Detail publikačního výsledku

Numerical Modelling of Combustion in 1.5 Mw Low-nox Burner

JUŘENA, T.; BĚLOHRADSKÝ, P.; SKRYJA, P.; HUDÁK, I.

Originální název

Numerical Modelling of Combustion in 1.5 Mw Low-nox Burner

Anglický název

Numerical Modelling of Combustion in 1.5 Mw Low-nox Burner

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

combustion, CFD, swirling, non-premixed, NOx, burner

Klíčová slova v angličtině

combustion, CFD, swirling, non-premixed, NOx, burner

Autoři

JUŘENA, T.; BĚLOHRADSKÝ, P.; SKRYJA, P.; HUDÁK, I.

Rok RIV

2017

Vydáno

01.10.2016

Nakladatel

Aidic Servizi, S.r.l.

Místo

Milano, Italy

ISBN

978-88-95608-42-6

Kniha

Chemical Engineering Transactions

ISSN

2283-9216

Periodikum

Chemical Engineering transactions

Svazek

52

Stát

Italská republika

Strany od

1261

Strany do

1266

Strany počet

6

URL

http://www.aidic.it/cet/16/52/211.pdf

BibTex

@inproceedings{BUT132692,
  author="Tomáš {Juřena} and Petr {Bělohradský} and Pavel {Skryja} and Igor {Hudák}",
  title="Numerical Modelling of Combustion in 1.5 Mw Low-nox Burner",
  booktitle="Chemical Engineering Transactions",
  year="2016",
  journal="Chemical Engineering transactions",
  volume="52",
  number="52",
  pages="1261--1266",
  publisher="Aidic Servizi, S.r.l.",
  address="Milano, Italy",
  doi="10.3303/CET1652211",
  isbn="978-88-95608-42-6",
  url="http://www.aidic.it/cet/16/52/211.pdf"
}