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Three Dimensional Flow and Pressure Patterns in a Single Pocket of a Hydrostatic Journal BearingThe flow in a hydrostatic pocket is described by a mathematical model that uses the three dimensional Navier-Stokes equations written in terms of the primary variables, u, v, w, and p. Using a conservative formulation, a finite volume multi-block method is applied through a collocated, body fitted grid. The flow is simulated in a shallow pocket with a depth/length ratio of 0.02. The flow structures obtained and described by the authors in their previous two dimensional models are made visible in their three dimensional aspect for the Couette flow. It has been found that the flow regimes formed central and secondary vortical cells with three dimensional corkscrew-like structures that lead the fluid on an outward bound path in the axial direction of the pocket. The position of the central vortical cell center is at the exit region of the capillary restrictor feedline. It has also been determined that a fluid turn around zone occupies all the upstream space between the floor of the pocket and the runner, thus preventing any flow exit through the upstream port. The corresponding pressure distribution under the shaft presented as well. It was clearly established that for the Couette dominated case the pressure varies significantly in the pocket in the circumferential direction, while its variation is less pronounced axially.
Document ID
19960020388
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Braun, M. Jack
(Akron Univ. Akron, OH United States)
Dzodzo, Milorad B.
(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
Fluid Mechanics And Heat Transfer
Accession Number
96N23966
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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