Publication detail

Numerical Modelling of Combustion in 1.5 Mw Low-nox Burner

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

Original Title

Numerical Modelling of Combustion in 1.5 Mw Low-nox Burner

Type

conference paper

Language

English

Original Abstract

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.

Keywords

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

Authors

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

Released

1. 10. 2016

Publisher

Aidic Servizi, S.r.l.

Location

Milano, Italy

ISBN

978-88-95608-42-6

Book

Chemical Engineering Transactions

Edition number

52

ISBN

2283-9216

Periodical

Chemical Engineering Transactions

Year of study

52

State

Republic of Italy

Pages from

1261

Pages to

1266

Pages count

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",
  issn="2283-9216",
  url="http://www.aidic.it/cet/16/52/211.pdf"
}