Anti-vibration cooling wall of ground gas turbine combustion chamber

Abstract

The invention provides an anti-vibration cooling wall of a ground gas turbine combustion chamber. The anti-vibration cooling wall comprises an inner wall and an outer wall, wherein the inner wall and the outer wall are connected by using screw type spring steel with incremental diameter and are arranged in a certain manner; a communicated cavity is formed between the inner wall and the outer wall. According to the anti-vibration cooling wall, by changing the wall surface structure of a main combustion chamber flame tube, the propagation of sound wave in a main combustion chamber is absorbed and changed, and then the phase difference between oscillation of sound pressure and fluctuation of heat release rate cannot remain unchanged all the time; meanwhile, the spring has a trimmer pressure effect, so that the occurrence of thermo-acoustic oscillation is effectively prevented. Through the arrangement of the spring in the anti-vibration cooling wall, the heat convection area of cooling air is increased, the cooling efficiency of cooling air is improved, and the anti-vibration cooling wall has a wide application prospect.

Description

technical field [0001] The invention relates to the field of gas turbines, in particular to an anti-vibration cooling wall for a combustion chamber of a ground gas turbine. Background technique [0002] The gas turbine is the crystallization of modern industrial achievements. The combustion chamber is an important part of the gas turbine. The main function of the combustion chamber is to convert the chemical energy of the fuel into heat energy. In the process of fuel combustion in the combustion chamber, some problems often occur, such as the phenomenon of oscillating combustion. When oscillating combustion occurs, it will be accompanied by large-scale oscillations in heat release and pressure, resulting in huge noise, resulting in severe vibration of the combustion device, affecting the normal operation of the combustion device, and even causing damage to system components in severe cases. Generally speaking, when the disturbance reaches the point where the chemical reacti...

AI Technical Summary

Problems solved by technology

The walls of modern gas turbine combustors are partially cooled by floating wall structures, and some are cooled by labyrinth structures. Although these two cooling methods can achieve good cooling effects, the wall structures of the combustion chambers constructed by these two methods are different. Relatively complex and difficult to process

Images