Turbomachinery Laboratory   HOME

Hanyang University Department of Mechanical Engineering

Last revised: Nov. 15, 2023

1. Class information
  • Class Year and semester: 2021, Spring semester
  • Course No. : MEE3045
  • Course title: Lubrication Theory for Turbomachinery 2
  • Credit-Lecture Hour-Practice Training: 3.00-3.00-0.00
  • Course outline: One Three-hour lecture/week
  • Organizing Department: Mechanical Design Engineering (Graduate School; Class scheduled in ERICA Campus)

2. Instructor information
  • Name: Dr. Keun Ryu
  • Department: Mechanical Design Engineering
  • Email: kryu@hanyang.ac.kr
  • Web: http://turbolab.hanyang.ac.kr/MEE3045.html

  • Office hours: By scheduled appointment (E-mail in advance required)
  • About office hours: This is to encourage individual interaction between the students and the instructor. Students should prepare by organizing questions in advance.

3. Course objective
  Based the lecture provided during last semester (MEE3044: Lubrication Theory for Turbomachinery 1), this couse will continue to provide the fundamentals of the classic lubrication theory of hydrodynamic and hydrostatic lubrication. The introcutor will teach about Liquid cavitation in fluid film bearings, Turbulence flow in thin film bearings, annular pressure seals, and Squeeze film dampers.

4. Course Description:
The following topics will be discussed:
- Review for fluid film journal and thrust bearings

- Gas bearings

- Hydrostatic bearings

- Cavitation model
- Nature of turbulence. Turbulence equations in thin film flows. Turbulence flow models
- Bulk-flow model of turbulence, Hirs¡¯ and Moody¡¯s friction factors
- Turbulence and inertia in short length journal bearings and open end dampers.
- Floating ring seals for compressors
- Annular pressure (damper) seals
- Squeeze Film Dampers (SFDs)

 Prerequisites: Lubrication Theory for Turbomachinery 1, Vibrations, Fluid Dynamics, Dynamics

5. References: ALL Available in Hanyang University Library
  - Modern Lubrication Theory, L. San Andres, Texas A&M University Digital Library, 2010

  - Cameron, A., 1971, Basic Lubrication Theory, Longmans.
  - Khonsari, M. and E.R. Booser, 2001, Applied Tribology, John Wiley Pubs.
  - Hamrock, B.J., 1994, Fundamentals of Fluid Film Lubrication, McGraw-Hill Book Co.

  - Rotordynamics of Turbomachinery, J. Vance, Wiley, 1988, ISBN-10: 0471802581, ISBN-13: 978-0471802587

  - Turbomachinery Rotordynamics: Phenomena, Modeling, and Analysis, D. Childs, Wiley, 1993, ISBN-10: 047153840X, ISBN-13: 978-0471538400
  - Turbomachinery Rotordynamics with Case Studies, D. Childs, Minter Spring, 2013, ISBN-10: 0615852726, ISBN-13: 978-0615852720

6. Grading
Homework (30%), Mid-term Project Presentation (30%), Final Exam (30%), Attendance (5%), Class participation (5%)
Attendance to the lectures is a must for success.

7. HW Assignments (30%): Please submit Two-page summary (personal)

How to submit your HW ¡æ https://forms.gle/rFbCtSjULKkAgnAm9

Reading Assignment 1 (Due: Week 5) (6%)

Pinkus, O., 1987, "The Reynolds Centennial: A Brief History of the Theory of Lubrication," ASME Journal of Tribology, Vol. 109, pp. 1-20.

Reading Assignment 2 (Due: Week 7) (4%): Stability of Rotor-Bearing system
Rotor-Bearing Stability (E. J. Gunter)

Reading Assignment 3 (Due: Week 9) (4%): Annular gas seals
Annular Gas Seals and Rotordynamics of Compressors and Turbines (D. W. Childs and J. M. Vance)

Reading Assignment 4 (Due: Week 11) (4%): Fluid inertial effects
A Bulk-Flow Theory for Turbulence in Lubricant Films (G. G. Hirs)

Reading Assignment 5 (Due: Week 12) (4%): Fluid inertial effects

Turbulent Hybrid Bearings With Fluid Inertia Effects (L. San Andres)

Reading Assignment 6 (Due: Week 14) (4%): Effect of Bearings on the Rotordynamic Stability
Short Bearing Analysis Applied to Rotor Dynamics. Part 1: Theory  (R. G. Kirk and E. J. Gunter)

Reading Assignment 7 (Due: Week 15) (4%): Effect of Bearings on the Rotordynamic Stability

Short Bearing Analysis Applied to Rotor Dynamics. Part 2: Results of Journal Bearing Response (R. G. Kirk and E. J. Gunter)

8. Mid-term project topics (30%)

You can select one of the following technical papers:
- Gas-bearing turbomachinery

- Experimental Investigation of Air Bearings for Gas Turbine Engines
- Oil-Free Shaft Support System Rotordynamics: Past, Present and Future Challenges and Opportunities
- Pivoted-Pad Journal Gas Bearing Performance in Exploratory Operation of Brayton Cycle Turbocompressor

- The Use of Spiral Groove Gas Bearings in a 350 000 rpm Cryogenic Expander
- Analysis of an Aerodynamic Compliant Foil Thrust Bearing: Method for a Rapid Design
- Maximum Load Capacity Profiles for Gas Thrust Bearings Working Under High Compressibility Number Conditions
- Advancements in the Performance of Aerodynamic Foil Journal Bearings: High speed and Load Capacities

- Effect of Compliance on the Extend of Optimum Compliant Air Thrust Bearing Operating Range

Each student will have 30 minutes for presentation.
Please make a summary of the paper which you study using powerpoint format.
  1) # of Slides: No more than 40 pages
  2) Due: Week 8
  3) Format: Email me your file (ppt & pdf format) to kryu@hanyang.ac.kr before the class of Week 8.

9. Lecture material and topics

• Week 1
Fundamentals of Journal and Thrust Bearings: Note 1

• Week 2
Fundamentals of Journal and Thrust Bearings: Note 2

• Week 3
Fundamentals of Journal and Thrust Bearings: Review

Project & HW

• Week 4

Effects of Bearings, Seals, and Dampers on Rotordynamics: Note 3

• Week 5

https://rotorlab.tamu.edu/me626/Notes_pdf/Notes15%20Gas%20Film%20Lubrication.pdf

https://rotorlab.tamu.edu/me626/Notes_pdf/Gas%20Bearings%20for%20MTM%20IFToMM%202010.pdf

Gas film lubrication 1: Note 4

• Week 6

Gas film lubrication 2: Note 5

• Week 7

Hydrostatic lubrication:

https://rotorlab.tamu.edu/me626/Notes_pdf/presentation_Notes_12_Seals_Hydrostatic_bearings.pdf

https://rotorlab.tamu.edu/me626/Notes_pdf/Notes12b%20Hydrostatic%20Bearings.pdf

• Week 8

Mid-term project presentation and discussion

• Week 9

Mid-term project presentation and discussion

• Week 10

Mid-term project presentation and discussion