Performance evaluation of duct bends
Keywords:Acoustic fields, Acoustical performance, Duct bends, Finite element techniques, Liner material, Material property, Multi-dimensional model, Multi-physics, Performance evaluation
AbstractThe American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) have developed simple steps to evaluate the attenuation of duct fittings such as elbows, lined and unlined, based on the results of Ver. The software applies finite element techniques to solve for the acoustical performances. The model is also capable of using the material properties of the liner materials. The liner is considered to be bulk reacting. Preliminary results of the multi-dimensional model will be presented in this paper. The current investigation has made use of COMSOL, a powerful multi-physics numerical analysis tool and has attempted to provide results based on multi-dimensional analysis. A given acoustic field was assumed at the inlet of the elbow and the outlet is connected to a long anechoic termination.
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