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oai:gredos.usal.es:10366/192062026-01-26T09:51:13Zcom_10366_4101com_10366_4055com_10366_3946com_10366_3823col_10366_4102

Curto-Risso, Pedro Luis Medina Domínguez, Alejandro Calvo Hernández, Antonio 2009-10-07T11:05:36Z 2009-10-07T11:05:36Z 2008-11-12 P. L. Curto-Risso, A. Medina, A. Calvo Hernández; Theoretical and simulated models for an irreversible Otto cycle. J. Appl. Phys. 1 November 2008; 104 (9): 094911. https://doi.org/10.1063/1.2986214 http://hdl.handle.net/10366/19206 http://hdl.handle.net/10366/19206 10.1063/1.2986214 [EN]We show in this work that a finite-time-thermodynamics model of an irreversible Otto cycle is suitable to reproduce performance results of a real spark ignition heat engine. In order to test our model we have developed a computer simulation including a two-zone combustion model and compared the evolution of the performance parameters of the simulated engine as functions of therotational speed with those obtained from a simple theoretical scheme including chemical reactions. A theoretical Otto cycle with irreversibilities arising from friction, heat transfer through the cylinder walls, and internal losses properly reproduces simulation results by considering extremetemperatures and mass inside the cylinder as functions of . Furthermore we obtain realistic values for the parameters characterizing global irreversibilities, their evolution with , and a clearer understanding of their physical origin not always well established in theoretical models eng https://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivs 3.0 Unported Termodinámica Ciclo Otto Thermodynamic Otto cycle Theoretical and simulated models for an irreversible Otto cycle info:eu-repo/semantics/article