Contains the programs: AFPROP, ATMOS, COMPR, EQL, GASTAB, PARA, and PERF (each described below)
A CD-ROM containing an extensive collection of general and
specific computational software accompanies Elements of Propulsion:
Gas Turbines and Rockets. The main purpose of this software is
to allow the student to avoid the complex, repetitive, tedious calculations
that are an inevitable part of the propulsion analysis/design
and to instead focus on the underlying concepts and their resulting
effects. The software has been developed and refined with
the sometimes involuntary help of captive students from all walks
of life over a period of more than 20 years, and has become a
formidable capability. Put simply, the software plays an
essential role in achieving the pedagogical goals of the textbook
With practice, you will find your own reasons to be fond of the EOP software, but they will probably include the following six. First, the input requirements for any calculation automatically remind you of the complete set of information that must be supplied by the designer. Second, units can be effortlessly converted back and forth between BE and SI, thus evading one of the greatest pitfalls of engineering work. Third, all the computations are based on physical models and modern algorithms that make them nearly instantaneous. Fourth, many of the most important computational results are presented graphically, allowing visual interpretation of trends and limits. Fifth, they are compatible with modern PC and laptop presentation formats, including menu and mouse driven actions. Sixth, and far from least, is the likelihood that you will find uses for the broad capabilities of the EOP software far beyond the needs of the textbook Elements of Propulsion: Gas Turbines and Rockets. Look over the user guides and example screens using the links included below.Programs ATMOS, EQL, and GASTAB provided by Professor David Pratt.
AFPROP - Air/Fuel Properties. (Version 2.0 - April 2005). This program calculates the thermodynamic properties of air and jet fuels at low pressure in support of the textbook Elements of Propulsion: Gas Turbines and Rockets (2006). This program is available in both VisualBASIC source code and executable code. Example screen (14KB pdf)
ATMOS Program - Calculate properties of the atmosphere for standard, hot, cold, and tropical days. Example screen (90KB pdf)
COMPR Program - Preliminary mean-line design of multi-stage axial-flow compressor. Includes blade, rim, and disc stresses. Program user guide (1.7MB pdf)
EQL Program - Equilibrium properties and process end states for reactive mixtures of ideal gases, for different problems involving hydrocarbon fuels and air. Example screens (150KB pdf)
GASTAB Program - Equivalent to traditional compressible flow appendices for the simple flows of calorically perfect gases. Includes: isentropic flow; adiabatic, constant area frictional flow (Fanno flow); frictionless, constant area heating and cooling (Rayleigh flow); normal shock waves; oblique shock waves; multiple oblique shock waves; and Prandtl-Meyer flow. Example screens (180KB pdf)
PARA - Parametric Analysis of Gas Turbine Engines (Version 4.2 - June 2006 for Windows). This program calculates the variation in performance with design parameters (on-design analysis) of gas turbine engines (ideal and real) in support of Chapter 5 and 7 in Elements of Propulsion: Gas Turbines and Rockets (2006) published by AIAA. This program was written in VisualBASIC with user-friendly pull-down menus and data fields. Program user guide (1.6MB pdf).
PERF - Performance Analysis of Gas Turbine Engines (Version 4.2 - June 2006 for Windows). This program calculates the variation in an engine's performance with changes in flight condition and throttle in support of Chapter 8 in Elements of Propulsion: Gas Turbines and Rockets (2006) published by AIAA. This program was written in VisualBASIC with user-friendly pull-down menus and data fields. Program user guide (2.6MB pdf).
TURBN - Preliminary mean-line design of multi-stage axial-flow turbine. Includes blade, rim, and disc stresses.Program user guide (1.1MB pdf)..