Development of a cycle design software for turboshaft engines

Erk, Mert
In this thesis, a computer software for the cycle design of a turboshaft engine is developed. Firstly, a numerical air model was implemented and the model of the turboshaft to be used in the simulation was selected. The first requirement for the software is the capability of performing design point calculations and parametric studies. This feature, which is the initial part of an aircraft engine design, was integrated into the software. At this point, to have a better estimation of the component performances, basic efficiency estimation modules of compressor, combustor and turbines were developed and embedded into the code. After setting the design point of the engine, the software can give insight to the designer about operating at different points from the design point in the operating envelope of the aircraft. In order to accomplish the off-design performance estimations, the map scaling technique was used with the reference maps and matching of the components of the designed turboshaft was programmed with the Newton-Raphson iteration technique. In addition to the off-design performance estimations, the dynamic behavior (transient) estimation module of the software was developed. After all, a GUI (Graphical User Interface) was constructed for the use of each parts of the software in a “user-friendly” environment. The results of the code were compared with the engine performance data and the commercially available program “GasTurb11” in order to confirm the reliability of the software to perform preliminary engine design studies.


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Citation Formats
M. Erk, “Development of a cycle design software for turboshaft engines,” M.S. - Master of Science, Middle East Technical University, 2015.