Burner for submerged combustion melting

A submerged combustion melter comprising:

• a floor, a roof, and a sidewall structure connecting the floor and roof defining an internal space, at least a portion of the internal space comprising a melting zone;
• and
• one or more internally fluid-cooled submerged combustion burners in either the floor, the roof, the sidewall structure, or any two or more of these, producing combustion gases and configured to emit the combustion gases from a position under a level of, and positioned to transfer heat to and produce, a turbulent molten mass of glass containing bubbles in the melting zone;
• at least one of the combustion burners being an internally fluid-cooled submerged combustion burner comprising:
• a burner body comprising an external conduit and a first internal conduit substantially concentric with the external conduit, the external conduit comprising a first end, a second end, and a longitudinal bore having a longitudinal axis, the first internal conduit comprising a first end, a second end, and a longitudinal bore having a longitudinal axis, the external conduit and first internal conduit forming a first annulus for passing a cooling fluid there between, and a second internal conduit substantially concentric with the external conduit, the second internal conduit comprising a first end, a second end, and a longitudinal bore having a longitudinal axis, and configured to form a second annulus between the first and second internal conduits, the burner body comprising fuel and oxidant inlet ports near the second ends of the conduits;
• and
• a burner tip outer wall operably connected to the burner body at the first end of the external conduit and a burner tip inner wall operably connected to the burner body at the first end of the first internal conduit, the burner tip comprising a generally central flow passage configured to pass a combustible mixture therethrough, the generally central flow passage defined by the burner tip inner wall, where fuel and oxidant intersect in a mixing region at least partially defined by the generally central flow passage through the burner tip, the burner tip further comprising a crown connecting the burner tip inner and outer walls, the crown defined by a pattern of radial alternating ridges and troughs.