An Investigation of Acoustic Attenuation Performance of Silencers with Mean Flow Based on Three-Dimensional Numerical Simulation

Table 1

Dimensions for the silencers considered (unit: mm).

Silencer						(%)
Expansion chamber	108	40	208	52	—	—
Perforated pipe 1 ()	110	32	200	—	4	4.7
Perforated pipe 2 ()	110	32	200	—	6	9.0
Perforated pipe 3 ()	110	32	200	—	8	14.7