23rd Congress of International Council of the Aeronautical Sciences, 8-13 September, 2002, Toronto, Canada
Paper ICAS 2002-R79

INFLUENCE OF INLET PROFILE ON HIGH-BPRTURBOFAN PERFORMANCE USING A RADIALPROFILE MAP

J. Yin, P. Pilidis
Cranfield University, UK

Keywords: gas turbine performance, high bypass ratio fan, fan characteristic intake model, distortion

A radial-profile based high-bypass ratio turbofan performance model was developed in order to predict civil aircraft engine performance accurately. In this model, the fan of the high bypass ratio engine has been represented using a radial-profile performance characteristic map. It describes with accuracy the strong radial profiles of all thermodynamic variables very well. It is common to average these profiles so that the fan can be represented by one or two one-dimensional characteristics. In this study, a simple intake model was developed in order to obtain inlet radial profiles for fan rotors. The inlet radial profiles are dependent on the fan mass flow and intake geometry as well as flight condition. The aim is to study the influence of inlet radial profiles on a high-bypass turbofan engine performance. The results are compared with and without using inlet profiles. The results show a reduction in thrust and increase in specific fuel consumption.

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