Investigation of the surface flame burner functional diagram using chemiluminescence and image analysis

In this study, a fully premixed cylindrical surface flame burner is investigated in a laboratory research. The burner was analyzed in heating capacities 11.74-17.14 kW and its equivalence ratio 0.4-1.6. The results are including two sections of spectroscopy and flame image analysis. In the chemiluminescence section, the maximum heat release from the perforated cylindrical burner is obtained by examining the intensity of hydroxyl radiation in the equivalence Ratio 0.8. In the second part of chemiluminescence, the equivalence ratio is estimated by using the mathbf{O}mathbf{H}^ast/mathbf{C}mathbf{H}^astintensity ratio and mathbf{O}mathbf{H}^ast/mathbf{power} curve fitting from natural flame radiation. The color and state of the flame changed from the equivalence ratio of 1.6 to 0.44, respectively, from green to yellow and red flame, blue and lift-off flame, and eventually blow-off. The satisfactory operation that is stable blue flame without lift off and flash back is observed in the range of 0.7-0.85. This process was performed for six thermal capacities, and its results were collected in a chart called the functional burner diagram. A satisfactory operation can be selected by a functional diagram in different burner powers.