Modeling and Characterization of Perforates in Lined Ducts

ISBN-13: 9783639156997 / Angielski / Miękka / 2009 / 248 str.

Tamer Elnady

Opis

Increased national and international travel over thelast decades has caused an increase inthe global number of passengers using different meansof transportation. Great effort isbeing directed to improving the noisy environment inthe residential community. There is also a strongcompetition between different manufacturers to maketheir products quieter. Many recent studies on noisereduction involve the use of perforated plates in theair and gas flow ducting connected to the engine.This book deals with the modeling of perforates as anabsorbent. Liners have to be carefully tailored inorder to achieve the most efficient attenuation. Thisbook fills some gaps in the impedance modeling ofperforated liners. It also concentrates on thosecomplicated situations of sound propagation in ductsthat were solved earlier using Finite ElementMethods. Alternate analytical solutions tothese problems are developed here, which gives morephysical insight into the results.

O autorze

B.Sc. (1997) and M.Sc. (2000) in Mechanical Engineering from Ain
Shams University in Cairo. Ph.D. (2004) in Technical Acoustics
from the Royal Institute of Technology in Stockholm. Assistant
Professor at Ain Shams University. Head of the ASU Sound &
Vibration Lab. President of the Acoustical Society of Egypt.