Novel intelligent suppressor for unstable combustion

Abstract

The invention discloses a novel intelligent suppressor for unstable combustion and belongs to the field of combustion. According to the novel intelligent suppressor for unstable combustion, a controlsystem is utilized for collecting oscillation pressure generated by unstable combustion in real time, the oscillation main frequency is fast analyzed in real time, and then a stepping motor is used for outputting an adjusting signal. A sealing piston in a sound absorption pipeline is connected with a precision lead screw, a rotary lifting component rotates to adjust vertical movement of the sealing piston, and a gear transmission structure is formed by a gear mounted outside the rotary lifting component and a stepping motor; thus, the position of the sealing piston in the sound absorption pipeline can be adjusted through the stepping motor, and therefore the work frequency of the sound absorption pipeline is adjusted. The suppressor has a wide work frequency range, the optimal suppressingeffect can be guaranteed, and the problem that a traditional passive controller for unstable combustion is single in control frequency and narrow in work frequency band is solved.

Description

technical field [0001] The invention belongs to the field of combustion, and relates to a combustion instability suppressor, in particular to a novel combustion instability intelligent suppressor. Background technique [0002] In recent years, people have gradually paid attention to the issue of low-pollution emissions from combustion, and lean fuel combustion technology has great development potential in reducing emissions, but this makes fuel combustion more sensitive to acoustic disturbances, prone to combustion instability. Combustion instability widely exists in combustion systems such as gas turbine combustors, rocket engines, and boilers. The sonic disturbance generated by the combustion flame, etc. is reflected by the system boundary and reaches the flame position, and then further interferes with the flame. When the flame heat release pulsation and the sound wave are in the same phase (the phase difference is less than 90°), the two are coupled and driven by each ot...

AI Technical Summary

Problems solved by technology

The control system intelligently adjusts the position of the piston at the end of the wavelength tube through real-time monitoring of the oscillating pressure generated by combustion instability, thereby increasing its operating frequency range and solving the problems of single control frequency and narrow operating frequency band of traditional combustion instability passive controllers

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