Evaluation of gas radiation models in CFD modeling of oxy-combustion
Artikel i vetenskaplig tidskrift, 2014

Proper determination of the radiation energy is very important for proper predictions of the combustion characteristics inside combustion devices using CFD modeling. For this purpose, different gas radiation models were developed and applied in the present work. These radiation models vary in their accuracy and complexity according to the application. In this work, a CFD model for a typical industrial water tube boiler was developed, considering three different combustion environments. The combustion environments are air-fuel combustion (21% O-2 and 79% N-2), oxy-fuel combustion (21% O-2 and 79% CO2) and oxy-fuel combustion (27% O-2 and 73% CO2). Simple grey gas (SGG), exponential wide band model (EWBM), Leckner, Perry and weighted sum of grey gases (WSGG) radiation models were examined and their influences on the combustion characteristics were evaluated. Among those radiation models, the EWBM was found to provide close results to the experimental data for the present boiler combustion application. The oxy-fuel combustion characteristics were analyzed and compared with those of air-fuel combustion.

Air combustion

Computational fluid dynamics (CFD)

Oxy-fuel combustion

Gas radiation models

Författare

M. A. Rajhi

King Fahd University of Petroleum and Minerals

R. Ben-Mansour

King Fahd University of Petroleum and Minerals

M. A. Habib

King Fahd University of Petroleum and Minerals

M. A. Nemitallah

King Fahd University of Petroleum and Minerals

Massachusetts Institute of Technology (MIT)

Klas Andersson

Chalmers, Energi och miljö, Energiteknik

Energy Conversion and Management

0196-8904 (ISSN)

Vol. 81 83-97

Ämneskategorier

Energiteknik

DOI

10.1016/j.enconman.2014.02.019