The calculation and experiment study of noise reduction of cavity-type silencers in duct

• Main Authors: Cheng-Wei Lin, 林承緯
• Other Authors: Der-Yuan Liou
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/88821559328625721533

碩士 === 國立臺灣海洋大學 === 系統工程暨造船學系 === 97 === The purpose of this paper is to analyze the sound reduction of duct systems with Helmholtz Resonators pass through the spectral analytical instrument and finite element method (FEM) with COMSOL Multiphysics software. The acoustic pressures are compared with experiment and simulation. The sound reduction performance of Helmholtz Resonators can be determined by the experiment and simulation. The results can be used as the control of low-frequency of duct noise in the industrial field. We have done a series of simulation and experiment research for variations of the perforation of Helmholtz Resonators. Simultaneously, we focus on the measurements and studies of insertion loss, dynamic insertion loss, pressure drop, and airflow velocity. Finally, the feasibility of this Helmholtz Resonator has been verified via numerous experiments and analyses.