Website of the GasTurb Inventor
This software for calculating gas turbine performance has been well known in the public domain and acknowledged all over the world since 1995. In 2013 the ownership of GasTurb 12 and the accompanying software was transferred to the newly founded GasTurb GmbH in Aachen, Germany. I continued to support the further GasTurb development with my experience. Thanks to this fruitful cooperation, we were able to create an even more powerful release, named GasTurb 13. This software kept the established structure, technical standards, and engineering approach, while also introducing some enhancements to the easy-to-learn, user-friendly graphical interface.
In October 2019 GasTurb GmbH declared the end of collaboration.
Since retiring from MTU Aero Engines, I have been working as a freelancer in the field of gas turbine performance. My research interests include software with intuitive user interfaces, special graphical output formats, automatic identification of dubious inputs and results, robust algorithms, and exceptional simulation tasks. I share the results of my research on this website, and I present them at conferences, seminars, and workshops with my consulting clients.
GasTurb is now a trademark of GasTurb GmbH, Aachen, Germany
Two more Engine Models have been added recently to this website: the CFM56 LEAP-1A and the PW1100G-JM. Both engines are used on the Airbus A320neo. In addition to the cycle design point overview, the secondary air system schematic, and the geometry model, you will find Sankey diagrams for all engines.
Sankey and Grassmann Diagrams are not commonly known among gas turbine performance engineers because they are not included in the results of most performance programs. They provide more information than the well-known enthalpy-entropy diagrams - they show the magnitude of the energy and exergy flows in turbofans and turboshafts.
Would you like to use such diagrams to improve your publications or lectures? I can make these diagrams for you. Send me your GasTurb input file! I will make the diagrams for you at no cost.
My recent publications
I have presented the paper "Practice-Relevant Teaching of Gas Turbine Performance" at the GPPS conference 2025 in Shanghai. You can download both the paper and the presentation I have shown from the "My publications" page. This paper has been proposed for publication in the GPPS Journal.
The tutorial, "The Basics of Gas Turbine Off-Design Performance" is also available there. I presented it at the ASME Turbo Expo 2025 in Memphis, Tennessee, USA.
A tutorial dealing with gas turbine "Starting and Windmilling" is available for download free of charge from the Tutorials page.
More...
GasTurb 15 has been released. I don't have access to this program. Since 2021, I've also been denied access to GasTurb 14.
Last updated 5 March 2026
These engine performance models represent real engines, making them valuable resources for anyone interested in learning about gas turbines. For each engine, the numbers for the thermodynamic cycle design point are provided. These numbers can be reproduced with any professional gas turbine performance program.
In addition to the performance data, geometry models as they may be used for concept studies are compared to engine cross sections found online.
Additionally, Sankey diagrams are provided that illustrate the energy flows within an engine. This makes the importance of the various engine components visible. Comparing Sankey diagrams of different engines can create a "wow effect."
Overall, a lot of material for practice-relevant teaching of gas turbine performance.
| BR710 | A power plant for business jets — a two-spool, mixed-flow turbofan with a bypass ratio of 4. |
| F107-WR-400 | Cruise missile propulsion — a two-spool, mixed-flow turbofan with a bypass ratio of 1 |
| EJ200 | The engine of the Eurofoighter Typhoon — a two-spool, mixed-flow turbofan with a bypass ratio of 0.4 |
| CFM56-3 | The power plant of the Boeing 737-400 — a two-spool, unmixed-flow turbofan with a bypass ratio of 5 |
| V2500 A1 | A turbofan used on the Airbus A320— a two-spool, mixed-flow turbofan with a bypass ratio of 5.4 |
| CFM56-Leap1A | The conventional turbofan used on the Airbus A320neo — a two-spool, unmixed-flow turbofan with a bypass ratio of 11 |
| PW1100G-JM | The geared turbofan used on the A320neo— a two-spool, unmixed-flow turbofan with a bypass ratio of 12 |
There are nine Compressor Maps and two Turbine Maps available for you to download in GasTurb and NPSS format. These maps are extended down to 1% spool speed. They are suitable for engine start and windmilling simulation.
Seven Performance Models of real engines are now available.
The history of GasTurb began in the early 1990s. I presented the first paper about it at the International Gas Turbine and Aeroengine Congress and Exposition, Houston, Texas, back in June 1995.
This is my today's version of the same figure:
