Stepped swirler for dynamic control

摘要

A swirling device for injecting a medium into a turbine is provided. The swirling device includes a central axis, a central passage in an axial direction along the central axis and an outer perimeter. The swirling device further includes a first duct and a second duct. The first duct and the second duct are adapted for guiding the medium from a region surrounding the outer perimeter to the central passage. The first duct includes a first depth in the axial direction and the second duct includes a second depth in the axial direction. The first depth and the second depth are different.