期刊论文

Cheuk Ming Mak

英文

International Journal of Aeroacoustics

1475-472X

2023

22

1-2

23-40

10.1177/1475472X221150175

The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. 15207820) and the National Natural Science Foundation of China (Grant No. 52008033).

本校为其他机构

Helmholtz resonators (HR) are widely used in aero-engine systems for noise reduction. By connecting a pair of HRs in series (neck-cavity-neck-cavity), a dual HRs system is formed. This study investigated the influence of neck length, cavity volume and flow Mach number on the noise attenuation performance of a dual HRs system. A three-dimensional numerical simulation was performed to calculate the transmission loss results. The transmission loss (TL) results indicated that the second neck length can influence the second resonance frequency and T...