A combustor device for a gas turbines engines includes first and a second tubular members telescopically fitted in axially sliding manner to one another with interposition of annular centering and sealing which include at least a centering annular shoulder and a sealing ring arranged coaxial to one another. The sealing ring is axially spaced apart from the centering annular shoulder so that an axial distance between the centering annular shoulder and the sealing ring is greater than a maximum axial movement allowed between the first and said second tubular members.

A cooking appliance is provided, including a cooktop floor and a removable cooking vessel support system on the cooktop floor. The cooking vessel support system includes a support frame configured to support a cooking vessel above a gas burner, the support frame having at least a first arm supporting the gas burner above and spaced apart from the cooktop floor. The support frame includes an internal passageway in fluid communication with the gas burner and configured to draw primary air into the support frame at a location above the cooktop floor and to mix the primary air with an injected gas to provide an air-gas mixture. At least a portion of the internal passageway is formed in the first arm of the support frame such that the air-gas mixture is guided by the internal passageway through the first arm to the gas burner.

A gas turbine combustor is equipped with a nozzle in which an air ejection passage extending along an axis and having an open distal end, and a fuel supply passage extending along the axis and having an open distal end are formed; swirling vanes provided around the nozzle so as to be twisted around the axis of the nozzle; an inner cylinder surrounding an outer periphery of the nozzle and the swirling vanes, and in which compressed air flows through an inside of the inner cylinder toward a downstream side; an outer cylinder which defines an inversion flow path, which inverts the compressed air on an outer periphery of the inner cylinder and introduces the compressed air to the inside of the inner cylinder, between the inner and outer cylinders; and an air introduction pipe having one end connected to a space on an upstream side of the compressed air from the inversion flow path, and the other end connected to the air ejection passage.

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 flare burner for burning combustible waste gases with a manifold, at least two arms, and a plurality of outlets disposed on the plurality of arms. The arms may be perpendicular to the manifold. The arms may also extend outwardly from the manifold. The arms may extend into annuli, to produce oppositely flowing exit gas. A curved dispersing surface may be disposed above the manifold. The arms may comprise a curvilinear shape or include both a linear and a curvilinear portion. The arms are unequal in length and may curve in an opposite direction from each other. The outlets are configured and spaced such that flame is short relative to size of the flare burner.

The invention relates to a premixing method for premixing fuel with air prior to the combustion of a fuel/air mixture to allow burners to be operated at high output and with a good load variation range with stable and reliable operation and low NOx emissions. The method comprises: a) creating a rich fuel/air mixture with a fuel/air ratio above an ignitable fuel/air ratio, b) supplying air to the rich fuel/air mixture to obtain an ignitable fuel/air mixture, and c) swirling the ignitable fuel/air mixture obtained in step a) or b). The invention further relates to a premixing device for performing the method.

A combustion head for burners, comprising an outer tubular body for channeling combustion air, an inner tubular body for channeling a fuel and a diffuser extending between the inner tubular body and the outer tubular body, said diffuser being disc-shaped and defining a slot for passage of the air between said diffuser and the outer tubular body. The outer tubular body has a lip 15 converging towards the main axis at the emission portion so as to define a narrowing of said slot for passage of the combustion air, so that for predefined flow rates of fuel and combustion air, the ratio of the velocity of the exiting fuel to the velocity of the combustion air exiting from the passage slot ranges between 1.8 and 3.

Premixed fuel and air are emitted in a staged fashion from a burner. A header delivers premixed fuel and air to a primary stage of combustion through a first plurality of outlets in communication with the pre-mixer. The same or another header may deliver premixed fuel and air to a secondary stage of combustion through a second plurality of outlets. A tile wall is located on the tile between the first plurality of outlets and the second plurality of outlets. A candelabra piece made of metal may comprise the pre-mixer and the header. In assembly, the candelabra piece may be inserted into the burner tile.

The present disclosure is directed to a dual-fuel fuel nozzle that includes a center body having a tube shape and a gas fuel plenum defined within the center body. The duel-fuel fuel nozzle also includes a ring manifold defining a liquid fuel plenum disposed within the center body. The duel-fuel fuel nozzle further includes a plurality of radially oriented fuel injectors in fluid communication with the liquid fuel plenum. Additionally, the duel-fuel fuel nozzle includes an inner fuel tube extending axially within the center body. A portion of the inner fuel tube extends helically about an axial centerline of the center body. The inner fuel tube is in fluid communication with an axially oriented fuel injector. Furthermore, the duel-fuel fuel nozzle includes first fuel tube extending helically around a portion of the inner fuel tube within the center body. The first fuel tube is fluidly coupled to the fuel plenum.

The present invention relates to a burner head of a burner for a gas cooktop, a burner, and a gas cooktop. 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. In the present invention, the shape of the burner head is changeable, so as to adapt to cooking utensils having different bottom outlines.