Conceptual Modelling of Civil and Military Aero-Engines

Examensarbete för masterexamen

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Type: Examensarbete för masterexamen
Master Thesis
Title: Conceptual Modelling of Civil and Military Aero-Engines
Authors: Natarajan, Subramanyam
Abstract: Statistical research has been performed on available turbofan engine configurations up to 1995 and documented by Grieb. A mathematical model is developed as a part of this thesis work to utilize the research data into predicting the parameters for 2015 and 2020 engines. This thesis work mainly focuses on modelling the polytropic efficiencies of the various components that constitute a 3-spool turbofan engine: fan, intermediate pressure compressor, high pressure compressor, high pressure turbine, intermediate pressure turbine and the low pressure turbine. An optimizer code is developed in the C programming language as a second part of this project to feed the modelled values as input to the gas turbine analysis software EVA. It then varies the design parameters like inlet mass flow, velocity ratio, pressure ratios and turbine inlet temperature continuously between two arbitrary fixed points. The specific fuel consumption at mid-cruise conditions is read from the output of EVA. Installed SFC is then calculated by taking nacelle inputs from Weico (a program to calculate engine dimensions) to get the minimal value. Design parameters at this value of installed SFC are returned into the input of EVA. Successive iterations are performed to get a global minimum value of installed SFC.
Keywords: Strömningsmekanik och akustik;Hållbar utveckling;Energi;Fluid Mechanics and Acoustics;Sustainable Development;Energy
Issue Date: 2013
Publisher: Chalmers tekniska högskola / Institutionen för tillämpad mekanik
Chalmers University of Technology / Department of Applied Mechanics
Series/Report no.: Examensarbete - Institutionen för tillämpad mekanik, Chalmers tekniska högskola : 2013:14
Collection:Examensarbeten för masterexamen // Master Theses

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