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Flameless combustion - state of art

Szymczyk J., Olszewski P.

Archivum Combustionis

2016

Vol. 36 nr 1

13--36

Fossil fuel combustion, mainly natural gas, is one of the most common heat source used in high-temperature industrial processes (metallurgy, glass industry). Alternative energy sources or total elimination of fossil fuels are not achievable at our current knowledge and technology development stage. Therefore, optimization of combustion processes is a one of a possible ways for reduction of emission and fossil fuels consumption. In the recent years, a homogenous combustion became the subject of researchers’ interest. This type of combustion is determined by flameless fuel oxidation, what causes more uniform temperature distribution within the reacting zone. This way, high temperature zones are eliminated and simultaneously the NOx production is reduced. The aim of this review is presentation of already posted research related to the homogenous combustion as an alternative heat source for existing industrial applications.

Flameless oxidation at the GT26 gas turbine: numerical study via full chemistry

Ochrymiuk T., Badur J.

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

2001

Vol. 5, No 2

239-246

Sequential combustion was first applied to gas turbines more than 40 years ago, and almost half of these early machines are still operating. This form of oxidation leads to the flame-less combustion at a second chamber. In GT26, the second stage combustor has 24 SEV burners which are similar in action to the well known ABB EV burner. In this paper, a 3D numerical simulation of the first EV combustor and the second SEV-combustor are performed for normal operating conditions (exhaust mass flow 542 kg/s, exhaust temperature 610 C). Physical modelling of the flame-less oxidation is based on an original implementation of the Gri-Mech mechanism (325 chemical reactions) into the Fluent 5.4. Precise estimation of NOx emission and other pollutants has been done.