Header menu link for other important links
X
Calculation of perforated muffler element impedance by computational fluid dynamics
Published in
2005
Volume: 3
   
Pages: 2382 - 2389
Abstract
The main objective of this study is to use CFD tool to obtain the perforate impedance data. No restrictions on the flow and acoustic modeling are placed. The input to the muffler flow model is a turbulent velocity profile. An unsteady flow analysis is carried out to predict the pressure and velocity fluctuations at various locations in the muffler. The impedance is then calculated for different frequencies of input fluctuations and compared with existing empirical models. Transmission Loss calculations are also carried out. The effects of mean flow Mach number and porosity on impedance are investigated. The results indicate that this technique holds promise and can be a good design tool for complex geometries.
About the journal
Journal12th International Congress on Sound and Vibration 2005, ICSV 2005
Open AccessNo
Concepts (12)
  •  related image
    ACOUSTIC MODELING
  •  related image
    Complex geometries
  •  related image
    Different frequency
  •  related image
    Empirical model
  •  related image
    Transmission loss
  •  related image
    TURBULENT VELOCITY
  •  related image
    UNSTEADY FLOW ANALYSIS
  •  related image
    Velocity fluctuations
  •  related image
    Computational fluid dynamics
  •  related image
    MUFFLERS
  •  related image
    Tools
  •  related image
    Acoustic impedance