Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
SWIRL NUMBER INFLUENCE ON POLLUTANT EMISSIONS IN A TWO PHASE SWIRL COMBUSTOR
Submission Author:
Dener Silva de Almeida , MA
Co-Authors:
Dener Silva de Almeida, Pedro Lacava
Presenter: Dener Silva de Almeida
doi://10.26678/ABCM.ENCIT2018.CIT18-0038
Abstract
This paper deals with an alternative Low-NOx combustor configuration to possible application in gas turbine. The combustion structure allows the conciliation of low NOx emissions and partial oxidation combustion products, as carbon monoxide (CO), unburned hydrocarbons (UHC). The combustion conditions for emissions reduction are reached through the dynamics control of reactants mixing process. This control is obtained by the operational parameters: fuel jet Reynolds number, primary chamber length/diameter and air flow swirl number. Swirling flows are widely used in gas turbines to improve reactants mixture and stabilize the flame, so this work analyses, meanly, the influence of swirl number influence on pollutant emissions, being the other parameters considered. The results that swirl number increase provide CO and UHC reduction. However, NOx higher values are found for high swirl number. Nevertheless, the levels obtained are acceptable. It is also observed that the correct combination of the analyzed parameters is contributory for reducing emissions.
Keywords
Combustion, Gas Turbine, pollutant emissions
