锅炉技术2026，Vol.57Issue(4)：68-73,6.
某火电厂高温高压蒸汽管道声流耦合共振分析及处理
Analysis and Treatment of Acoustic Flow Coupling Resonance in High Temperature and High Pressure Steam Pipeline of a Thermal Power Plant
摘要
Abstract
Addressing the long-standing issue of high-frequency low-amplitude vibration and intense airflow noise in the main steam-to-high-pressure bypass steam piping of a 1 000 MW thermal power unit,on-site tests were conducted to locate the vibration source in the tee-branch pipe area of the high-pressure bypass.The tests confirmed that the vibration exhibited a pronounced single-peak frequency characteristic and was minimally affected by unit load.By comprehensively applying the acoustic-flow coupled resonance theory,on-site open/close tests of the high-pressure bypass valve,and finite element simulation calculations,the root cause of the piping vibration was identified as acoustic-flow coupled resonance.Ultimately,a mitigation measure involving shortening the length of the bypass branch pipe was implemented,which effectively eliminated the piping vibration fault.This case represents the first successful identification and resolution of such a resonance issue in the thermal power industry,providing an important reference for the analysis and handling of similar faults in the future.关键词
声流耦合/流致声共振/声模态/谐振腔/高压旁路管道/高压旁路阀Key words
acoustic flow coupling/flow-induced acoustic resonance/acoustic mode/resonant cavity/high-pressure bypass pipelines/high-pressure bypass valve分类
能源科技引用本文复制引用
李泽,马记,刘明,李日照,刘炳广..某火电厂高温高压蒸汽管道声流耦合共振分析及处理[J].锅炉技术,2026,57(4):68-73,6.基金项目
华电集团科技项目(CHDKJ22-02-56) （CHDKJ22-02-56）
