Combustion chamber head turning-connection structure

Abstract

The invention relates to a combustion chamber head turning-connection structure. A convergence ring, an enlarging ring, a gas outflow ring and an impacting disk are included, wherein the diameter of the convergence ring is gradually shrunken in the direction from the inlet end of the convergence ring to the outlet end of the convergence ring, and an angle between the wall face of the convergence ring and the axis of the convergence ring is 5-30 degrees; the inlet end of the convergence ring is used for being connected with the outlet end of the outer wall of a combustion chamber; the diameterof the enlarging ring is gradually enlarged in the direction from the inlet end of the enlarging ring to the outlet end of the enlarging ring, and an angle between the wall face of the enlarging ringand the axis of the enlarging ring is 60-90 degrees; the inlet end of the enlarging ring is connected with the outlet end of the convergence ring; the inlet end of the gas outflow ring is connected with the outlet end of the enlarging ring; the impacting disk is annular, and is arranged on the outer side of the enlarging ring in a sleeving manner; the inlet end of the impacting disk is connected with the outer wall of the convergence ring, and the outlet end of the impacting disk is used for being connected with a flame barrel inlet end; the wall face of the impacting disk is provided with a cooling hole; an annular gap is formed between the outlet end of the gas outflow ring and the flame barrel inlet end; a cooling space is formed among the convergence ring, the enlarging ring, the gas outflow ring, the impacting disk and the flame barrel inlet end; and the cooling hole communicates with a cooling gas source and the cooling space.

Description

technical field [0001] The application belongs to the technical field of design of a combustion chamber head transfer mechanism, and in particular relates to a combustion chamber head transfer structure. Background technique [0002] The transfer structure of the combustor head is an important part of the gas turbine combustor. It is the structure connecting the entrance of the flame tube and the outer wall of the combustor. The easily ablated part of the middle. [0003] The existing combustion chamber head transfer structure mainly includes an impact plate, a connecting ring, and a splash plate. The splash plate is arranged inside the impact plate and directly contacts the high-temperature gas in the combustion chamber. A large number of cooling holes are opened on the impact plate to cool the air flow. Impact the splash plate through the cooling hole to cool the splash plate, and the connecting ring is used to connect with the wall of the flame tube. [0004] At present...

AI Technical Summary

Problems solved by technology

The fuel-lean low-emission combustor is designed to reduce the emission of pollutants in the combustor. The existing combustor head transfer structure is applied to the lean-fuel low-emission combustor. In the premixing section of fuel and air, the air velocity is lower than the flame propagation speed, resulting in excessively high fuel concentration in the boundary layer, resulting in flashback failure in the premixing section of the combustor, resulting in overheating and ablation of the premixing section in the combustor, and excessive discharge of pollutants in the combustor, failing to achieve the performance of the combustor with lean fuel and low emissions. In addition, it also has limitations on ignition of the combustion chamber and lean flameout.

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