Optimized Filter Design and Selection Criteria for Continuously Regenerating Diesel Particulate Traps

Konstandopoulos, Athanasios G.; Skaperdas, Evangelos; Warren, James P.; Allansson, Ronny

doi:10.4271/1999-01-0468

Cited by 79 publications

(38 citation statements)

References 6 publications

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“…Based on previous work in the area 30,35,40,43,49,50 , the flow resistance of a clean DPF as expressed by its pressure drop can be very accurately described by totalling the individual pressure drop contributions, shown in Fig. 6.…”

Section: Clean Filtersmentioning

confidence: 99%

“…As flow in porous media represents a challenging area of fluid mechanics, initial approaches 39,40,41) have employed so-called unit-cell models where the porous filter wall is approximated as a collection of "cells", each hosting an object of simple geometry (a sphere for granular filters and a cylinder for fibrous filters). In these studies, it was shown that the classic filtration theory employing the concept of the "unit collector" (spheres for extruded filters and cylinders for fibrous and foamy structures) can give a good estimate of the size-specific collection efficiency of "clean" DPFs with respect to solid particles.…”

Section: ) Filtration Theor Ymentioning

confidence: 99%

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Update on the Science and Technology of Diesel Particulate Filters

Konstandopoulos

Papaioannou²

2008

KONA

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Section: Clean Filtersmentioning

confidence: 99%

Section: ) Filtration Theor Ymentioning

confidence: 99%

Update on the Science and Technology of Diesel Particulate Filters

Konstandopoulos

Papaioannou²

2008

KONA

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“…Por lo tanto, para su cálculo se hace uso de una correlación para flujo totalmente desarrollado en canales cuadrados corrigiéndose el factor de fricción por ser la pared porosa [53,54]. Así la pérdida de presión por fricción en un canal cuadrado se calcula con la ecuación 2.21 [55,56]:…”

Section: Proceso De Pérdida De Presiónunclassified

“…Estado del arte en el modelado de filtros de partículas Diesel de pared. Los desarrollos posteriores persiguen bien ampliar las condiciones de aplicación del modelo [42,51,56,62] o bien aplicarlo directamente como herramienta auxiliar para acoplar diferentes propuestas destinadas al estudio del proceso de filtrado y de la regeneración [63][64][65][66].…”

Section: Otros Modelos 1d De Filtros De Partículas Diesel De Flujo Deunclassified

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Contribución al modelado termofluidodinámico de filtros de partículas Diesel de flujo de pared

Cabrera¹

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Producte d'estos treballs s'obtenen un conjunt de ferramentes computacionals que permeten el càlcul termo-fluid-dinàmic dels filtres de partícules Dièsel de flux de paret en qualsevol condició de funcionament del motor. AbstractDespite the development of Diesel particulate filters began in the eighties, it has not been till the recent years when the use of these systems has became widely spread as a technological solution to reduce particulate emissions. This is due to the continuously increasing restrictions of present and future emission control regulations which are close to the technological limit of other type of solutions based on the combustion process control.This renewed interest by Diesel particulate filters demands further experimental and theorical research in order to optimise filter performance as well as engine matching. From the theorical point of view, this double objective can be resolved with the use of a unique one-dimensional computational tool: wave action models. They are widely used in the study of air management in internal combustion engines. To adapt and extend their use for after-treatment systems analysis is needed the development of specific tools; chemical species transport through the engine or optimisation of the calculation methodology in order to reduce the computational cost are the main aspects to be dealt with. Thus, the study converges towards a wave action model with the ability to calculate every aspect of the physical and chemical processes taking place in after-treatment devices.On the other hand, a key aspect is to grant the model with enough flexibility so that it can carry out analysis on any type of engine exhaust architecture, ensuring a correct interaction between the particulate filter and the rest of the engine components. It is therefore convenient to treat the flow in the particulate filter as unsteady, one-dimensional, compressible and non-homoentropic. These are the basic characteristics of the model presented in this work, which allows the radial discretization of the monolith in as many channel rings as required solving a pair of inlet-outlet channels in each of them.The model undergoes an experimental validation of progressive complexity: cold, steady flow offering optimal operation conditions for the development of methodologies aimed at the characterisation of the porous media; cold, pulsating flow which allows to show the capacity of the model to reproduce the dynamics of the unsteady and compressible flow; and lastly, typical engine hot, pulsating flow which requires the development of an additional heat transfer sub-model specifically adapted to the characteristics of wall-flow monoliths.As a product of this work, a set of computational tools are obtained which allow the thermo-fluid-dynamic calculation of wall-flow Diesel particulate filters under any engine operation condition.A mis padres, y a Natalia. AgradecimientosQuien bien me conoce es consciente de que son estas palabras las que más me pesan, por la importancia que para mí tiene agradecer co...

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