: In this study, a new developed flame holder which is designed as a double cone with three holes at the top 
cone to spout the fuel to the combustion zone has been investigated experimentally. The air and fuel have been 
supplied to the combustion area through a triple coaxial pipe.The inner pipe of the coaxial pipe delivers fuel, while 
the middle and outside pipes deliver primary and secondary air to the combustion zone, respectively. A conversion 
diversion channel is constructed on the primary air output to optimize air and fuel mixing by increasing turbulence 
in the primary air. The experiment was carried out in still air under atmospheric circumstances, using the diffusion 
flame concept.The results showed that mixing secondary and primary air in the combustion zone had an effect on 
flame temperatures, flame length, flame width, and emissions.