Class Notes - Modern Lubrication
San Andrés, L. Modern Hydrodynamic Lubrication Theory, Class Notes (~500 pages) pdf files (Notes 0-16).
All material is copyrighted by Dr. Luis San Andrés. No distribution of the material listed below without express permission from the author.
Recent Submissions
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(2020-07-06)A short description on what a driver is and what a load is and how to match them. Knowledge that everybody "knows" but no one teaches it
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(Turbomachinery Laboratory, 2017-05-24)The report details a thermo-hydrodynamic (THD) analysis for the static and dynamic force performance of TPTBs. The goal is to deliver a modern predictive tool for TPTBs to be further integrated into the XLTRC2 software suite.
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(2010)The fundaments of analysis – Incomplete document. Presentation.
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(2010)Appraisal of the art. Technical Presentation to IFToMM Rotordynamics Conference, Seoul, Korea (Sept, 2010)
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(2009)Variable Filter method for bearing parameter identification.
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(2010)Appraisal of the art. Design considerations. Force Coefficients. Lubricant cavitation and air entrainment in SFDs. Response of a Rigid Rotor Supported on open-ended SFDs. (*) Digital video clips showing air entrainment in ...
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(2009)The mechanism of centering stiffness in seals. Force coefficients for short-length pressure seals. Design of annular seals: swirl brakes, impact on rotordynamics. Hydrostatic bearings in modern applications. The principle ...
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(2009)Floating ring seals for compressors: leakage and force coefficients, seal lock up and effect on rotor stability, recommendations to reduce seal cross-coupled effects. Long oil seals as pressure barriers in industrial ...
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(2009)The complete set of bulk-flow equations for the analysis of turbulent flow fluid film bearings. Importance of thermal effects in process fluid applications. A CFD method for solution of the bulk-flow equations.
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(2009)When fluid inertia effects are important. Bulk-flow model for inertial flows. Turbulence and inertia in short length journal bearings and open end dampers.
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(2009)The nature of turbulence. Turbulence equations in thin film flows. Turbulence flow models. The bulk-flow model of turbulence, Hirs’ and Moody’s friction factors.
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(2009)Evaluation of dynamic force coefficients in finite length bearings using a perturbation of the flow equations. Finite Element models: basic equations and their solution.
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(2009)Appropriate boundary conditions for a sound cavitation model. The basics of a universal cavitation model (algorithm).
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(2009)Equations of motion of a rigid rotor. The concept of force coefficients. Derivation of stiffness and damping coefficients for the short bearing. Stability analysis and the effect of cross-coupled stiffness. Effect of rotor ...
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(2010)The long and short bearing models. Pressure field and fluid film forces on short length journal bearings. Equilibrium condition, load capacity and the Sommerfeld number.
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(2009)Reynolds equation for cylindrical journal bearings. Kinematics of motion and film thickness. Distinction between fixed and rotating coordinates. The pure squeeze velocity vector. Examples of journal motion.
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(2009)Derivation of Reynolds equation for laminar flow bearings. Boundary conditions and types of liquid cavitation.
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(2009)The fundamental assumption in Lubrication Theory. Derivation of thin film flow equations from Navier-Stokes equations. Importance of fluid inertia effects in thin film flows. Some fluid physical properties
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(2010)The basic laws of friction. Fluid Film Bearings. Basic Operational Principles. Hydrodynamic and Hydrostatic Bearing Configurations. Example of rotordynamic study. Performance objectives.
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