The analysis of actual lubrication problems needs to take into account particularities in the flow coming from kinematic conditions and contact geometry. For hybrid journal bearings lubricated by low dynamic viscosity fluid, turbulence and pressure drops due to inertia forces in the recess outlets are phenomena which must be taken into account to compute their working characteristics. A global method of study of lubricated contacts in isothermal laminar or not laminar flow by finite element method is presented. It can solve a great number of lubrication problems. A new type of approximation element for lubrication (Hermitian type) is used because it offers the following advantages: The nonlinearities in lubrication which come from turbulence phenomena, geometrical discontinuities (pressure drops) or boundary conditions (recess pressure) require the derivation of unknown functions. Added interpolations are not necessary to determine these values because the nodal unknowns are the values of the function and its derivatives in the two directions. As the modified Reynolds equation is in Cartesian coordinates, in the case of closed geometries such as journal bearings, joining is done just by nodal identification which guarantees continuity of the pressure and of its derivatives. The validity of this numerical model is realized with an experimental study done with a three recess hybrid journal bearing for different kinematic and geometric configurations. In a general way, experimental and theoretical results are in good agreement.
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April 1989
Research Papers
Hybrid Journal Bearings: Theoretical and Experimental Results
B. Bou-Said,
B. Bou-Said
Laboratoire de Me´canique des Contacts, I.N.S.A., 69621 Villeubanne, France
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J. P. Chaomleffel
J. P. Chaomleffel
Laboratoire de Me´canique des Contacts, I.N.S.A., 69621 Villeubanne, France
Search for other works by this author on:
B. Bou-Said
Laboratoire de Me´canique des Contacts, I.N.S.A., 69621 Villeubanne, France
J. P. Chaomleffel
Laboratoire de Me´canique des Contacts, I.N.S.A., 69621 Villeubanne, France
J. Tribol. Apr 1989, 111(2): 265-269 (5 pages)
Published Online: April 1, 1989
Article history
Received:
March 11, 1988
Online:
October 29, 2009
Citation
Bou-Said, B., and Chaomleffel, J. P. (April 1, 1989). "Hybrid Journal Bearings: Theoretical and Experimental Results." ASME. J. Tribol. April 1989; 111(2): 265–269. https://doi.org/10.1115/1.3261903
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