Turbofan engine weight estimation for preliminary design

Abstract

The aim of the study is to prepare weight estimation model of turbofan engines to help designer in the conceptual stages of modem turbofan design. To achieve this purpose, statistical data is used on yielding robust analytical expression and experiments are conducted to prepare model for turbofan engine weight estimation is not easy due to the high cost and insufficient technical facility. Turbofan engine classified into five categories (three shaft turbofan engine, light weight two shaft turbofan engine, medium weight two shaft turbofan engine, high weight two shaft turbofan engine and two shaft geared turbofan engine) and turbofan engine weight model is developed for each category separately to increase model sensitivity. Model sensitivity is investigated for each category by error analysis to give idea about model reflection of real world to conceptual designer.