Material | Poroelastic core | Aluminium | Al-alloys | MPP1 | Air |
Young’s modulus (E), [Pa] | 414 × 103 | 70 × 109 | 73.1 × 109 |
|
|
Density ( ) [kg/m3] | 57 | 2700 | 2780 | - | - |
Thermal conductivity ( ) [W/(m.K)] | - | - | - | - | 0.026 |
Prandt Number (Pr) | - | - | - | - | 0.71 |
Air Density ( ) [kg/m3] | - | - | - | - | 1.21 |
Ambient Pressure ( ) [Pa] | - | - | - | - | 101,325 |
Dynamic viscosity ( ) [Pa.s] | - | - | - | - | 1.81 × 10−5 |
Speed of sound ( ) [m/s] | - | - | - | - | 343 |
Specific heat ( ) [J/(kg.K)] | - | - | - | - | 1004 |
Poisson ratios ( ) [-] | 0.24 | 0.33 | - | - | - |
Frame loss factor ( ) [-] | 0.19 | 0.01 | - | - | - |
Statistic flow resistivity ( ) [N.s/m4] | 55 × 103 | 4.43 × 103 | - | - | - |
Specific ratio ( ) | - | - | - | - | 1.4 |
Tortuosity ( ) [-] | 1.05 | - | - | - | - |
Porosity [-] | 0.95 |
| - | 0.022 | - |
Viscous characteristic length ( ) [μm] | 37 | - | - | - | - |
Thermal characteristic length ( ) [μm] | 120 | - | - | - | - |
Perforations radius [mm] | - | - | - | 0.5 | - |
MPP thickness [mm] | - | - | - | 1 | - |
Skin thickness layer h [mm] | - | - | - | 0.2 | - |
Core/Air cavity H [mm] | - | - | - | 27 | - |