Quantitative Assessment of Burner Flame Stability Through Digital Image Processing

Flame stability is a well-known problem in the power industry where low quality fuel fired and combustion conditions change rapidly. Unstable flames often lead to lower efficiency, higher pollutant emissions, other operational problems. Although there are many methods available for flame monitoring characterisation, very few suitable monitoring. This paper presents method quantification of by introducing term called index through digital imaging image processing. combines variability several characteristic parameters flame. The premixed methane-air equivalence ratio ranging from 0.36 2.17 methane-biomass ten biomass fuels measured on laboratory-scale test rig. For purpose comparison also terms oscillation frequency with two earlier methods. Results show that correlation coefficient between greater than 0.89, indicating characterises stability. In addition, more sensitive variation its requires shorter data length. proposed outperforms methods, although latter summation or mean-square calculation. Unlike determined using capable quantifying regardless conditions.