Assessment of NOx emissions of the Scimitar engine at Mach 5 based on a thermodynamic cycle analysis

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dc.authorid0000-0002-0428-3197en_US
dc.contributor.authorTanbay, Tayfun
dc.contributor.authorUca, Muhammed Biqar
dc.contributor.authorDurmayaz, Ahmet
dc.date.accessioned2021-03-20T20:12:20Z
dc.date.available2021-03-20T20:12:20Z
dc.date.issued2020
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Makine Mühendisliği Bölümüen_US
dc.descriptionDurmayaz, Ahmet/0000-0002-6884-8791en_US
dc.description.abstractThe Scimitar engine is a new advanced propulsion system designed to propel the aircraft A2 of the LAPCAT project. It is a hybrid system that utilizes the features of turbofan, ramjet and air-turborocket. Hydrogen and air are used as the fuel and oxidant, respectively, while helium is used to transfer heat from the hot incoming air to the hydrogen in the engine. In this study, we present a thermodynamic cycle analysis of the Scimitar engine for the assessment of NOx emissions. The combustion of fuel is studied in detail with an equilibrium model taking into account various dissociation and formation reactions since high levels of temperatures are achieved in its combustion chamber. The NOx emissions of the engine at Mach 5 and the effects of fuel and air flow rates, cruise speed and altitude on these emissions are presented by solving a nonlinear system of equations formed through our novel thermodynamic model. The results show that the NO emissions of the engine can be diminished significantly by decreasing air flow rate, cruise speed and altitude and by increasing the fuel flow rate. The variations of NO2 emissions with these parameters are similar except the variation with altitude which has an inverse effect as compared to the variation of NO. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.en_US
dc.identifier.doi10.1016/j.ijhydene.2019.02.133en_US
dc.identifier.endpage3640en_US
dc.identifier.issn0360-3199
dc.identifier.issn1879-3487
dc.identifier.issue5en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage3632en_US
dc.identifier.urihttp://doi.org/10.1016/j.ijhydene.2019.02.133
dc.identifier.urihttps://hdl.handle.net/20.500.12885/489
dc.identifier.volume45en_US
dc.identifier.wosWOS:000513987300023en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorTanbay, Tayfun
dc.language.isoenen_US
dc.publisherPergamon-Elsevier Science Ltden_US
dc.relation.ispartofInternational Journal Of Hydrogen Energyen_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectScimitar engineen_US
dc.subjectHydrogen fueled aircraften_US
dc.subjectNOx emissionsen_US
dc.subjectThermodynamic analysisen_US
dc.titleAssessment of NOx emissions of the Scimitar engine at Mach 5 based on a thermodynamic cycle analysisen_US
dc.typeConference Objecten_US

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