Experimental Study And Numerical Simulation For Low NOx Swirling Burner

The coal is the most important part in Chinese energy structure, which will emit a large amount of nitrogen oxides from burning. environment destruction, serious harm to human health, the deterioration of human living environment become more and more obvious by nitrogen oxides. Compared to all the methods, low NOx combustor has very good competitive advantages from technical maturity, out-efficiency of reducing NOx, and overall costs and the transformation of the latter part of the operation costs.First the cold condition experiment on an archetypal combustor was carried out. We have discussed the effects of the center air, the inter-second air and outer-second air on the back flow field, we have also discussed the effects of the second air on the rigidity of the first air.Then, the theory of the numerical simulation of the theory is introduced, focusing on the standardk -εmodel, RNGk -εmodel, Realizablek -εturbulence model in three models. We found that RNG k -εmodel is the most reasonable by contrast simulation and experimental results. In order to verify the reasonableness of RNGk -εmodel, the paper also carried out simulation of another burner and found that the RNGk -εmodel is the most reasonable.Thirdly, the RNGk -εmodel was used for numerical simulation to the burner, we discussed the burner's aerodynamic characteristics at different inter-second air, outer-second air, first air outlet, and center bluff body.Finally, the hot condition experiment was carried out on a horizontal single-furnace system. Fourier Transform Infrared Spectroscopy (FTIR)was used to quantify NO, CO, CO₂, O₂ and temperature.