| Autor: |
Sampath, Kaushik, Sieck, Caleb F, Guild, Matthew D, Ikei, Alec K, Rohde, Charles A |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Applied 15, 064069 (2021) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevApplied.15.064069 |
| Popis: |
This study introduces a framework for the design and implementation of acoustic black holes (ABHs) in airfoils. A generalized multi-parameter damped-ABH generation function is mapped onto NACA series airfoils. Representative geometries and a uniformly distributed baseline, all with the same mass of structure and damping are fabricated using multi-material PolyJet 3D printing. Laser Doppler vibrometer measurements along the airfoil chord in response to a broadband 0.1 - 12 kHz excitation show a decrease in trailing edge vibrations by as much as 10 dB, a broadband 5 dB reduction across the entire chord as well as substantial spatial and temporal modulation of flexural waves by ABH-embedded foils. Finite element analysis (FEA) models are developed and validated based on the measured data. Furthermore, a parametric FEA study is performed on a set of comparable designs to elucidate the scope of modulation achievable. These findings are applicable to trailing-edge noise reduction, flow control, structural enhancement and energy harvesting for airfoils. |
| Databáze: |
arXiv |
| Externí odkaz: |
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