Abstract
The effect of burner angle on microflame in natural convection field has been investigated in terms of combustion intensity and efficiency based on measurement of the power of CH* emission. When the burner is vertical downward (upward), the maximum combustion intensity is obtained at the flame tip (at the part where flame width is a maximum). The total power of CH* emission of vertically downward flame is remarkably increased compared with that of vertically upward flame. It suggests the increase of the combustion efficiency of vertically downward flames.
