Gas Turbine Performance Simulation
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Gas Turbine Performance Simulation

  • Fast in set-up, modelling and calculating a Gas Turbine cycle
  • Generic modelling tool at (Off-)Design & transient conditions
  • Conjugate simulations of the main gas path combined with interactions of SAS-heat transfer and aero-thermal effects
  • Flexible due to component based nature
  • Intuitive and user-friendly drag & drop GUI
  • Comprehensive modelling and project management
  • High quality graphs: multiple and carpet plots

Get Your 30-day free trial

GTPsim is a system performance modelling environment for gas turbines and related energy systems.

Any gas turbine engine can be modelled by arranging and connecting component models in a corresponding configuration using a drag- & drop interface. Precise prediction of complex secondary air flows and heat transfer in gas turbine cycles outperforms conventional cycle tools.

Component models include the main gas path components of the turbomachinery, rotor system elements and components for cooling and ventilation (e.g. of the secondary air system (SAS)). In addition to GTPsim’ s standard zero-dimensional components models, one-dimensional models can be embedded such as turbomachinery mean line codes, 1-D heat exchanger / recuperator models and combustor multi reactor models. User defined correlations and restrictions can be added to the model parameters.
The interaction between the main gas path and the SAS is calculated in a full conjugate manner. With the optional parallel calculations of different gas and SAS paths, the execution speed is kept high. Heat transfer and other thermal effects can be added by using an extensive thermal network.
All model elements and inter-connections are graphically represented in the GTPsim model diagram.

Gas Turbine Exmaple:

compres_model_in_program compres_dialog_in_program
turb_model_in_program turb_dialog_in_program
comb_model_in_program comb_dialog_in_program

The component models and other elements are selected from various libraries and can be configured by using user friendly data entry windows.

A wizard function is provided to rapidly configure models of customary gas turbine configurations taking the user through a number of steps specifying basic engine design data. Simulation results can be presented in various formats including tabular and graphical form, including operating curves in component maps, also multi-curve plots and carpet plots. All output can be exported to files or the Windows clipboard in CSV-format (tables) and EMF- and BMP-formats (graphs).

In addition, GTPsim includes a comprehensive simulation project management functionality, thus providing an optimal overview of various model versions, simulation run cases and simulation results.

Typical applications


  • design point performance analysis and optimization,
  • off-design steady-state and transient performance prediction and analysis,
  • secondary air system design and optimization, control system design, Monte-Carlo probability analysis,
  • thermal effect analysis and prediction of heat transfer coefficients as boundary conditions in FEM simulations
  • virtual engine tests: condition monitoring and engine diagnostics
Application Programmers Interface (API) is available to run GTPsim from other software systems, for example as a gas turbine model embedded in an aircraft or large energy system model.


  • Steady-state and transient system performance (coupled SAS and main gas path plus heat transfer)
    • Start / Shut-down of gas turbine (heating of components)
    • Transient performance during load variations
  • Heat transfer calculation (calc. of core / wall temperature, heat transfer coefficient)
    • User- or predefined Nusselt correlation
    • Transient heat of components during load changes
    • Coupling of various heat transfer elements (e.g. multilayer casing)
  • Secondary Air System
    • Bleed flow can be either user specified or is a simulation result depending on the flowpath and back-pressure of the turbine
    • Flexibility for combinations of the secondary air system and thermal network
  • Life cycle analysis
    • Degradation functionality of compressor/turbine
    • Electric component degradation prediction
  • Model extension by electric components (batteries, electric motors, electric generators)
  • Analysis of control technology of the engine
    • Fuel flow response in emergency cases
    • Period for load changes and its influence on mechanical stresses in components and surge margin
  • Simulation of engine/gas turbine failures
    • Suspension of cooling flow due to blockage
    • Flame out in combustor
    • Overspeed of turbine (failures e.g. in generator or gear)
  • Performance data reverse engineering
  • Calculation of carpet plots
  • User friendly specification of operating points across entire flight envelope
  • Probability analysis (Monte Carlo)
  • Implementation of user-defined correlations and functions
To receive a free 30-day trial version, please contact us at:

GTPsim-Software: Prices & Packages on demand

For individual monthly subscription license please send request to
For non EU-countries special costs related to individual taxes and export have to be added.

GTPsim Basic : Design and Off-Design Calculations at Steady-State conditions
GTPsim Pro : Full version incl. Transient Cases and implemented Heat Transfer Model

Optional versions with price on request:

GTPsim CCM : Full version +
Customized Component Models
GTPsim API : Full version +
Application Programming Interface

GTPsim training and support courses: Prices* on demand

Training course: * Get started! 1 day, Software Introduction, usage guidelines, examples
Training course: * Advanced 2 days, advanced modeling, implementation of own correlations and equations, design sweeps
Training course: Customized on request

* Prices for online course, optional course be held on site is possible on request: additional travel and accommodation expenses
All prices excl. VAT