Head Loss Analysis on Acoustic Propagation on Duct Discontinuities of H-Type Microcells
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Abstract
A sudden change in the duct's cross-sectional area significantly impacts the head loss-causing acoustic propagation pressure. This article discusses how the optimal design of the H-type microcells is affected by head loss as a function of the duct cross-sectional area. The impedance limit requirements are taken into account when optimizing the microcell design. Transmission Matrix Method (TMM) and Genetic Algorithm (GA) optimization techniques are utilized to examine the duct's acoustic propagation and the duct's cross-sectional area change. The results obtained from this optimization are: buffer length in the range 48.75 mm – 48.83 mm, buffer radius in the range 8.78 mm – 8.79 mm, microcell length in the range 107.46 mm – 107.47 mm, and a microcell radius of 2.93 mm, with a resonance frequency in the range 1543.73 Hz – 1543.93 Hz.
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