Performance evaluation of duct bends


  • Ramani Ramakrishnan Department of Architectural Science, Ryerson University, Toronto, ON, Canada
  • Romain Dumoulin 3126 Blvd. Rosemont, Montreal, QC, Canada


Acoustic fields, Acoustical performance, Duct bends, Finite element techniques, Liner material, Material property, Multi-dimensional model, Multi-physics, Performance evaluation


The 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.




How to Cite

Ramakrishnan R, Dumoulin R. Performance evaluation of duct bends. Canadian Acoustics [Internet]. 2011 Sep. 1 [cited 2022 Jan. 29];39(3):144-5. Available from:



Proceedings of the Acoustics Week in Canada

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