parallel alternating flow, partial restricting flow, and periodic flow reversal (FR) that are found to be especially effective to treat engine exhausts that are difficult to cope with conventional passive flow converters. To diesel particulate filters (DPF), lean NOx traps (LNT), and oxidation converters (OC), the combined use of active flow control schemes are identified to be capable of shifting the exhaust gas temperature, flow rate, and oxygen concentration to more favorable windows for the filtration, conversion, and regeneration processes. Comparison analyses are made between active flow control and passive flow control schemes in investigating the influences of gas flow, heat transfer, chemical reaction, oxygen concentration, and converter properties. Some of the simulation results, such as the periodic flow reversal results, are largely in agreement with the previous empirical observation.
Meta TagsDetails
DOI
https://doi.org/10.4271/2004-01-3020
Pages
14
Citation
Zheng, M., Reader, G., Wang, D., Zuo, J. et al., "A Thermal Analysis of Active-flow Control on Diesel Engine Aftertreatment," SAE Technical Paper 2004-01-3020, 2004, https://doi.org/10.4271/2004-01-3020.
Additional Details
Publisher
Published
Oct 25, 2004
Product Code
2004-01-3020
Content Type
Technical Paper
Language
English