Frequency modulation device for combustion gas turbine flame tube and combustion gas turbine flame tube

Abstract

The invention relates to the technical field of combustion gas turbines, and discloses a frequency modulation device for a combustion gas turbine flame tube. The frequency modulation device includes a device body which is provided with a cavity, wherein the bottom of the cavity is provided with an opening for air circulation, an elastic element and a baffle positioned below the elastic element are arranged in the cavity, one end of the elastic element is connected with the top wall of the cavity while the other end of the elastic element is connected with the baffle, and a gap is reserved between the side of the baffle and the side wall of the cavity; the invention also provides a combustion gas turbine flame tube, including a flame tube wall on which a plurality of frequency modulation devices for the combustion gas turbine flame tube according to the above technical scheme is arranged, wherein the cavities of the frequency modulation devices communicate with the flame tube wall to facilitate the circulation of combustion gas flow. The frequency modulation device for the combustion gas turbine flame tube can achieve stepless regulation on resonant frequency in the frequency modulation device, to automatically damp or inhibit thermo-acoustic vibration within a specific frequency band in the flame tube.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to a frequency modulation device for a gas turbine flame tube and a gas turbine flame tube. Background technique [0002] Gas turbines are developing towards high power, high efficiency, low emissions, fuel diversification and long life. Its development trend is concentrated in: increasing the pressure ratio of the compressor and the initial temperature of the turbine inlet to improve the overall performance of the gas turbine; broadening the fuel adaptability of the combustion chamber to achieve efficient and low-carbon utilization of various energy sources; adopting advanced combustion technology to reduce pollution To meet the requirements of environmental protection, the emission of waste is reduced; the efficiency of components and the whole machine is continuously improved by adopting advanced design technology; developing new high-temperature materials and adopting advan...

AI Technical Summary

Problems solved by technology

In the patent No. CN1615416, Alstom invented a new type of gas turbine combustion chamber structure. In order to attenuate the thermoacoustic vibration in the combustion chamber, at least one Helmholtz damper is arranged. The Helmholtz The damping volume of the zipper damper is connected to the combustion chamber through a channel, and the damping frequency of the Helmholtz damper can be adjusted, but the damper also needs an additional frequency adjustment mechanism for the Helmholtz damper So that the structure of the combustion chamber becomes complicated

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