A premix pilot nozzle includes a tip portion having a downstream surface that extends between a downstream end of an inner wall of the tip portion and a downstream end of an outer wall of the tip portion. The downstream end of the inner wall terminates axially upstream from the downstream end of the outer wall. At least a portion of the downstream surface is curvilinear. The tip portion further comprises a plurality of axially extending premix tubes annularly arranged about the tip portion. Each premix tube defines a premix flow passage through the tip portion. Each premix tube also includes an outlet that is axially offset from the downstream surface.

A premix pilot nozzle includes a tip portion having a downstream surface that extends between a downstream end of an inner wall of the tip portion and a downstream end of an outer wall of the tip portion. The downstream end of the inner wall terminates axially upstream from the downstream end of the outer wall. At least a portion of the downstream surface is curvilinear. The tip portion further comprises a plurality of axially extending premix tubes annularly arranged about the tip portion. Each premix tube defines a premix flow passage through the tip portion. Each premix tube also includes an outlet that is axially offset from the downstream surface.

The present disclosure seeks to provide a metallic burner tile for use in industrial processes such as cracking. The tile is substantially metallic (e.g. more than 80%) with the balance being ceramic coating on surfaces exposed to high temperature. The tile is lighter and more durable than the current ceramic burners.

The present disclosure seeks to provide a metallic burner tile for use in industrial processes such as cracking. The tile is substantially metallic (e.g. more than 80%) with the balance being ceramic coating on surfaces exposed to high temperature. The tile is lighter and more durable than the current ceramic burners.

Submerged combustion burners having a burner body, a burner tip connected thereto. Submerged combustion melters including the burners and methods of using them to produce molten glass. The burner body has an external conduit and first and second internal conduits substantially concentric therewith, forming first and second annuli for passing a cooling fluid therethrough. The burner tip body is connected to the burner body at ends of the external and second internal conduits. The burner tip includes a generally central flow passage for a combustible mixture, the flow passage defined by an inner wall of the burner tip. The burner tip includes a crown portion defining a circumferential concavity.

Submerged combustion burners having a burner body, a burner tip connected thereto. Submerged combustion melters including the burners and methods of using them to produce molten glass. The burner body has an external conduit and first and second internal conduits substantially concentric therewith, forming first and second annuli for passing a cooling fluid therethrough. The burner tip body is connected to the burner body at ends of the external and second internal conduits. The burner tip includes a generally central flow passage for a combustible mixture, the flow passage defined by an inner wall of the burner tip. The burner tip includes a crown portion defining a circumferential concavity.

A fuel nozzle for a gas turbine engine that includes: an elongated centerbody; an elongated peripheral wall formed about the centerbody so to define a primary flow annulus; a primary fuel and air supply in fluid communication with the primary flow annulus; and a pilot nozzle. The pilot nozzle, formed in the centerbody, may have axially elongated air and mixing tubes extending between inlets and outlets defined, respectively, through upstream and downstream faces of the pilot nozzle. A secondary air supply may be communicate with the inlets of the air and mixing tubes. A fuel port may be positioned in the mixing tubes for connecting each to a secondary fuel supply. An uninterrupted sidewall sealing structure in each of the air tubes may segregate an air flow therethrough from the secondary fuel supply. The air and mixing tubes may be configured as canted tubes so to induce a downstream swirling flow.

Disclosed is a gas distributor, including: a nozzle unit formed by joining a pair of nozzle members together such that the nozzle members face each other with a first nozzle gap defined between the nozzle members; and a nozzle assembly in which at least two nozzle units are assembled together in parallel, in which the nozzle gap includes a first flow path formed in parallel in a direction of the nozzle member, and a second flow path extended from the first flow path, formed with a smaller width than a width of the first flow path along a bonded surface, and discharging gas through an end portion of one side of the second flow path, and the second flow path is extended with the first flow path, and is inclinedly provided so that a width is gradually decreased in a portion adjacent to the first flow path.

Disclosed is a gas distributor, including: a nozzle unit formed by joining a pair of nozzle members together such that the nozzle members face each other with a first nozzle gap defined between the nozzle members; and a nozzle assembly in which at least two nozzle units are assembled together in parallel, in which the nozzle gap includes a first flow path formed in parallel in a direction of the nozzle member, and a second flow path extended from the first flow path, formed with a smaller width than a width of the first flow path along a bonded surface, and discharging gas through an end portion of one side of the second flow path, and the second flow path is extended with the first flow path, and is inclinedly provided so that a width is gradually decreased in a portion adjacent to the first flow path.

A burner for a combustion machine, having a pilot burner, which extends in the axial direction, having a nozzle chamber, having a burner region and having a cover plate which is arranged between the nozzle chamber and the burner region and which has an inlet opening, wherein an adapter is arranged, in order to guide air out of the nozzle chamber along a specified flow path in the direction of the combustion region, wherein a flow channel is formed as part of the flow path between the adapter and the cover plate and the adapter has a radially extending, annular section which, together with the cover plate, forms a radial section of the flow channel, in order to cool the cover plate by the air. A combustion machine has such a burner.