Oscillation suppression component for combustor, design method and combustor

By designing an oscillation suppression member for the combustor, the distance between the spoiler and the flame is adjusted, the relative time delay of the vortex shedding is changed, and the synchronous coupling between the sound field of the combustion chamber and the turbulent vortex is damaged, the problem of combustion oscillation is solved, and the stability and efficiency of the combustion chamber are improved.

CN119713262APending Publication Date: 2025-03-28INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202510158485.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-13
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

Existing burners are prone to combustion oscillations during combustion, resulting in pressure fluctuations and heat release oscillations, which in turn affects the stability and safety of the combustion system.

Method used

An oscillation suppression member for a combustor is designed to adjust the distance between the spoiler and the flame through the cooperation of the sleeve and the spoiler, change the relative time delay of the vortex shedding, and destroy the synchronous coupling of the combustion chamber sound field and the turbulent vortex, thereby suppressing combustion oscillation.

Benefits of technology

Effectively suppress combustion oscillation, improve the working efficiency and stability of the combustion chamber, and reduce the damage to the structure of combustion oscillation.

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Abstract

The invention provides an oscillation suppression component for a combustor, a design method and the combustor, the combustor comprises a combustion chamber and a premixing pipe used for introducing premixed gas into the combustion chamber, a bluff body is installed in a cavity of the premixing pipe through a connecting rod, and the bluff body is constructed to be gradually expanded in the flowing direction of the premixed gas so as to stabilize combustion flames. The oscillation suppression component comprises a sleeve and a turbulent flow part, the sleeve is arranged on the connecting rod in a sliding and sleeving mode in the first direction parallel to the premixed gas flowing direction, and the turbulent flow part extends to the inner surface of the premixing pipe from the outer surface of the sleeve in the multiple radial directions and is constructed to adjust the distance between the oscillation suppression component and flames along with sliding of the sleeve. The relative time delay between vortex shedding generated by the turbulent flow part and vortex shedding generated by the bluff body is changed, so that combustion oscillation is inhibited.
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