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A Parametric Investigation of Louvered Terminations for Rectangular Ducts

Journal Article
2015-01-2356
ISSN: 1946-3995, e-ISSN: 1946-4002
Published June 15, 2015 by SAE International in United States
A Parametric Investigation of Louvered Terminations for Rectangular Ducts
Citation: Chen, G. and Herrin, D., "A Parametric Investigation of Louvered Terminations for Rectangular Ducts," SAE Int. J. Passeng. Cars - Mech. Syst. 8(3):1137-1141, 2015, https://doi.org/10.4271/2015-01-2356.
Language: English

Abstract:

The insertion loss of louvered terminations positioned at the end of a rectangular duct is determined using acoustic finite element analysis. Insertion loss was determined by taking the difference between the sound power with and without the louvers at the termination. Analyses were conducted in the plane wave regime and the acoustic source was anechoic eliminating any reflections from the source. The effect of different louver configurations on insertion loss was examined. Parameters investigated included louver length, angle, and spacing between louvers. Based on the analyses, equations were developed for the insertion loss of unlined louvers.