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Simulation analysis of the unsteady gas flow in the inlet and exhaust manifolds of a multi-cylinder piston internal combustion engine

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dc.contributor.author Kouremenos, DA en
dc.contributor.author Rakopoulos, CD en
dc.contributor.author Andritsakis, EC en
dc.date.accessioned 2014-03-01T02:48:08Z
dc.date.available 2014-03-01T02:48:08Z
dc.date.issued 1992 en
dc.identifier.uri http://hdl.handle.net/123456789/33556
dc.relation.uri http://www.scopus.com/inward/record.url?eid=2-s2.0-0027003935&partnerID=40&md5=923f001aa40f31da6ea9d0656e10ac23 en
dc.subject.other Automobile engine manifolds en
dc.subject.other Computer simulation en
dc.subject.other Differential equations en
dc.subject.other Exhaust systems (engine) en
dc.subject.other Finite difference method en
dc.subject.other Flow of fluids en
dc.subject.other Heat transfer en
dc.subject.other Intake systems en
dc.subject.other Mathematical models en
dc.subject.other Thermodynamics en
dc.subject.other Unsteady flow en
dc.subject.other Inlet and exhaust manifolds en
dc.subject.other Multicylinder piston internal combustion engine en
dc.subject.other Internal combustion engines en
dc.title Simulation analysis of the unsteady gas flow in the inlet and exhaust manifolds of a multi-cylinder piston internal combustion engine en
heal.type conferenceItem en
heal.publicationDate 1992 en
heal.abstract The development of a comprehensive computer program for solving the unsteady flow problem in the inlet and exhaust manifolds of a multi-cylinder piston internal combustion engine is described. The mathematical simulation assumes one dimensional perfect gas flow in the pipes, incorporating wall friction, transient heat transfer rates, area and entropy gradients and variable gas specific heats with temperature and composition. The governing set of hyperbolic equations is transformed, via the characteristic curves mathematical technique, to a group of three slope equations, constituting the two wave characteristics and the pathline curves coupled with their associated compatibility equations, giving the change of the two Riemann variables and entropy along the above curves. The resulting set of differential equations is converted into a finite differences one and is solved on a normalized space and time field to provide the gas state and velocity distributions in all engine pipes, during a working engine cycle. Special attention is paid to setting up the appropriate boundary conditions at the pipes ends. As a validation of the present methodology, the analysis results are compared favourably with experimental data for a spark ignition engine taken from the literature. Using the analysis results, detailed charts are plotted showing the contours variation of gas pressure, temperature and Mach index against engine crank angle (time) and (inlet or exhaust) pipe length, providing useful information for the physical mechanisms involved and aiding towards the correct interpretation of the observed engine behaviour. en
heal.publisher Publ by ASME, New York, NY, United States en
heal.journalName American Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES en
dc.identifier.volume 27 en
dc.identifier.spage 253 en
dc.identifier.epage 270 en


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