Lubrication Theory

Topics: Bearing, Fluid dynamics, Bearings Pages: 18 (4997 words) Published: September 27, 2010
MEEN 626 - Lubrication Theory:Class Syllabus FALL06
Instructor: Dr. Luis San Andrés, ENPH 118, Phones: 5-0160, 2-4744, Class Time: T, R 3:55-5:10 pm ENPH 215 Office hours: R: 2:00-3:00 p.m., or by appointment. Catalog Course Description: Development of Reynolds Equation from Navier Stokes equations for study of hydrodynamic lubrication theory as the basis for bearing design; applications to simple thrust and journal bearings and pads of various geometries; hydrostatic lubrication, floating ring bearings, compressible fluid (gas) lubrication, grease lubrication, dynamically loaded bearings, half speed whirl and stability. Prerequisites: MATH 308, MEEN 345 or equivalent. MY OBJECTIVES: To introduce the fundamental physical principles of the classical theory of hydrodynamic lubrication and to review the latest advances and applications to high speed, externally pressurized, turbulent flow bearings and seals with process fluids. To provide guidance on the important aspects of modern lubrication theory and novel applications. The class material emphasizes the understanding of physical principles and the effects of fluid film bearings on the dynamics of rotating machinery. Text Book: San Andrés, L. Modern Hydrodynamic Lubrication Theory, Class Notes (339 pages) available at TEES Copy Center (WERC 221) or pdf files (Notes i-14) available at class web site San Andrés, L., Introduction to Pump Rotordynamics (26 p.), Hydrodynamic fluid film bearings and their effect on the stability of rotating machinery (35 p.), Annular pressure seals and hydrostatic bearings (36 p.) von Karman Institute - RTO Lecture Series, RTO-MP-AVT-143, DESIGN AND ANALYSIS OF HIGH SPEED PUMPS,


Childs, D., Turbomachinery Rotordynamics, J. Wiley Pubs., 1993, Chps. III & IV. Szeri, A., Tribology: Friction, Lubrication & Wear, Taylor & Morgan Pubs., Hamrock, B., Fundamentals of Fluid Film Lubrication, McGraw-Hill, Inc., 1994. Selected journal papers (mandatory reading) listed in Index of Notes (pages 7-ff Syllabus). Set # 2 (199 pages) available at WERC Copy Center TWO 75 min. lectures/week. Group homework assigned & graded. Two exams and a group selected project. 1: Design of thrust and journal bearings, Thursday, October 5, 3:55-5:10 p.m. 2: Rotordynamic and Bearings, Tuesday, November 21, 3:55-5:10 p.m. 20% 5% 25% 25% 25% (proposal due Thursday, November 9) 100%

Course Outline: EXAMS:

GRADING: Group Assignments Weekly (individual) quizzes First Exam Second Exam Class Project Notes:

University justification required for missing Exams. All background material on prerequisites is responsibility of each student. Project topic approved by Tuesday, November 14, Project report due and presented in class on December 5. November 3: Last day for all students to drop course with no penalty (Q-drop). Reading material assigned is mandatory. In class discussions and quizzes on the assigned reading topics are regularly conducted. MEEN 626 Fall 2006 1

MEEN 626, Class Syllabus
Dr. Luis San Andrés, Fall 2006 T, R 3:55-5:10 pm ENPH 215
W 1 (Dates) 08/29

L. San Andrés - Instructor I -exam: Thursday, 10/05 (class time) II-exam: Tuesday, 11/21 (class time) Notes Intro, Reading Assignment Pinkus, JoT, 1987, pp.1-20.

Note: All reading assignments (technical papers) are given in Sections 15 and 16 of your Class Notes (Syllabus – pages 7-ff). Lecture Material (subject to revision) Introduction Class description. Tribology Needs for the 2000’s. Friction Laws. Lubrication principles. Movies on lubrication fundamentals. Types of bearings. The basis of rotordynamic analysis. The equations of lubrication. Classical Lubrication: Laminar Flow Fluid Film Bearings. The Reynolds Equation. Magnitude of fluid inertia effects. Boundary conditions and the notion of liquid cavitation. 1-Dimensional bearings: Evaluation of pressure field and forces for slider, Rayleigh-step bearings and simple dampers. Kinematics...
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