东南大学学报（自然科学版）Issue(6)：1075-1080,6.DOI:10.3969/j.issn.1001-0505.2015.06.009
附带共振腔的改进型迷宫密封性能分析
Performance analysis of improved labyrinth seal with resonance cavity
摘要
Abstract
To raise the performance of labyrinth seal,an improved labyrinth seal inspired by Helm-holtz resonance cavity is proposed.A second expansion cavity is designed and placed on the top of the traditional labyrinth seal cavity,which forces the airflow to expand once again inside the cavity and increases the velocity dissipation of the airflow.The leakage performance,dynamic and acoustic characteristics of the improved seal are analyzed numerically and compared with the traditional laby-rinth seal.The results show that the airflow inside the improved seal forms two vortices.The airflow expands sufficiently and the seal leakage reduces.The volume of the improved seal cavity increases, leading to the decrease of the low-frequency tangential flow force and the improvement of the seal stability in the low-frequency whirl zone.Due to the acoustic behavior of Helmholtz resonance cavi-ty,the reduction performance on low-frequency noise of the improved seal is enhanced.关键词
密封/亥姆霍兹共振腔/流体激振/消声能力Key words
seal/Helmholtz resonance cavity/flow induced vibration/noise reduction performance分类
能源科技引用本文复制引用
许万军,杨建刚..附带共振腔的改进型迷宫密封性能分析[J].东南大学学报（自然科学版）,2015,(6):1075-1080,6.基金项目
国家自然科学基金资助项目（51275088）． （）
