Abstract
The characteristics of methane-oxygen micro counterflow diffusion flames were experimentally studied. The flame thickness and flame diameter were determined as functions of the inner diameter of burners, the distance between burners and the flow rate of gases. When burners with large inner diameter were used, diffusion flames were observed in small burner distance. The flame thickness and flame diameter decreased as the burner distance became smaller, and they increased as the flow rate became larger. The flame stretch had a great influence on the flame thickness, i.e. the flame thickness decreased monotonously as the flame stretch became larger.
