Hruška V, Krpenský A, Bednar̆ík M, Czwielong F (2023)
Publication Type: Journal article
Publication year: 2023
The concept of bound states in the continuum and leaky resonances is utilized in the design of a reactive silencer that can effectively suppress significant spectral lines while maintaining a low-pressure drop within the flow duct and does not require additional installation space. By adjusting the geometrical parameters of thin plates that are embedded in a waveguide, quasi-bound states (or leaky resonances) can be achieved. An optimization algorithm is employed to fine-tune these parameters, and this process is illustrated through two specific examples. The resulting design is validated through numerical simulations that account for the effects of low Mach number flow. The investigations showed that it is possible to design a spectral silencer with low-pressure drop based on the chosen approach. By combining several leaky resonances, stopbands were created with a transmission loss of up to 17 dB in a frequency range of 10 Hz.
Hruška, V., Krpenský, A., Bednar̆ík, M., & Czwielong, F. (2023). Novel design for acoustic silencers for ducts with flow based on the bound states in the continuum. Archive of Applied Mechanics. https://dx.doi.org/10.1007/s00419-023-02508-y
Hruška, Viktor, et al. "Novel design for acoustic silencers for ducts with flow based on the bound states in the continuum." Archive of Applied Mechanics (2023).