|
MEE6002: Air Film Lubrication
1. Class information
• Class Year and semester: 2019, SPRING semester
• Course No. : MEE6002
• Course title: Air Film Lubrication
• 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;
ERICA)
2. Instructor information
• Name: Dr. Keun Ryu
• Department: Mechanical Design Engineering
• Email: kryu@hanyang.ac.kr
• Web: http://turbolab.hanyang.ac.kr/MEE6002.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
To introduce the fundamental physical principles of the classical theory
of gas film lubrication and to review the latest advances and applications
to high speed air film bearings
4. Course Description:
The class will introduce fundamental principles and classical theory of
modern air film lubrication and practical application of air/gas bearings
for oil-free turbomachinery.
Prerequisites: Vibrations, Fluid Dynamics, Dynamics
5. References: ALL Available in
Hanyang University Library
TBA
6. Grading
Homework (30%), Mid-term Exam (30%), Final Exam (30%), Attendance (5%),
Class participation (5%)
Attendance to the lectures is a must for success.
7. Lecture material and topics
• Week 1
Introduction to gas bearings
• Week 2
Simple slider gas bearings
• Assignment 1
https://youtu.be/VmiEUBQbcIE
Please transcribe the above Youtube video clip.
(due: Mar. 26)
• Assignment 2 (due: Apr. 2)
I assign one technical paper to each individual group.
-
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
Each group will have 40 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: YOUR presentation date
3. Format: Email me your file (ppt format) to kryu@hanyang.ac.kr on your
presentation date.
• Week 3
Dynamic force coefficients for slider gas bearings
•Week 4
Cylindrical
gas journal bearings
• Assignment 3
I assign one technical paper to each individual group.
-
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
Each group will have 40 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: YOUR presentation date
3. Format: Email me your file (ppt format) to kryu@hanyang.ac.kr on your
presentation date.
• Week 5
Thin film flow analysis
for cylindrical bearing
• Week 6
Frequency reduced force
coefficients for tilting pad bearings
• Assignment 4
I assign one technical paper to each individual group.
-
Theoretical Analysis and Optimum Design of High Speed Gas Film Thrust
Bearings
-
Thermal Distortion of Spiral-Grooved Gas-Lubricated Thrust Bearings
-
Optimum Surface Profile for the Enclosed Pocket Hydrodynamic Gas Thrust
Bearing
-
Effect of Compliance on the Extend of Optimum Compliant Air Thrust Bearing
Operating Range
Each group will have 40 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: YOUR presentation date
3. Format: Email me your file (ppt format) to kryu@hanyang.ac.kr on your
presentation date.
• Week 7
Some consideration on the
solution of Reynolds equation for gas films
• Week 8
Mid-term exam
• Week 9
Example of performance of
a plain cylindrical gas journal bearing
• Week 10
Gas journal bearing force
coefficients and dynamic stability
• Week 11
Performance of a flexure
pivot – tilting pad hydrostatic gas bearing
• Week 12
An introduction to gas
foil bearingsPerformance of a simple one dimensional foil bearing
• Week 13
Consideration on foil
bearings for oil-free turbomachinery
• Week 14
Compliant surface bearings
• Week 15
Rigid surface gas bearings
• Week 16
Final Exam
|
