Structured Porous Material Design for Passive Flow and Noise Control of Cylinders in Uniform Flow
Abstract
:1. Introduction
2. Materials and Methods
2.1. Porous Materials
2.2. External Design
2.3. Internal Design
2.4. Other Manufactured Examples
2.5. Experimental Method
2.6. Numerical Method
3. Results
3.1. Experimental Validation
3.2. Numerical Validation
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
Nomenclature
d | [mm] | bare cylinder diameter |
D | [mm] | porous coated cylinder outer diameter |
f | [Hz] | acoustic frequency |
h | [mm] | height of c-shaped chip |
l | [mm] | thickness of c-shaped chip |
L | [mm] | cylinder span |
r | [mm] | pore radius of c-shaped chip |
[-] | Reynolds number | |
[-] | Minimum-average Reynolds number | |
[-] | Maximum-average Reynolds number | |
[-] | Strouhal number | |
t | [mm] | porous coating thickness |
U | [m/s] | freestream flow velocity |
[] | porous coated cylinder volume | |
[] | equivalent solid cylinder volume | |
w | [mm] | width of c-shaped chip |
[%] | porosity | |
[] | circumferential angle |
Abbreviations
B&K | Brüel & Kjær |
CAD | Computer Aided Design |
CARDC | China Aerodynamics Research and Development Center |
CFD | Computational Fluid Dynamics |
DFM | Darcy–Forchheimer Model |
LOS | Line-Of-Sight |
MFPCC | Metal Foam Porous Coated Cylinder |
PCC | Porous Coated Cylinder |
PPI | Pores Per Inch |
PSD | Power Spectral Density |
PUPCC | Polyurethane Porous Coated Cylinder |
SPCC | Structured Porous Coated Cylinder |
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Cylinder Type | Testing Conditions | |||
---|---|---|---|---|
PCCs | U (m/s) | 20 | 30 | 50 |
(D = 60 mm) | 0.8 | 1.2 | 2.0 | |
Bare | U (m/s) | 20 | 30 | 50 |
(d = 40 mm) | 0.5 | 0.8 | 1.3 |
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Arcondoulis, E.J.G.; Liu, Y.; Li, Z.; Yang, Y.; Wang, Y. Structured Porous Material Design for Passive Flow and Noise Control of Cylinders in Uniform Flow. Materials 2019, 12, 2905. https://doi.org/10.3390/ma12182905
Arcondoulis EJG, Liu Y, Li Z, Yang Y, Wang Y. Structured Porous Material Design for Passive Flow and Noise Control of Cylinders in Uniform Flow. Materials. 2019; 12(18):2905. https://doi.org/10.3390/ma12182905
Chicago/Turabian StyleArcondoulis, Elias J. G., Yu Liu, Zhiyong Li, Yannian Yang, and Yong Wang. 2019. "Structured Porous Material Design for Passive Flow and Noise Control of Cylinders in Uniform Flow" Materials 12, no. 18: 2905. https://doi.org/10.3390/ma12182905