A combustion burner includes a burner body with a central bore. A swirl generator insert is provided having vanes which impart a swirl pattern, with minimal pressure loss, to an axial flow of forced air passing from an air inlet end though the swirl generator. An annular fuel gas manifold has a plurality of gas jets positioned adjacent to the sidewall at spaced intervals 360 degrees around the gas manifold. A mixing chamber is positioned downstream of the gas manifold to mix fuel gas from the gas jets with the air exiting the swirl generator insert to create a fuel/air mixture. A combustion chamber is positioned downstream of the mixing chamber. An igniter passage extends through the burner body to position an igniter downstream of the mixing chamber to ignite the fuel/air mixture entering the combustion chamber.

A combustion burner includes a burner body with a central bore. A swirl generator insert is provided having vanes which impart a swirl pattern, with minimal pressure loss, to an axial flow of forced air passing from an air inlet end though the swirl generator. An annular fuel gas manifold has a plurality of gas jets positioned adjacent to the sidewall at spaced intervals 360 degrees around the gas manifold. A mixing chamber is positioned downstream of the gas manifold to mix fuel gas from the gas jets with the air exiting the swirl generator insert to create a fuel/air mixture. A combustion chamber is positioned downstream of the mixing chamber. An igniter passage extends through the burner body to position an igniter downstream of the mixing chamber to ignite the fuel/air mixture entering the combustion chamber.