Noise Attenuation by Helmholtz Resonators Attached to a Duct
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Department of Mechanical and Production Engineering (MPE),Islamic University of Technology(IUT), Board Bazar, Gazipur, Bangladesh
Abstract
The resonating frequency and the transmission loss due to two 1-DOF cylindrical
Helmholtz resonator attached to a duct is thoroughly investigated in this literature to
attenuate low frequency noise using finite element method. Primarily, the relative
spacing between the two identical resonators attached to a duct is investigated in this
study to find the optimum positions between the resonators. The investigation is
further carried out by changing the dimensions of the cavity and neck for the optimum
relative position .Finally, based on these several investigations, a conclusion is drawn
for an optimized system of two identical 1-DOF Helmholtz resonators in terms of
position, orientation and geometry. The results shows a significant improvement in
noise reduction compared to a single 1-DOF Helmholtz resonator .The results of a
single 1-DOF Helmholtz resonator of a published literature were also validated both
analytically and numerically in this study.
Description
Supervised by
Prof. Dr. MD. Zahid Hossain,
Co-Supervisor,
Md. Shahriar Islam, Lecturer,
Department of Mechanical and Chemical Engineering (MCE),
Islamic University of Technology, (IUT),
Board Bazar, Gazipur-1704, Bangladesh.
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Citation
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