Heat transfer modelling in honeycomb wall-flow diesel particulate filters
Heat transfer in wall-flow monoliths has gained in interest because of the widespread adoption of these systems by automotive industry to fulfil soot emission regulations and the importance of heat exchange on the regeneration process control to avoid damaging the monolith. This paper presents a hea...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2012 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/74050 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/74050 |
| Access Level: | acceso abierto |
| Palabra clave: | Aftertreatment Diesel engines Diesel particulate filter Experiments Heat transfer Modelling After-treatment Continuous flows Diesel particulate filters Discretisation Experimental data Flow tests Heat exchange Heat transfer model Heat transfer modelling Outlet duct Porous medium Pressure waves Pulsating flow Radial direction Regeneration process Solid-phase Soot emissions Steady and transient Tangential directions Test campaign Thermal response Unsteady compressible flow Wall-flow monoliths Air filters Automotive industry Fuel filters Heat exchangers Porous materials Soot Wall flow Monolithic integrated circuits Compressible flow Diesel engine Equipment component Exhaust emission Experimental study Filter Flow pattern Heat flux Model validation Numerical model Particulate matter Unsteady flow INGENIERIA AEROESPACIAL MAQUINAS Y MOTORES TERMICOS |
| Sumario: | Heat transfer in wall-flow monoliths has gained in interest because of the widespread adoption of these systems by automotive industry to fulfil soot emission regulations and the importance of heat exchange on the regeneration process control to avoid damaging the monolith. This paper presents a heat transfer model for wall-flow diesel particulate filters coupled with an unsteady compressible flow solver. The heat exchange between the gas and the solid phase is based on a bi-dimensional discretisation of the porous medium both in axial and tangential directions. The monolith can be discretised in the radial direction to account for the heat fluxes towards the environment through the monolith and the canister, which is also coupled with the inlet and outlet ducts of the filter. The model is validated against experimental data obtained in a flow test rig. A test campaign under non-reacting conditions has been conducted to show the capability for thermal response prediction. Tests cover clean and soot loaded monolith, continuous flow under steady and transient thermal conditions, and pulsating flow. In this case, the characteristics of the pressure waves in amplitude and frequency are similar to those that the monolith can undergo depending on its location along the exhaust line. © 2012 Elsevier Ltd. |
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