The Effect of the Design Change of the Two-Channel Burner on the Pollutants Emissions

Aeronautical and Space-Rocket Engineering


Аuthors

Baklanov A. V.

Kazan Motor Production Association, 1, Dementyeva str., Kazan, 420036, Russia

e-mail: andreybaklanov@bk.ru

Abstract

Currently, one of the most effective concepts of low-emission fuel combustion is the LPP (Lean-premixed and prevapozised) concept, based on low-temperature (Tflame = 1800–1900 K) combustion of pre-mixed “poor” fuel-air mixture (FAM). This concept envisages careful fuel mixing with the air in the burner prior to its being fed to the combustion zone. It is known that the technical perfection of such burners ensures a successful solution to the problem of the nitrogen oxides and carbon monoxide emissions reduction while maintaining high efficiency and stability of the combustion process. Thus, the research aimed at studying the effect of such burners design on the flame emission characteristics is necessary for development and follow-up of the gas turbine engines combustion chambers, accompliched within the framework of the LPP concept.
The article considers the structure of a two-channel burner of the low-emission gas-turbine engine natural gas running combustion chamber, and presents the results of the study of two burners of various structural embodiments. The basic burner consists of the case and a swirler with a nozzle. The swirler vanes are hollow with the fuel supply orifices on their walls. The swirler contains the expanding central body, where the nozzle with the fuel supplying channels is mounted. The upgraded burner includes the contractor headpiece at the nozzle outlet and a central body of the cylindrical shape. This burner central body is twice as shorter than the basic burner.

Keywords:

dual-channel burner, low-emission combustion chamber, completeness of combustion, emissions of harmful substances

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