A burner head of a burner for a gas cooktop, a burner, and a gas cooktop are provided. The burner head includes a plurality of supports, where each support includes a support surface for supporting a cooking utensil, the support is further provided with a plurality of gas ports from which gas flows out and forms a flame, and each support has a first working position and a second working position. When the supports are in the first working position, the burner head has a flat upper surface, and the support surfaces of the supports constitute the upper surface, and when the supports are in the second working position, the burner head has a concave surface, and the support surfaces of the supports constitute the concave surface. The shape of the burner head is changeable, so as to adapt to cooking utensils having different bottom outlines.

Provided is a flare tip. The flare tip, according to one embodiment, includes a flare tip enclosure. The flare tip, according to this embodiment, additionally includes two or more flare tip arms extending from the flare tip enclosure, wherein the two are more flare tip arms are largely equidistance from one another, and two or more flare tip orifices located in each of the two or more flare tip arms.

A system and method for burning. The system includes a burner head which has a plurality of burners. The burner head also has a primary manifold coupled to a plurality of burner lines which are coupled to burners. The burners also have a secondary manifold coupled to a burner line. Each secondary manifold is coupled to a plurality of spokes which extend outwardly form the secondary manifold. The spokes have at least one nozzle.

The invention relates to a burner arrangement for using in a single combustion chamber or in a can-combustor comprising a center body burner located upstream of a combustion zone, an annular duct with a cross section area, intermediate lobes which are arranged in circumferential direction and in longitudinal direction of the center body. The lobes being actively connected to the cross section area of the annular duct, wherein a cooling air is guided through a number of pipes within the lobes to the center body and cools beforehand at least the front section of the center body based on impingement cooling. Subsequently, the impingement cooling air cools the middle and back face of the center body based on convective and/or effusion cooling. At least the back face of the center body includes on the inside at least one damper.

A combustor nozzle assembly and a gas turbine combustor including the same are provided. The combustor nozzle assembly includes a central nozzle tube, an inner nozzle tube surrounding the central nozzle tube in a spaced-apart state, an outer nozzle tube surrounding the inner nozzle tube in a spaced-apart state, a pilot fuel injector provided between the central nozzle tube and the inner nozzle tube, and a main fuel injector provided between the inner nozzle tube and the outer nozzle tube.

The present invention reduces the concentration of thermal stress on a burner. A gas turbine combustor receiving compressed air from a compressor, mixing the compressed air with a fuel, burning the mixture to generate a combustion gas, and supplying the combustion gas to a turbine. The combustor includes: an inner cylinder internally forming a combustion chamber; an outer cylinder covering the inner cylinder and forming a cylindrical outer circumferential flow path between the inner and outer cylinders to allow the compressed air to flow; and a burner mounted on an end of the outer cylinder, which is positioned on an opposite side to a turbine side, and facing the combustion chamber. The burner includes a cylindrical base frame including a cavity distributing the fuel, and fuel nozzles circularly arranged as viewed from the combustion chamber and connected to the cavity. When viewed from the combustion chamber, slits extending radially are formed in the base frame such that each separate the circumferentially adjacent fuel nozzles from each other.

A cylindrical burner apparatus and method which produce low NO.sub.x emissions and low noise levels without being dependent upon a blower, or natural draft, for providing air flow or flue gas recirculation. A flow of combustion air is induced into an initial tube pass of the burner by discharging a gas fuel from a plurality of discharge ports located in the initial tube pass. At the same time, a flow of recycled flue gas is induced through a bypass duct between a subsequent tube pass of the burner and the initial tube pass by discharging one or more jets of gas fuel through the bypass duct.

A combustor nozzle assembly and a gas turbine combustor including the same are provided. The combustor nozzle assembly includes a central nozzle tube, an inner nozzle tube surrounding the central nozzle tube in a spaced-apart state, an outer nozzle tube surrounding the inner nozzle tube in a spaced-apart state, a pilot fuel injector provided between the central nozzle tube and the inner nozzle tube, and a main fuel injector provided between the inner nozzle tube and the outer nozzle tube.

A cylindrical burner apparatus and method which produce low NO.sub.x emissions and low noise levels without being dependent upon a blower, or natural draft, for providing air flow or flue gas recirculation. A flow of combustion air is induced into the initial tube pass of the burner by discharging a gas fuel from a plurality of discharge ports located in the initial tube pass. At the same time, a flow of recycled flue gas is induced through a bypass duct between a subsequent tube pass of the burner and the initial tube pass by discharging one or more jets of gas fuel through the bypass duct.

A combustor includes: a first cylindrical body which is configured to hold a fuel nozzle extending in an axial line direction and through which air flows toward a downstream side thereof; a second cylindrical body that is connected to a downstream side of the first cylindrical body; and an outer shell that has an inner peripheral surface configured to define an air introduction channel through which air is introduced such that the air reverses course at an upstream end of the first cylindrical body and flows toward the downstream side together with an outer peripheral surface of the first cylindrical body. The inner peripheral surface has an outside narrowing surface that is formed to extend inward in a radial direction toward the upstream end of the first cylindrical body.