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Two-Dimensional Dynamic Simulation of a Continuous Foil BearingIn this paper, the two dimensional(radial and circumferential) transient Navier-Stokes equations are used to solve the hydrodynamic problem in conjunction with the time dependent motion of the journal, and the deformable, spring supported foil. The elastic deformation of the foil and its supports are simulated by a finite element model. The time-dependent Navier-Stokes formulation is used to solve for the interaction between the fluid lubricant, the motion of the journal and the deformable foil boundary. The steady state, the quasi-transient and the full transient dynamic simulation of the foil-fluid journal interaction are examined on a comparative basis. For the steady state simulation, the fluid lubricant pressures are evaluated for a particular journal position, by means of an iterative scheme until convergence is achieved in both the fluid pressures and the corresponding foil deformation. For the quasi-transient case, the transient motion of the journal is calculated using a numerical integration scheme for the velocity and displacement of the journal. The deformation of the foil is evaluated through numerical iteration in feedback mode with the fluid film pressure generated by the journal motion until convergence at every time step is achieved. For the full transient simulation, a parallel real-time integration scheme is used to evaluate simultaneously the new journal position and the new deformed shape of the foil at each time step. The pressure of the fluid lubricant is iterated jointly with the corresponding journal position and the deformed foil geometry until convergence is achieved. A variable time-stepping Newmark-Beta integration procedure is used to evaluate the transient dynamics at each time step of the bearing.
Document ID
19960020386
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Braun, M. Jack
(Akron Univ. Akron, OH United States)
Choy, F. K.
(Akron Univ. Akron, OH United States)
Dzodzo, Milorad
(Akron Univ. Akron, OH United States)
Hsu, J.
(Akron Univ. Akron, OH United States)
Date Acquired
August 17, 2013
Publication Date
March 1, 1996
Publication Information
Publication: Seals Code Development Workshop
Subject Category
Mechanical Engineering
Accession Number
96N23964
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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