TourTour aerostatic journal bearing

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Calculation of bearing properties
 L/D ps/pa <10 η 10-6 Pa.s
 D 10-3 m kp 10-15 m2 R
 ΔR 10-6 m T K
 
 F* S N/µm M 10-5 kg/s
 s mm F N Q liter/min.
 (animation of pressure distribution)
 Symbols
 L Bearing length [m]
 D Shaft diameter [m]
 ΔR radial clearance [m]
 ps pressure supply [bar]
 pa atmospheric pressure [bar]
 kp permeability [m2]
 ε eccentricity ratio e/c [ - ]
 e eccentricity [m]
 s thickness porous ring [m]
 η gas viscosity [Pas]
 F Load [N]
 F* Load number F/ A(ps-pa), A=BD [ - ]
 M gas flow [kg/s]
 S Stiffness coëfficiënt [N/m]
 $ pressure ratio =0.5 [ - ]
 , relative eccentricity e/c=0.5 [ - ]
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