3D Simulation of Diesel Particulate Filter Regeneration with Supplementary Fuel Injection

Hinterberger, Christof; Olesen, Mark; Hoßfeld, Christoph; Kaiser, Rolf

doi:10.4271/2008-01-0443

Cited by 5 publications

(2 citation statements)

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“…Based on this dependence on the local Pe´clet number, the microstructural properties (i.e. the permeability and the porosity) of the soot deposit are directly affected by the diffusion coefficient and the wall velocity, as indicated in equation (12). The effect of the variations in the primary particle size is neglected in this study although the size of the soot aggregate particles could be changed depending on the operating conditions.…”

Section: Microstructural Properties Of the Soot Deposit Layermentioning

confidence: 99%

“…In recent years, the availability of highperformance central processing units (CPUs) at low cost as well as the spread of advanced tools such as parallel computing enables full-scale DPF simulations to be made using the computational fluid dynamics (CFD) method based on realistic multi-dimensional models. [10][11][12] Also, a simulation study adopting the lattice Boltzmann method has been reported for more fundamental understanding of the microscopic behaviours of the gas flow and soot in DPFs. 13,14 Together with the realistic multi-dimensional CFD models, there is also a considerable need for simple DPF models for applications to real-time system-level analysis in after-treatment system control, overall vehicle optimization, etc.…”

Section: Introductionmentioning

confidence: 99%

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A methodology for estimating the permeability of a soot deposit in a wall-flow diesel particulate filter

Wang¹

2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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An estimation of the realistic permeability of a soot deposit layer accumulated in a wall-flow diesel particulate filter was performed in this study. A unique contribution of this work is that the current methodology is highly applicable to the real-world design and development processes of diesel particulate filters. To conduct baseline simulation, a onedimensional numerical model describing the behaviours of the exhaust gas and soot within a diesel particulate filter was constructed, employing the well-known single-channel approach. On the basis of this in-house model, the microstructural properties of a soot deposit layer were calibrated by finding the best fit to the measurement data adopted from the open literature. For the optimal applicability of the proposed methodology, the permeability of the deposit is modelled as a variable which depends on the temperature and the average wall velocity, while the porosity is constant. The current model and methodology were validated by comparison with the measurement data for pressure drops through diesel particulate filters. In particular, to boost the practical implementation of the current methodology, a map of the permeability of the soot deposit was created as a function of the operating conditions. In the last part of this study, the pressure drop characteristics through a diesel particulate filter under various operating conditions were examined using an analysis of the breakdown of the individual pressure drop mechanisms.

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Section: Microstructural Properties Of the Soot Deposit Layermentioning

confidence: 99%