Numerical Modelling of Combustion in 1.5 Mw Low-nox Burner

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F16%3APU122474" target="_blank" >RIV/00216305:26210/16:PU122474 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.aidic.it/cet/16/52/211.pdf" target="_blank" >http://www.aidic.it/cet/16/52/211.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3303/CET1652211" target="_blank" >10.3303/CET1652211</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical Modelling of Combustion in 1.5 Mw Low-nox Burner

Popis výsledku v původním jazyce

Results from CFD simulations of swirling non-premixed gas flame using a low-NOx gas burner are presented and compared to experimental data measured during a testing campaign in a semi-industrial water-cooled combustion chamber. It is shown, how results are sensitive to the mixing rate constant of EDM, which is employed in a simulation of swirling turbulent diffusion flame. Specifically, temperatures are overestimated with the constant being set to 4 (the default value in Ansys Fluent), which leads to false prediction of NOx formation. Temperature peaks are reduced by lowering the mixing rate constant. An acceptable agreement with measured outlet and peak flame temperatures is achieved, when the constant is set to 0.6. With this value, however, highly increased concentrations of unburned species are reported at the outlet. Predicted values deviate from the measurements about three orders of magnitude. Based on the concentrations of unburned species and oxygen in the flue gas at the outlet, the best results are obtained with the constant 1.2.

Název v anglickém jazyce

Numerical Modelling of Combustion in 1.5 Mw Low-nox Burner

Popis výsledku anglicky

Results from CFD simulations of swirling non-premixed gas flame using a low-NOx gas burner are presented and compared to experimental data measured during a testing campaign in a semi-industrial water-cooled combustion chamber. It is shown, how results are sensitive to the mixing rate constant of EDM, which is employed in a simulation of swirling turbulent diffusion flame. Specifically, temperatures are overestimated with the constant being set to 4 (the default value in Ansys Fluent), which leads to false prediction of NOx formation. Temperature peaks are reduced by lowering the mixing rate constant. An acceptable agreement with measured outlet and peak flame temperatures is achieved, when the constant is set to 0.6. With this value, however, highly increased concentrations of unburned species are reported at the outlet. Predicted values deviate from the measurements about three orders of magnitude. Based on the concentrations of unburned species and oxygen in the flue gas at the outlet, the best results are obtained with the constant 1.2.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/LO1202" target="_blank" >LO1202: NETME CENTRE PLUS</a><br>

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 statě ve sborníku

Chemical Engineering Transactions

ISBN

978-88-95608-42-6

ISSN

2283-9216

e-ISSN

—

Počet stran výsledku

6

Strana od-do

1261-1266

Název nakladatele

Aidic Servizi, S.r.l.

Místo vydání

Milano, Italy

Místo konání akce

Praha

Datum konání akce

27. 8. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000392209500211