초록 ▼

The invention relates to a premix burner for burning fuel with air to combustion gas, in particular within a combustion turbine. Profiling means are provided for profiling the mass stream of the combustion air in a direction radial to an annular shaped air channel in order to generate a radial varyi

The invention relates to a premix burner for burning fuel with air to combustion gas, in particular within a combustion turbine. Profiling means are provided for profiling the mass stream of the combustion air in a direction radial to an annular shaped air channel in order to generate a radial varying fuel/air mixture that stabilises the combustion. Accordingly, the invention also relates to a gas turbine and a process for burning fuel in air.

대표청구항 ▼

1. A premix burner comprising:an annular air channel for guidance of combustion air along a flow direction; and a fuel inlet for feeding fuel into said combustion air, wherein a profiling means is located in said air channel upstream of said fuel inlet for profiling the mass stream of said combustio

1. A premix burner comprising:an annular air channel for guidance of combustion air along a flow direction; and a fuel inlet for feeding fuel into said combustion air, wherein a profiling means is located in said air channel upstream of said fuel inlet for profiling the mass stream of said combustion air in a direction perpendicular to said flow direction, wherein according to said profiling, a fuel density downstream said fuel inlet varies along every radial direction through said annular air channel. 2. A burner according to claim 1, wherein the profiling means is a perforated, annular shaped metal plate, wherein every hole of said plate has a respective hole area, thereby forming a hole area density of said metal plate and wherein said hole area density varies in a radial direction.3. A burner according to claim 2, wherein the hole area density increases in an outward radial direction.4. A burner according to claim 1, wherein the profiling means is a grid.5. A burner according to claim 1, wherein the profiling means is a sieve.6. A burner according to claim 1, wherein the profiling is such that said mass stream of said combustion air increases in an outward radial direction.7. A burner according to claim 1, wherein the annular air channel encircles a central diffusion burner.8. A gas turbine, with a premix burner, wherein the premix burner comprising:an annular air channel for guidance of combustion air along a flow direction; and a fuel inlet for feeding fuel into said combustion air, wherein a profiling means is located in said air channel upstream of said fuel inlet for profiling the mass stream of said combustion air in a direction perpendicular to said flow direction, wherein according to said profiling, a fuel density downstream said fuel inlet varies along every radial direction through said annular air channel. 9. A process for burning fuel in air comprising:guiding air through an annular channel of a premix burner; profiling the mass stream of said air in such a way that the mass stream varies along every radial direction through said annular air channel; feeding fuel into said profiled air stream at a fuel inlet, thereby generating a fuel/air mixture with varying fuel density along every radial direction through said annular air channel; and igniting and burning said fuel/air mixture. 10. A gas turbine according to claim 8, wherein the profiling means of the burner is a perforated, annular shaped metal plate, wherein every hole of said plate has a respective hole area, thereby forming a hole area density of said metal plate and wherein said hole area density varies in a radial direction.11. A gas turbine according to claim 10, wherein the hole area density increases in an outward radial direction.12. A gas turbine according to claim 8, wherein the profiling means is a grid.13. A gas turbine according to claim 8, wherein the profiling means is a sieve.14. A gas turbine according to claim 8, wherein the profiling is such that said mass stream of said combustion air increases in an outward radial direction.15. A gas turbine according to claim 8, wherein the annular air channel encircles a central diffusion burner.