Dual Fuel Combustion Model for a Large Low-Speed 2-Stroke Engine

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F16%3A00308065" target="_blank" >RIV/68407700:21220/16:00308065 - isvavai.cz</a>

Výsledek na webu

<a href="http://papers.sae.org/2016-01-0770" target="_blank" >http://papers.sae.org/2016-01-0770</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4271/2016-01-0770" target="_blank" >10.4271/2016-01-0770</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dual Fuel Combustion Model for a Large Low-Speed 2-Stroke Engine

Popis výsledku v původním jazyce

A quasi-dimensional dual fuel combustion model is proposed for a large 2-stroke marine engine. The introduced concept accounts for both diffusion combustion of the liquid pilot fuel and the flame front propagation throughout the gaseous premixed charge. For the pilot fuel case a common integral formulation defines the ignition delay whereas a time scale approach is incorporated for the combustion progress modeling. In order to capture spatial differences given by the scavenging process and the admission of the gaseous fuel, the cylinder volume is discretized into a number of zones. The laws of conservation are applied to calculate the thermodynamic conditions and the fuel concentration distribution. Subsequently, the ignition delay of the gaseous fuel-air mixture is determined by the use of tabulated kinetics and the ensuing oxidation is described by a flame velocity correlation. The development of particular sub-models is closely linked to corresponding 3D-CFD investigations whereas the resulting burn rates and pressure traces are validated against the experimental engine data. Furthermore, the model implementation into a commercial 1D simulation tool allows performing full cycle calculations and thus facilitates utilization for future engine development and optimization process.

Název v anglickém jazyce

Dual Fuel Combustion Model for a Large Low-Speed 2-Stroke Engine

Popis výsledku anglicky

A quasi-dimensional dual fuel combustion model is proposed for a large 2-stroke marine engine. The introduced concept accounts for both diffusion combustion of the liquid pilot fuel and the flame front propagation throughout the gaseous premixed charge. For the pilot fuel case a common integral formulation defines the ignition delay whereas a time scale approach is incorporated for the combustion progress modeling. In order to capture spatial differences given by the scavenging process and the admission of the gaseous fuel, the cylinder volume is discretized into a number of zones. The laws of conservation are applied to calculate the thermodynamic conditions and the fuel concentration distribution. Subsequently, the ignition delay of the gaseous fuel-air mixture is determined by the use of tabulated kinetics and the ensuing oxidation is described by a flame velocity correlation. The development of particular sub-models is closely linked to corresponding 3D-CFD investigations whereas the resulting burn rates and pressure traces are validated against the experimental engine data. Furthermore, the model implementation into a commercial 1D simulation tool allows performing full cycle calculations and thus facilitates utilization for future engine development and optimization process.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JT - Pohon, motory a paliva

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

2016

Kód důvěrnosti údajů

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

Název periodika

Society of Automotive Engineers Technical Paper Series

ISSN

0148-7191

e-ISSN

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Svazek periodika

2016

Číslo periodika v rámci svazku

01

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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