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On the Real-time Estimation of Disc Temperature Spatial Distributions in Aeroengines

[+] Author and Article Information
Andrew Van Paridon

Osney Thermo-Fluids Laboratory, Department of Engineering Science, University of Oxford, Osney Mead, Oxford, OX2 0ES, United Kingdom
andrew.vanparidon@eng.ox.ac.uk

Marko Bacic

Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ, United Kingdom
marko.bacic@eng.ox.ac.uk

Peter Ireland

Department of Engineering Science Osney Mead Oxford, OX2 0ES United Kingdom
peter.ireland@eng.ox.ac.uk

Ron Daniel

Department of Engineering Science Parks Road Oxford, OX1 3PJ United Kingdom
ronald.daniel@bnc.ox.ac.uk

1Corresponding author.

ASME doi:10.1115/1.4037870 History: Received May 12, 2017; Revised July 25, 2017

Abstract

This paper presents a novel approach to real-time modelling of disc temperature distribution using proper orthogonal decomposition. The method combines singular value decomposition techniques with a series of low order transfer functions to predict the disc's thermal response over a typical flight. The model uses only typically available FADEC measurements to predict temperature with accuracy of +/-30K over the whole flight cycle. A Kalman filter has also been developed based on a single temperature measurement, and the location of the measurement has been assessed in order to select the most appropriate target for instrumentation. Points all around the front and back of the disc have been assessed, and the best practice result is found to be near the centre of the disc neck. This represents a compromise between matching the fast dynamic response of the rim, with the slower dynamics of the cob. The new model has been validated against an independent flight simulation.

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