Nonlinear time series analysis from large eddy simulation of an internal combustion engine

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Keskinen, Jukka-Pekka
dc.contributor.author Vuorinen, Ville
dc.contributor.author Kaario, Ossi
dc.date.accessioned 2016-01-07T10:01:36Z
dc.date.available 2016-01-07T10:01:36Z
dc.date.issued 2016
dc.identifier.citation Keskinen, Jukka-Pekka & Vuorinen, Ville & Kaario, Ossi. 2016. Nonlinear time series analysis from large eddy simulation of an internal combustion engine. International Journal of Heat and Fluid Flow. Volume 57. 79-90. ISSN 0142-727X (printed). DOI: 10.1016/j.ijheatfluidflow.2015.11.009. en
dc.identifier.issn 0142-727X (printed)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/19351
dc.description Julkaisun kokoteksti on luettavissa vain Aalto-tunnuksilla. fi
dc.description Please note that access to the fulltext is limited to Aalto staff and students. en
dc.description.abstract Nonlinear time series analysis was applied for the first time to time series obtained from large eddy simulations (LES) of an internal combustion engine (ICE). The aim of the study was to obtain more information about the cycle-to-cycle variation (CCV) in the studied simplified ICE geometry than what is available from standard methods. Phase space reconstructions were created from the time series and then estimates for the largest Lyapunov exponent were calculated. The time delays used in the phase space reconstructions were determined using average mutual information while the proper embedding dimensions were chosen according to the method of false nearest neighbours. Quantitative information on the behaviour of the flow and the CCV was acquired from three-dimensional phase space reconstructions. Introduced modifications to the flow were clearly visible in the phase space reconstructions of energy and dissipation, indicating that these quantities are appropriate for monitoring and analysing the state of the system. The estimates for the largest Lyapunov exponents were positive for almost all time series, indicating chaotic dynamics. The permutation spectrum test was used to confirm the chaoticity of the CCV. The present results indicate that the used methods offer a promising new framework for characterising the CCV from the viewpoint of nonlinear time series analysis. en
dc.format.extent 79-90
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier BV en
dc.relation.ispartofseries International Journal of Heat and Fluid Flow en
dc.relation.ispartofseries Volume 57
dc.rights © 2016 Elsevier BV. This is the post print version of the following article: Keskinen, Jukka-Pekka & Vuorinen, Ville & Kaario, Ossi. 2016. Nonlinear time series analysis from large eddy simulation of an internal combustion engine. International Journal of Heat and Fluid Flow. Volume 57. 79-90. ISSN 0142-727X (printed). DOI: 10.1016/j.ijheatfluidflow.2015.11.009, which has been published in final form at http://www.sciencedirect.com/science/article/pii/S0142727X15001484. en
dc.subject.other Energy en
dc.subject.other Mechanical engineering en
dc.subject.other Physics en
dc.subject.other Technology en
dc.title Nonlinear time series analysis from large eddy simulation of an internal combustion engine en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder Elsevier BV
dc.contributor.school Insinööritieteiden korkeakoulu fi
dc.contributor.school School of Engineering en
dc.contributor.department Energiatekniikan laitos fi
dc.contributor.department Department of Energy Technology en
dc.subject.keyword LES en
dc.subject.keyword chaos en
dc.subject.keyword engine en
dc.subject.keyword time series en
dc.subject.keyword CCV en
dc.identifier.urn URN:NBN:fi:aalto-201601051002
dc.type.dcmitype text en
dc.identifier.doi 10.1016/j.ijheatfluidflow.2015.11.009
dc.contributor.lab Thermodynamics and Combustion Technology en
dc.contributor.lab Termodynamiikka ja polttotekniikka fi
dc.type.version Post print en


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