Cleaner emissions! GE gas turbine engine tilt burner patent passed

Gas turbine engines are subject to increasingly stringent emission regulations. In addition, many gas turbine engines that generate electricity, such as marine or industrial gas turbine engines, are derived from aviation gas turbine engines originally designed for aircraft propulsion.

In order to meet strict emission regulations, a combustor assembly for gas turbine engines is required. Such combustor assembly increases the flow path of the combustor and the length of the premixer, while reducing pressure loss, achieving flow uniformity, and improving Backflow margin to improve performance, durability, and emissions output.

Source: US10598380B2

Cleaner emissions, smarter design

GE has developed an inclined combustor for a gas turbine engine. The combustion part includes a combustor assembly, an outer shell, a fuel injector assembly, and an inner shell. The combustor assembly includes an inner liner and an outer liner, which respectively extend at least partially along the length direction and at an acute angle with respect to the longitudinal centerline.

Source: US10598380B2

The combustor assembly also includes a dome assembly extending between the inner liner and the outer liner. The dome assembly, inner liner and outer liner together define a combustion chamber between them. The combustor assembly also includes a baffle assembly that defines a plurality of walls that are coupled to the inner liner and generally surround the outer liner and the dome assembly. At least a part of the diaphragm assembly at least partially extends in a forward direction, and an air chamber is defined between the diaphragm assembly and the dome assembly.

Source: US10598380B2

The housing surrounds the combustor assembly and extends at least partially in the same direction as the combustor assembly. The fuel injector assembly extends through the housing, diaphragm assembly and dome assembly. The inner shell, outer shell, and combustor assembly together define the main flow path in direct fluid communication with the combustion chamber. The main flow path extends at least in a forward direction and a backward direction defined by the inner shell, the outer shell, and the combustor assembly.

The inclined combustor of the gas turbine engine developed by GE increases the flow path of the combustor and the length of the premixer, while reducing pressure loss, achieving flow uniformity, and increasing the return margin to improve performance, durability and emission output (For example, reduced CO emissions).

A major feature of the inclined combustor of the gas turbine engine developed by GE is the inclined or angled combustor. The pressure loss is adjusted by the inclination, and approximately all flow path air (ie, compressor outlet air) is used for the combustor assembly Cooling and combustion, increasing the flow path length while maintaining or reducing the length of the combustor/diffuser assembly, as well as the length of the entire gas turbine engine, or more specifically, the length of the gas generator core.

The whole or part of the burner assembly developed by GE can be3D printing-Additive manufacturing to achieve. Materials include high-strength steel, nickel and cobalt-based alloys or metal or ceramic-based composite materials, or other material combinations. The burner includes a plurality of openings, and the shape is one or more of rectangular, elliptical, circular, etc., and may include one or more combinations of the above-mentioned cross-sectional shapes. The second wall opening may be oval or racetrack-shaped, teardrop-shaped, rectangular, polygonal or rectangular, or a combination of different shapes.

The combustor developed by GE is generally also suitable for turbomachinery, including marine and industrial gas turbine engines, auxiliary power units, and turbofans, turbojet engines, turboprop engines, and turboshaft engines.

Review

Regarding the efficient manufacturing of turbine engine combustors, it was introduced that the Siemens Finspång plant passed3D printing-Additive manufacturing is used in the development, maintenance and production of gas turbines, including the manufacture of SGT-800 gas turbines3D printingBurner parts. According to Siemens, additive-manufactured gas turbine burners have made a decisive contribution to speeding up the development of new technologies. These new technologies help to realize the use of green energy in the operation of gas turbines. In terms of emissions, innovative gas turbine technology is used to meet new global climate smart solutions. For example, Siemens gas turbines have been used to convert traditional coal fuel to modern gas combined cycle power generation, reducing carbon dioxide emissions by about two-thirds. ; Through the use of new gas turbines such as SGT-800, the factory can increase the proportion of hydrogen or biofuels in natural gas fuel, further reducing carbon emissions.

Siemens Finspång plant adopts3D printingManufacture the front-end parts of the SGT-800 gas turbine combustion chamber. In the traditional production process, this part is composed of 13 parts and 18 welding points.And the selected area laser melting applied by Siemens3D printingThe technology provides a wider space for the design and optimization of the burner. The optimized burner has an outer wall and an inner wall of a frame structure. This complex double-wall structure component is finally passed through metal3D printingThe equipment is manufactured at one time, and there is no need to weld several separate parts together.

3D printingThe technology shortens the production cycle of burner components from several months to one or two weeks, and the delivery time can be reduced by up to 90%. In addition, the combustor optimized for additive manufacturing supports higher combustion temperatures and can handle up to 60% of the co-firing of hydrogen and natural gas. Burners manufactured using traditional techniques can only mix a few percent of hydrogen into the air. From this, we can clearly see,3D printingTechnology has created a new track in creating next-generation products, the world’s first one manufactured by GE3D printingThe microporous premixed 9HA gas turbine was introduced into China as early as 2019. This gas turbine is the core component of the Harbin Electric Group’s Tianjin Junliangcheng Power Plant Project. Compared with traditional gas turbines, the 9HA gas turbine has a significant improvement in reducing carbon emissions and improving combustion efficiency. The combined cycle efficiency will be higher than 62%. At the same time, the machine’s peak shaving is flexible, which is also of great help to the stability of the power grid.

(Editor in charge: admin)