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Computational performance of analytical methods for the acoustic modelling of automotive exhaust devices incorporating monoliths

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Computational performance of analytical methods for the acoustic modelling of automotive exhaust devices incorporating monoliths

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dc.contributor.author Denia, F. D. es_ES
dc.contributor.author Martínez Casas, José es_ES
dc.contributor.author Carballeira, Javier es_ES
dc.contributor.author Nadal, Enrique es_ES
dc.contributor.author Fuenmayor Fernández, Francisco Javier es_ES
dc.date.accessioned 2019-06-02T20:01:21Z
dc.date.available 2019-06-02T20:01:21Z
dc.date.issued 2018 es_ES
dc.identifier.issn 0377-0427 es_ES
dc.identifier.uri http://hdl.handle.net/10251/121433
dc.description.abstract [EN] The acoustic modelling of automotive exhaust devices, such as catalytic converters (CC) and diesel particulate filters (DPF), usually requires the use of multidimensional analytical and numerical techniques. The presence of higher order modes and three-dimensional waves in the expansion and contraction subdomains, as well as sound propagation within the monolith capillary ducts, can be considered through the finite element method (FEM), although this approach is traditionally thought to be very time consuming. With a view to overcome this limitation and to reduce the computational effort of the FEM, alternative modelling techniques are presented in the current work to speed up transmission loss calculations in exhaust devices incorporating monoliths. These approaches are based on the point collocation technique and the mode matching method. As shown in earlier studies, the sound attenuation of an exhaust device incorporating a monolith can be properly predicted if the latter is replaced by a plane wave four-pole transfer matrix providing a relationship between the acoustic fields at both sides of the monolithic region. Therefore, this work combines the presence of multidimensional higher order modes in the expansion and contraction regions with one-dimensional wave propagation within the capillary ducts of the central monolith. The point collocation technique and the mode matching method are applied to the compatibility conditions of the acoustic fields at all the subdomain interfaces to couple the solutions of the wave equation in the corresponding exhaust device subcomponents. For the particular case of rigid circular ducts, Bessel functions are considered as transversal pressure modes. The computational efficiency and accuracy of the results associated with the two analytical modelling techniques presented here are assessed, including the effect of the number of modes and collocation points, as well as their location. All the analytical approaches proposed in this work provide accurate predictions of the device attenuation performance and outperform the computational expenditure of a FE computation. Some differences are found, however, among the various analytical schemes in terms of computational speed and solution accuracy. From the results presented here, the mode matching method is the most efficient technique for the particular configurations under study, mainly due to the possibility of exploiting the orthogonality properties of the transverse pressure modes. es_ES
dc.description.sponsorship This work has been supported by Ministerio de Economia y Competitividad and the European Regional Development Fund (project TRA2013-45596-C2-1-R), as well as Generalitat Valenciana (projects Prometeo/2016/007 and GV/2016/011 of Conselleria d'Educacio, Investigacio, Cultura i Esport). es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation GV/PROMETEO/2016/007 es_ES
dc.relation GV/GV/2016/011 es_ES
dc.relation MINECO/TRA2013-45596-C2-1-R es_ES
dc.relation.ispartof Journal of Computational and Applied Mathematics es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject Acoustic Modelling es_ES
dc.subject Sound Attenuation es_ES
dc.subject Transmission Loss es_ES
dc.subject Automotive Exhaust Device es_ES
dc.subject Monolith es_ES
dc.subject Catalytic Converter es_ES
dc.subject Mode Matching Method es_ES
dc.subject Point Collocation Technique es_ES
dc.subject Transfer Matrix es_ES
dc.subject Finite Element Method es_ES
dc.subject Computational Performance. es_ES
dc.subject.classification INGENIERIA MECANICA es_ES
dc.title Computational performance of analytical methods for the acoustic modelling of automotive exhaust devices incorporating monoliths es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.cam.2017.03.010 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Mecánica y de Materiales - Departament d'Enginyeria Mecànica i de Materials es_ES
dc.description.bibliographicCitation Denia, FD.; Martínez Casas, J.; Carballeira, J.; Nadal, E.; Fuenmayor Fernández, FJ. (2018). Computational performance of analytical methods for the acoustic modelling of automotive exhaust devices incorporating monoliths. Journal of Computational and Applied Mathematics. 330:995-1006. https://doi.org/10.1016/j.cam.2017.03.010 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.cam.2017.03.010 es_ES
dc.description.upvformatpinicio 995 es_ES
dc.description.upvformatpfin 1006 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 330 es_ES
dc.relation.pasarela S\329164 es_ES
dc.contributor.funder Generalitat Valenciana es_ES
dc.contributor.funder Ministerio de Economía, Industria y Competitividad es_ES


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