Table 2 Fundamental parameters of a gas face seal

Outer radius r_o (m)

0.0617

Inner radius r_i (m)

0.0516

Balance radius r_b (m)

0.0531

Spiral angle α (°)

15

Number of grooves N

12

Groove to land width ratio λ

0.5

Groove to dam length ratio β

0.6

Groove depth δ_g (μm)

6

Stator mass m (kg)

0.13

Support axial stiffness k _sz (kN/m)

16.4

Support axial damping c _sz (Ns/m)

1000

Hertz elastic modulus E (GPa)

23.65

Softer material hardness H (GPa)

0.5

Maximum contact pressure factor K

0.5401