Numerical Mode Matching Approach for Acoustic Attenuation Predictions of Double-Chamber Perforated Tube Dissipative Silencers with Mean Flow

作者：Fang, Z.^*; Ji, Z. L.

来源：Journal of Computational Acoustics, 2014, 22(2): 1450004.

DOI：10.1142/S0218396X14500040

• Numerical mode matching approach
• transfer matrix method
• perforated tube dissipative silencer
• mean flow
• acoustic attenuation performance

The transfer matrix method (TMM) based on numerical mode matching (NMM) approach is developed to investigate the acoustic behavior of double-chamber perforated tube dissipative silencer with mean flow. The present method is verified by comparing the transmission loss (TL) predictions and experimental data. Then the effects of mean flow, perforated tube offset and lengths of perforations are studied computationally. As the Mach number increases, the TL of dissipative silencer is lowered at most frequencies. The perforated tube offset may change the acoustic behavior in the mid-high frequency range. Increasing the total length of perforations increases TL at the mid-high frequencies.

• 出版日期2014-6
• 单位哈尔滨工程大学