Parametric Study of Inverse Diffusion Flame

Abstract

Diffusion flame is characterized by having a wide flammability range, however the high pollutant gas emissions limits the use of diffusion flame due recent concern about environmental restrictions. Inverse diffusion flame (IDF), on the other hand, has a wide range of flammability, but in the same time it reduces pollutant emissions. For IDF the central fuel jet and the outer air jets are interchanged. The high exchange of momentum increases the shear strain as the fuel is entrained to the higher velocity inner air jet. This leads to better mixing and higher combustion efficiency. In case an outer air jet is introduced to the IDF burner configuration, triple co-axial ports inverse diffusion flame (TPC-IDF) is formed. Accordingly, the fuel jet flows in the annuals between the inner and outer air jet, where the rate of exchange of momentum and shear strain is increased leading to better mixing and higher combustion efficiency. This leads to reduced pollutant gas emissions and more uniform temperature distribution. The scope of the current experimental work is to investigate the effects of