An experimental study investigates the flame response characteristics of jet-diffusion flame
and premixed flame. The experiment was conducted while varying the amplitude. Flame
lengths were quantified for OH chemiluminescence measurement and compared with the
result of the flame transfer function. Flame length and flame velocity perturbation were
normalized and compared with the result of the flame transfer function. The comparison
results appear that velocity perturbation and flame length oscillation of premixed flame show …

Recently, most combustion systems are burned under lean conditions, so that combustion
instability phenomenon is easily occurred by this. In order to efficiently control combustion
instability phenomenon, it is necessary to understand the cause of the combustion instability
phenomenon. Combustion instability occurs by overlapping of several instability
phenomena. There are three main factors of several reasons. Among them, main factors of
combustion instability are interactions of acoustic perturbation, velocity perturbation, heat …