Gas turbine combustion chamber

摘要

A gas turbine combustion chamber is provided including a pilot fuel nozzle arranged in the central section of a cylinder that opens at one end towards a combustion chamber. The pilot fuel nozzle includes a fuel nozzle and a cylindrical outer casing around the outer circumference of the fuel nozzle. A pilot swirl element is arranged between fuel nozzle and outer casing, including a plurality of main burners which are arranged around the pilot fuel nozzle, and including a pilot cone having an inner side and an outer side. The pilot cone is arranged on the pilot fuel nozzle and an opening, such that a pilot flame is formed in the pilot cone by mixing air and pilot fuel in order to ignite a fuel injected by the main burners, wherein the pilot cone has turbulence generators on the inner side and/or outer side thereof.

主权项

1. A gas turbine combustion chamber comprising:
a pilot fuel nozzle arranged in a central section of a cylinder which opens at one end towards a combustion chamber, the pilot fuel nozzle comprises:
a fuel nozzle and a cylindrical outer casing around the outer circumference of the fuel nozzle and at a radial distance therefrom,a pilot swirl element arranged between fuel nozzle and outer casing; and a pilot cone having an inner side and an outer side, wherein a plurality of main burners are arranged around the pilot fuel nozzle with respect to the radial direction, wherein the pilot cone is arranged on the pilot fuel nozzle at a combustion chamber end and having an opening at the combustion chamber end, such that a pilot flame is formed in the pilot cone by mixing air and pilot fuel in order to ignite a fuel injected by the plurality of main burners, wherein the pilot cone includes a plurality of turbulence generators on its inner side and/or its outer side, wherein the plurality of turbulence generators are trapezoidal and/or triangular strips which are arranged at an opening of the pilot cone over the entire circumference of the opening of the pilot cone, and wherein the trapezoidal and/or triangular strips are arranged on the pilot cone alternately at an angle of +/−30°.