Simulation of Gas Exhaustion from a Combustion Chamber of a Reciprocating Engine

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Simulation of Gas Exhaustion from a Combustion Chamber of a Reciprocating Engine

Popis výsledku v původním jazyce

The document deals with a numerical simulation of a flow leaving the combustion chamber of a four-stroke engine. The problem has been solved with an in-house numerical code, based on finite volume method. The flow model is simplified to an ideal gas, neglecting all the flow chemistry. The flow has been described by a set of Reynolds-Averaged Navier-Stokes equations, together with equations of a turbulence model. The AUSM+up scheme has been used. Spatial accuracy of the scheme has been improved by the use of linear reconstruction with a limiter. Contours of both the valve and the exhaust channel contain several sharp corners causing flow separations inside the domain observed. These recirculations affect strongly the flow pattern in a pipe. Several geometrical configurations of the exhaust pipe have been tested, in order to study the influence of geometry detailness. The contribution presents several actual results revealing the flow structure.

Název v anglickém jazyce

Simulation of Gas Exhaustion from a Combustion Chamber of a Reciprocating Engine

Popis výsledku anglicky

The document deals with a numerical simulation of a flow leaving the combustion chamber of a four-stroke engine. The problem has been solved with an in-house numerical code, based on finite volume method. The flow model is simplified to an ideal gas, neglecting all the flow chemistry. The flow has been described by a set of Reynolds-Averaged Navier-Stokes equations, together with equations of a turbulence model. The AUSM+up scheme has been used. Spatial accuracy of the scheme has been improved by the use of linear reconstruction with a limiter. Contours of both the valve and the exhaust channel contain several sharp corners causing flow separations inside the domain observed. These recirculations affect strongly the flow pattern in a pipe. Several geometrical configurations of the exhaust pipe have been tested, in order to study the influence of geometry detailness. The contribution presents several actual results revealing the flow structure.

Druh

D - Stať ve sborníku

CEP obor

BK - Mechanika tekutin

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the Fifth Conference on Computation Fluid Dynamics ECCOMAS CFD 2010

ISBN

978-989-96778-1-4

ISSN

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e-ISSN

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Počet stran výsledku

13

Strana od-do

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Název nakladatele

Instituto Superior Técnico, Technical University of Lisbon, National Civil Engineering Laboratory

Místo vydání

Lisbon

Místo konání akce

Lisabon

Datum konání akce

14. 6. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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