High by-pass turbofan engines aerothermodynamic design and optimization

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2014

Author

Uysal, Selçuk Can

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The first step in Engine Design for an airframe is being the on-design cycle analysis. The results of this analysis are later used in off-design cycle analysis, which gives critical information about the performance of the engine on the whole flight envelope. Both analysis results are later used in turbomachinery component design. In order to accomplish these objectives, an engine design model in MATLAB Simulink® (named as Engine Design Model, EDM) is developed for Separate Flow Turbofan Engines. This engine type is chosen according to its wide usage in Aerospace Industry, but the model can also be extended to the other types of Turbofan and Turbojet Engines. The Engine Design Model uses Variable Specific Heat Model in order to obtain best estimates in thermodynamic parameters throughout the whole cycle. The model use the solution algorithms given in Aircraft Engine Design, 2nd Edition [Mattingly, J.D., Heiser W.H., and Pratt, D.T., 2002] for cycle analysis and its verification is made with AEDsys Software, which also uses the same algorithm. The model also includes an aerothermodynamic turbomachinery design section, which uses the outputs from the cycle analysis and its validation is made with engine data of CFM56-5A and GE90-94B engines. The model is then used in an optimization process, which select the best engine according to the constraints determined by the user by using SIMPLEX and gradient descent algorithms.

Subject Keywords

Aerothermodynamics., Airplanes, Airplanes, Engineering design, Mathematical optimization

URI

http://etd.lib.metu.edu.tr/upload/12616850/index.pdf
https://hdl.handle.net/11511/23316

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

S. C. Uysal, “High by-pass turbofan engines aerothermodynamic design and optimization,” M.S. - Master of Science, Middle East Technical University, 2014.