Double-walled flame tube of a high-temperature continuous combustion chamber

摘要

The utility model relates to combustion chambers of gas turbine engines, gas turbines and other power plants, in particular, to flame tubes of high-temperature continuous combustion chambers. The essence of the utility model consists in the fact that a double-walled flame tube of a continuous combustion chamber containing an annular bearing wall and shielding wall segments installed on its inner surface with rows of through sloped sloped holes located in segments in the transverse direction relative to the pipe axis of parallel walls with a given angle tilt relative to the axis of the shielding wall, connected at opposite edges to each other by semicircular sections, and located along a helical line relative to the surface of the shielding wall segments, and the angle of the helix for the slotted holes of the row located at the inlet of the flame tube is selected in the range from 40 ° to 60 °, the ascent angle of the helix for the slotted holes of each successive row is less than the helix angle of the previous row of slotted holes by 1.5-2.5 °, and the ascent angle of the helix for the slotted holes of the row located at the outlet of the flame tube is selected in the range zone from 0 to 20 °. The technical result of the utility model consists in the realization of its purpose, i.e. in the creation of a double-walled flame tube of a combustion chamber of continuous operation, which provides an increase in the efficiency of the convective-film cooling system of the flame tube by forming the direction of the flow of cooling air flowing out of the slotted holes close to the direction of the swirling flow of combustion products. 5 ill.