Role of Polymeric Coating on Metallic Foams to Control the Aeroacoustic Noise Reduction of Airfoils with Permeable Trailing Edges
Abstract
:1. Introduction
2. Open-Foams with Polymer Coating
2.1. Foam Material
2.2. Polymeric Coating Applied to the Open-Cell Foam
2.3. Verification of the Coated Pore Size
2.4. Air Flow Resistivity Tests
2.5. Aeroacoustic Measurements of the Porous Materials
3. Material Characterization and Aeroacoustic Results
3.1. Material Characterization
3.2. Air Flow Resistivity Characterization
3.3. Far-Field Noise Measurements and Noise Reduction Validation
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Initial Pore Size | Coating Steps | Final Pore Size | Coating Thickness | Reference Uncoated |
---|---|---|---|---|
[μm] | [n] | [μm] | [μm] | [μm] |
1200 | 3 | 807 | 182.5 | 800 |
800 | 3 | 562 | 118.93 | 580 |
580 | 1 | 510 | 34.5 | 450 |
Sample | Resistivity, R | Permeability, K | Form Coefficient, C |
---|---|---|---|
[Ns/m4] | [m2] | [1/m] | |
Uncoated 450 μm | 36499 | 0.497 × 10−9 | 12,628 |
Uncoated 580 μm | 12,585 | 1.441 × 10−9 | 5291 |
Uncoated 800 μm | 7199 | 2.518 × 10−9 | 3678 |
Uncoated 1200 μm | 3230 | 5.612 × 10−9 | 2366 |
Coated 580 μm→510 μm | 24,465 | 0.741 × 10−9 | 24,019 |
Coated 800 μm→580 μm | 16,053 | 1.129 × 10−9 | 25,494 |
Coated 1200 μm→800 μm | 4969 | 3.648 × 10−9 | 10,614 |
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Hedayati, R.; Rubio Carpio, A.; Luesutthiviboon, S.; Ragni, D.; Avallone, F.; Casalino, D.; van der Zwaag, S. Role of Polymeric Coating on Metallic Foams to Control the Aeroacoustic Noise Reduction of Airfoils with Permeable Trailing Edges. Materials 2019, 12, 1087. https://doi.org/10.3390/ma12071087
Hedayati R, Rubio Carpio A, Luesutthiviboon S, Ragni D, Avallone F, Casalino D, van der Zwaag S. Role of Polymeric Coating on Metallic Foams to Control the Aeroacoustic Noise Reduction of Airfoils with Permeable Trailing Edges. Materials. 2019; 12(7):1087. https://doi.org/10.3390/ma12071087
Chicago/Turabian StyleHedayati, Reza, Alejandro Rubio Carpio, Salil Luesutthiviboon, Daniele Ragni, Francesco Avallone, Damiano Casalino, and Sybrand van der Zwaag. 2019. "Role of Polymeric Coating on Metallic Foams to Control the Aeroacoustic Noise Reduction of Airfoils with Permeable Trailing Edges" Materials 12, no. 7: 1087. https://doi.org/10.3390/ma12071087