Study on the Stability and Spectral Radiation Characteristics of Coaxial Jet Impinging Flame
Based on the spectral diagnosis technology,the CH4/O2 coaxial jet impact flame is studied,and the influence of the impact distance under different diffusion modes on the spectral radiation characteristics of methane combustion flame is explored,and the flame morphology is characterised by CH*and OH*.The results show that the impact distance has a great impact on the lifting height of the anti-diffusion flame.The diffuse flame does not appear in a lifting state,but there is a phenomenon of de-flame.If the impact distance is too small,the impact occurs in the core area of the flame,and the flame reaction is violent;when the impact distance is too large,the reaction in the flame impact area is not affected by the oxygen flow rate,the impact distance and the equivalent ratio.In the anti-diffusion flame,the impact distance has almost no effect on the peak strength of the attached flame.The peak strength of the diffusion flame is almost unaffected by the peak impact distance.Compared with CH*,OH*is more suitable for characterisation of the structural changes inside the methane-oxygen impact flame.
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