Comparison of Simulation and Experiment of Dual Helmholtz Resonator Silencing Performance in Different Cavities

• Main Authors: Chen, Bo-Han, 陳柏翰
• Other Authors: Liou, Der-Yuan
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/42825y

碩士 === 國立臺灣海洋大學 === 系統工程暨造船學系 === 107 === This article we analyze the Helmholtz Resonator with difference neck's length and difference cutting cavity to understand silencing performance. The research includes deriving the equation of motion of the model, establishing the model of the Helmholtz resonator and the pipe noise system, and simulating all models by finite element software. To study how influences to the original model natural frequencies by three steps. First we extend neck length, and then open orifices at the neck. At last we cut the cavity in longitudinal direction. After the simulation results, we find these changes will effectively make the natural frequencies shifting and add a number of frequencies. Finally, we also compare the noise reduction between simulation calculation and experiment by using 3D models.