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Experimental measurements of the NOx and CO concentrations operating in oscillatory and non-oscillatory burning conditions |
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| Authors: | Cristiane A Martins Marco A Ferreira |
| Affiliation: | a Departamento de Propulsão, Instituto Tecnológico de Aeronáutica, 12228-210 São José dos Campos, SP, Brazil b Departamento de Energia, Universidade Estadual Paulista, Campus de Guaratinguetá, 12516-410 Guaratinguetá, SP, Brazil c Departamento de Engenharia Mecânica, Universidade de Brasília, 70910-900 Brasília, DF, Brazil d Laboratório Associado de Combustão e Propulsão, Instituto Nacional de Pesquisas Espaciais, 12630-000 Cachoeira Paulista, SP, Brazil |
| Abstract: | The effects of combustion driven acoustic oscillations in carbon monoxide and nitrogen oxides emission rates of a combustor operated with liquefied petroleum gas (LPG) were investigated. Because the fuel does not contain nitrogen, tests were also conducted with ammonia injected in the fuel, in order to study the formation of fuel NOx. The main conclusions were: (a) the pulsating combustion process is more efficient than the non-pulsating one and (b) the pulsating combustion process generates higher rates of NOx, with and without ammonia injection, as shown by CO and NO concentrations as function of the O2 concentration. An increase in the LPG flow rate, keeping constant the air to fuel ratio, increased the acoustic pressure amplitude and the frequency of oscillation. The injection of ammonia had no influence on either pressure amplitude or frequency. |
| Keywords: | NOx formation Pulse combustion |
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