热力透平2026，Vol.55Issue(3)：171-179,9.DOI:10.13707/j.cnki.31-1922/th.2026.03.001
阵列式延长颈-亥姆霍兹共振器在燃气轮机燃烧室中的应用
Application of Arrayed Extended Neck-Helmholtz Resonators in Gas Turbine Combustors
陈明敏1
作者信息
- 1. 上海电气燃气轮机有限公司,上海 200240
- 折叠
摘要
Abstract
Helmholtz resonators are effective structures for mitigating low-frequency thermoacoustic oscillations in gas turbine combustors.An analysis was conducted on characteristic of thermal barrier structures based on arrayed extended neck-Helmholtz resonators.Through theoretical modeling,CFD heat transfer simulations,and acoustic standing wave tube experiments,the effects of back cavity temperature and internal flow on the acoustic performance of the resonators were systematically investigated.The results are as follows:(1)Under an excitation sound pressure level(SPL)of 90 dB,when the back cavity temperature of the thermal barrier structure is 723 K,the resonance frequency is 349 Hz,and the peak sound absorption coefficient reaches 0.61;(2)At room temperature(293 K),the resonance frequency is 222 Hz with a peak sound absorption coefficient of 0.53,and this peak decreases as the incident SPL increases;(3)When there is grazing flow at the neck,the resonance frequency gradually decreases with the flow velocity increasing,accompanied by a significant reduction in the sound absorption coefficient.This study validates the effectiveness of arrayed extended neck-Helmholtz resonators in suppressing low-frequency thermoacoustic oscillations,providing theoretical basis and experimental support for acoustic damping design of gas turbine combustors.关键词
燃气轮机/亥姆霍兹共振器/隔热结构Key words
gas turbine/Helmholtz resonator/thermal barrier structure分类
能源科技引用本文复制引用
陈明敏..阵列式延长颈-亥姆霍兹共振器在燃气轮机燃烧室中的应用[J].热力透平,2026,55(3):171-179,9.
