A gas turbine combustion system comprising - a central axis and a radial direction with respect to said central axis; - a first radial inflow swirler having first radial outer intake openings located at a radial outer circumference of the first radial inflow swirler, first radial inner outlet openings located at a radial inner circumference of the first radial inflow swirler, and first flow passages extending from the first radial outer intake openings to the first radial inner outlet openings, each first flow passage including a first angle (α) with respect to the radial direction; - a second radial inflow swirler having second radial outer intake openings located at a radial outer circumference of the second radial inflow swirler, second radial inner outlet openings located at a radial inner circumference of the second radial inflow swirler, and second flow passages extending from the second radial outer intake openings to the second radial inner outlet openings, each second flow passage including a second angle (β) with respect to the radial direction; - where the radial outer circumference of the second radial inflow swirler has a diameter that is smaller than the diameter of the radial inner circumference of the first radial inflow swirler and the second radial inflow swirler is located coaxially with and radially inside an opening formed by the inner circumference of the first radial inflow swirler so that a fluid that exits the outlet openings of the first radial inflow swirler is directed towards the second radial inflow swirler, and - where the first angle (α) has a different sign than the second angle (β) with respect to the radial direction. - a central axis and a radial direction with respect to said central axis; - a first radial inflow swirler having first radial outer intake openings located at a radial outer circumference of the first radial inflow swirler, first radial inner outlet openings located at a radial inner circumference of the first radial inflow swirler, and first flow passages extending from the first radial outer intake openings to the first radial inner outlet openings, each first flow passage including a first angle (α) with respect to the radial direction; - a second radial inflow swirler having second radial outer intake openings located at a radial outer circumference of the second radial inflow swirler, second radial inner outlet openings located at a radial inner circumference of the second radial inflow swirler, and second flow passages extending from the second radial outer intake openings to the second radial inner outlet openings, each second flow passage including a second angle (β) with respect to the radial direction; - where the radial outer circumference of the second radial inflow swirler has a diameter that is smaller than the diameter of the radial inner circumference of the first radial inflow swirler and the second radial inflow swirler is located coaxially with and radially inside an opening formed by the inner circumference of the first radial inflow swirler so that a fluid that exits the outlet openings of the first radial inflow swirler is directed towards the second radial inflow swirler, and - where the first angle (α) has a different sign than the second angle (β) with respect to the radial direction.