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A view on the internal consistency of linear source identification for I.C. engine exhaust noise prediction

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A view on the internal consistency of linear source identification for I.C. engine exhaust noise prediction

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dc.contributor.author Macian Martinez, Vicente es_ES
dc.contributor.author Torregrosa, A. J. es_ES
dc.contributor.author Broatch, A. es_ES
dc.contributor.author Niven, P.C. es_ES
dc.contributor.author Amphlett, S.A. es_ES
dc.date.accessioned 2015-05-28T11:20:46Z
dc.date.available 2015-05-28T11:20:46Z
dc.date.issued 2013-04
dc.identifier.issn 0895-7177
dc.identifier.uri http://hdl.handle.net/10251/50903
dc.description.abstract [EN] Considerable efforts have been devoted to the development of predictive models that, from a certain set of data related to an engine, and making use of an adequate representation of the effect of the silencing elements, provide an estimate of the exhaust noise emitted. Such models should allow for the consideration of the engine and its interaction with the exhaust system. This is properly achieved by gas-dynamic models, which are becoming the standard, but linear models solved in the frequency domain and representing the engine as a linear time-invariant source may still play a role in exhaust system design, as the engine is treated as a black box. Such a representation is very attractive for engine manufacturers, since it gives the possibility to provide data on the engine without any possibility to trace back to its real characteristics. In order to provide additional criteria for the suitability of the application of a linear time-invariant representation to an engine exhaust, in this paper a multi-load method has been used to extract source characteristics from gas-dynamic simulation results. The details of the method, in which the resulting over-determined system is solved by fitting the values of the source parameters in a least-squares sense, are described, and different approaches are used in order to check the internal consistency of the source representation: the identification of pressure and velocity sources, and the application of the least-squares criterion to the modulus or to the real and imaginary parts separately. In particular, eight different determinations of the source impedance are obtained and, considering the application of the formalism to an engine exhaust, the differences observed provide a suitable criterion for the evaluation of the suitability of the representation and of the particular set of loads chosen. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Mathematical and Computer Modelling es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Linear source es_ES
dc.subject Source strength es_ES
dc.subject Source impedance es_ES
dc.subject Identification es_ES
dc.subject Least squares es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title A view on the internal consistency of linear source identification for I.C. engine exhaust noise prediction es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.mcm.2011.12.018
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Máquinas y Motores Térmicos - Departament de Màquines i Motors Tèrmics es_ES
dc.description.bibliographicCitation Macian Martinez, V.; Torregrosa Huguet, AJ.; Broatch, A.; Niven, P.; Amphlett, S. (2013). A view on the internal consistency of linear source identification for I.C. engine exhaust noise prediction. Mathematical and Computer Modelling. 57(7-8):1867-1875. doi:10.1016/j.mcm.2011.12.018 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.mcm.2011.12.018 es_ES
dc.description.upvformatpinicio 1867 es_ES
dc.description.upvformatpfin 1875 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 57 es_ES
dc.description.issue 7-8 es_ES
dc.relation.senia 233912


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