The flame at the mouth of the annular tubes through which oxidizer and fuel are supplied is obtained by applying the Shvab-Zeldovich theory. The results reveal that the flame can occur either at oxidizer side or at fuel side. It depends on the parameter ω which is proportional to the ratio of the amount of oxidizer to that of fuel. The result also indicates that the uniform flame height can be obtained either by varying the parameter ω or by adjusting the spacing between the annular tubes. The present result can be applied for a burner design or especially for the determination of the economic structure of the holed briquet in domestic use.