**Department of
Mechanical & Aerospace Engineering**

**School**** of Engineering**

**University**** of Virginia**

**Instructor:** R.J.
Ribando, Assoc. Prof. Emeritus

Office: 310 MEC

Phone: 924-6289

Office hours: When door open

e-mail: rjr at

**Course: **This
course is intended mainly for 4^{th} year aerospace and mechanical
engineers. In 4120 we apply
fundamental principles of thermodynamics and fluid mechanics to gas turbines,
with emphasis on aerospace propulsion, but also including
“aero-derivative” stationary power generation equipment. We will review fluid mechanics,
compressible gas dynamics and thermodynamics as we solve gas turbine and
turbomachinery problems. We begin
by discussing the gas power cycles as introduced in thermodynamics class. Then we proceed to individual components
of gas turbines, including turbomachines, and analyze them separately. Finally the separate components will be
integrated so that an entire system is analyzed. Lectures will amplify major points of
the reading assignments as well as introduce complementary material. In addition you will gain much
facility in the use of Excel, Visual Basic for Applications (Excel’s
embedded programming language) and the visual presentation of quantitative
results.

**Text: **Flack,
R.D., *Fundamentals of Jet Propulsion with Applications*,

** (Note:** A paperback edition of this book is
available through the bookstore.)

**Reference: **Moran, M.J. and
Shapiro, H.N., *Fundamental of Engineering
Thermodynamics*, 6^{th} Ed., Wiley, 2008 (or equivalent).

** **Fox,
McDonald, and Pritchard, *Introduction to
Fluid Mechanics*, 6^{th} Ed., 2006 (or equivalent).

**Class
Meetings:** MW 9:30 – 10:50, MEC 215. You will be expected to attend all
classes, since you will be working on assignments and projects in class. (It is being held in a
“hands-on” computer classroom.) If you are a chronically disengaged
student who does not attend class regularly, please do not sign up for this
course.

**I.T. Requirements: **Since
we will be meeting in one of the ITS classrooms (MEC 215, which has
had a few computer upgrades since this VR tour) and will, when appropriate, be
using the computers, plan on having an active Collab account, Home
Directory account (or other means to save work from class), Eservices account
and Hive account.

We will be using Excel and its macro programming language (Visual Basic for Applications, VBA) a lot in this course.

You will also want to have a Hive account. The Hive allows Mac and Unix users to use VBA and it also has on it the TFProps Excel add-in for fluid properties. TFprops is currently only useable in Excel 2003 and there is an installation of it on the Hive.

**Tests: **Two
tests are scheduled during the semester and will be representative of the
homework assignments and in-class projects. These tests are to be pledged and will
be open book and notes. In some
cases you will be permitted to use the spreadsheets that you personally have
developed during the course or which the instructor provided to you. Solutions
will be posted after the tests. The
final exam will also be open book/notes and comprehensive. Several short, possibly Collab-administered,
quizzes may also be given.

**Homework: **Approximately
ten unpledged homework assignments will be assigned and collected during the
semester. Many of these will be
started in class and finished outside.
These problem sets are intended to develop problem-solving techniques
and to help students get the feel of the magnitudes of the different
parameters. Usually about one week
will be given for the completion of a problem set or project. One or two team mini-design projects are
planned. Solutions to homework and
selected other problems will be posted.
Homework assignments should adhere to the following guidelines:

1. Spreadsheets are to be well-documented. You (and I) should be able to go back to them a month later and figure out what you did! This includes units, procedures, etc.

2. Spreadsheets will be submitted electronically through Collab.

3. The user should be able to change any of the input parameters and have the effects propagate through the entire calculation properly.

4. Graphical presentation is required in all cases. If in doubt, ask!

5. The name you give to your spreadsheet should indicate what it is for and its author, e.g., BraytonCycle_ParisHilton.xls.

6. Check which version of Excel is appropriate for assignments. At least one assignment will have to be done in Excel 2003 (which is available on the Hive). A couple must be done in Excel 2007 or 2010.

7. You should change spreadsheet properties as appropriate, e.g., to make yourself the author.

8. You must be sure that your spreadsheet is completely independent of any other spreadsheets when you turn it in. This is especially important when you are putting together a comprehensive team project at the end.

**Grading: **We will
not have a grader, so grading of home works may at times be cursory. You are certainly welcome to drop by and
discuss any problems with which you have difficulty and in many cases we will
be working on them together in class. I will be grading exams and the
final thoroughly myself.

**Grades: **The
final grade will be determined as follows:

Homework/quizzes: 25

Tests: 40

Final Exam: 30

Class Participation: 5 (Includes attendance)

**Some Propulsion
Topics to Think About and Discuss **

**Diesel
Cycle – Compression-Ignition, Internal Combustion Engine (Excel
template)**

**Rankine
Cycle – Steam Power Cycle (Excel template)**

**Brayton
Cycle – Cold Air Standard Gas Turbine Cycle (Excel template)**

**One-dimensional,
Compressible Flow Functions (Excel spreadsheet with VBA macros)**

**Oblique
Shocks – Excel spreadsheet using VBA and Excel Solver**

** 1976 U.S.
Standard Atmosphere (Excel spreadsheet with VBA macros)**