Study of Noise Reduction Promotion of Composite Silencers in Middle and Low Frequency

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基本資料

Project title

Code/計畫編號

NSC98-2622-E019-013-CC3

Translated Name/計畫中文名

提升複合型消音器中低頻消音特性之研究

Project Coordinator/計畫主持人

Der-Yuan Liou

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Systems Engineering and Naval Architecture

Website

https://www.grb.gov.tw/search/planDetail?id=1932885

Year

2009

Start date/計畫起

01-11-2009

Expected Completion/計畫迄

01-10-2010

Bugetid/研究經費

395千元

ResearchField/研究領域

機械工程

本計畫主要內容是進行複合型之消音箱消音性能研究，其中利用共振吸音器（Helmholtz Resonator）之共振頻率特性應用在管道通風系統，進行消音量測並與COMSOL Multiphysics軟體以有限元素法模擬計算加以比對。藉由模擬與實測可判定各種型式共振吸音器之消音性能，結合傳統傳統之消音箱提昇各頻帶處之消音量，其結果可提供工業界參考應用，其中以提高管道內中低頻領域噪音的控制為主要目標。計畫中也擬針對共振吸音器的穿孔率、孔徑與空腔大小變化做了一系列的模擬計算與實測研究，同時也針對消音箱的插入損失（Insertion Loss）、動態插入損失（Dynamic Insertion Loss）、壓損（Pressure Drop）、壓損係數（Pressure Drop Coefficient）和流速（Velocity）進行實驗量測分析探討。 The purpose of this project is to analyze the sound reduction of composite silencers in 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 composite silencers noise reduction results can be promoted as the control of middle and low frequency of duct noise in the industrial field. We also 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, pressure drop coefficient, and airflow velocity.

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Study of Noise Reduction Promotion of Composite Silencers in Middle and Low Frequency

基本資料

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