ANNULAR COMBUSTION CHAMBER OF GAS TURBINE ENGINE AND METHOD OF WORKING PROCESS IMPLEMENTATION Russian patent published in 2017 - IPC F23R3/46 F23R3/30 

FIELD: machine engineering.

SUBSTANCE: annular combustion chamber of the gas turbine engine contains an outer and an inner case with an inlet and an outlet, an annular flame tube, prechambers, spark plugs installed in the flame tube. The annular flame tube consists of an upper and a lower shells connected to each other by the front wall of the combustion chamber. The prechambers are installed in one plane on the front wall of the combustion chamber in two tiers. Each prechamber is designed as a vortex countercurrent combustion chamber. The central axes of the prechambers located on different tiers of the combustion chamber converge at one circumference in the plane of the normal central axis of the annular channel of the flame tube. The diameter of the circumference is determined by the formula protected by the present invention. The angle between the central axes of the prechambers is from 30 to 90 degrees. Fuel prechamber nozzles are hydraulically combined into three independent groups. The first group contains the nozzles of the upper and lower tiers operating in the maximum thrust mode. The second group contains a part of the nozzles of the upper and lower tiers operating in the cruising mode. The third group contains nozzles of the lower tier operating in start-up and low-gas modes. The nozzles are connected to the fuel manifold connected to the switching device. The nozzles of the prechambers are located on the front wall in the prechamber end opposite to the nozzle twist apparatus, in the central zone of which there is a cylindrical branch pipe forming a channel which axis coincides with the central axis of the prechamber.

EFFECT: increased efficiency of the combustion process in the combustion chamber in different operating modes, reduced emissions of nitrogen oxides, reduced length of the flame tube and reduced weight of the combustion chamber and the engine as a whole, reduced thermal load on the walls of the prechambers and the walls of the flame tube in the combustion zones, decreased non-uniformity of the temperature field of the combustion products at the chamber exit.

5 cl, 6 dwg