Heat Transfer Effects on the Performance of an Air Standard Otto Cycle

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dc.contributor.authorDemirpolat, Havva
dc.contributor.authorAteş, Ali
dc.contributor.authorDemirpolat, Süleyman Orkun
dc.contributor.authorKahraman, Ali
dc.date.accessioned2023-07-19T15:51:17Z
dc.date.available2023-07-19T15:51:17Z
dc.date.issued2011en_US
dc.departmentSelçuk Üniversitesi, Teknoloji Fakültesi, Makine Mühendisliği Bölümüen_US
dc.description.abstractThere are heat losses during the cycle of a real engine that are neglected in ideal air standard analysis. In this paper the performance of an air-standard Otto cycle with heat transfer loss and variable specific heats of working fluid is analyzed by using finite-time thermodynamics. Heat transfer from the unburned mixture to the cylinder walls has a negligible effect on the performance for the compression process. Additionally, the heat transfer rates to the cylinder walls during combustion are the highest and extremely important. Therefore, we assume that the compression and power processes proceed instantaneously so that they are reversible adiabatics, and the heat losses during the heat rejection process can be neglected. The heat loss through the cylinder wall is assumed to occur only during combustion and is further assumed to be proportional to the average temperature of both the working fluid and the cylinder wall. The results show that the effects of heat transfer loss and variable specific heats of working fluid on the cycle performance are obvious, and they should be considered in practice cycle analysis. Higher heat transfer to the combustion chamber walls lowers the peak temperature and pressure and reduces the work per cycle and the efficiency. The effects of other parameters, in conjunction with the heat transfer, including combustion constants and intake air temperature, are also reported. The results are of importance to provide good guidance for the performance evaluation and improvement of practical real engines.en_US
dc.identifier.citationDemirpolat, H., Ateş, A., Demirpolat, S. O., Kahraman, A., (2011). Heat Transfer Effects on the Performance of an Air Standard Otto Cycle. Selçuk Üniversitesi Sosyal ve Teknik Araştırmalar Dergisi, (2), 20-28.en_US
dc.identifier.endpage28en_US
dc.identifier.issn2146-7226en_US
dc.identifier.issue2en_US
dc.identifier.startpage20en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12395/48759
dc.institutionauthorDemirpolat, Havva
dc.institutionauthorAteş, Ali
dc.institutionauthorDemirpolat, Süleyman Orkun
dc.institutionauthorKahraman, Ali
dc.language.isoenen_US
dc.publisherSelçuk Üniversitesien_US
dc.relation.ispartofSelçuk Üniversitesi Sosyal ve Teknik Araştırmalar Dergisien_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectOtto cycleen_US
dc.subjectfinite-time thermodynamicsen_US
dc.subjectheat transferen_US
dc.subjectair-standarden_US
dc.titleHeat Transfer Effects on the Performance of an Air Standard Otto Cycleen_US
dc.typeArticleen_US

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