Mission optimization of the geared turbofan engine
Conference contribution, 2011

This paper carries out an optimization study for a conventional and a geared turbofan engine by minimizing CO2 emissions for a given aircraft mission. Aircraft performance and nacelle design data have been generated with a preliminary design and analysis tool for aircraft. Engine gas path design, mechanical layout and weight estimation as well as performance were modeled using a generic tool for gas turbine design, analysis and optimization. Although earlier studies have been made where the specific fuel consumption for the different engine configurations have been compared [1] there is a need for a study where the relative merits of a geared and a conventional turbofan are compared for a given mission. Results show that the geared turbofan can reach a 3% lower fuel consumption for the calculated mission.

fuel consumption

Geared turbofan

gas turbine



aircraft engine



Linda Larsson

Chalmers, Applied Mechanics, Fluid Dynamics

Rickard Avellan

Chalmers, Applied Mechanics, Fluid Dynamics

Tomas Grönstedt

Chalmers, Applied Mechanics, Fluid Dynamics

International Society for Airbreathing Engines, ISABE, Gothenburg, 2011, (ISABE-2011-1314)

Subject Categories

Mechanical Engineering

Driving Forces

Sustainable development

Areas of Advance


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