GAS TURBINE COMBUSTION CHAMBER Russian patent published in 1999 - IPC

FIELD: combustion chambers of gas turbines. SUBSTANCE: gas-turbine combustion chamber working on compressed natural gas at low emissions of nitrogen and carbon oxides has one or set of flame tubes each of which is connected with inner and outer cases and includes mixer connected with wall of flame tube and located in inner cavity of line in way of flow after flame. Mixer consists of at least two envelopes located coaxially relative to wall of flame tube. Envelopes are made in form of truncated cones with slotted passages narrowing towards ends at outlet. Convex side of envelopes and their end faces at outlet of slotted passages are directed in way of flow. Wall of flame tube has holes between envelopes. At least two additional air swirler are mounted in walls of flame tube below in way of flow behind mixer. Outlet of passage of one air swirler is directed in way of flow and outlet of passage of other air swirler is directed opposite flow. Longitudinal axes of passages of both air swirlers are located at angle relative to each other. EFFECT: reduction of contents of NO_x, Co and HC in waste gears. 2 dwg