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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

An Experimental and Numerical Investigation Into Compressor Casing Heat Shield Effectiveness †

by
Andrew Pilkington
1,*,
Vinod Gopalkrishna
2,
Christopher Barnes
2,
Leo Lewis
1 and
Marko Bacic
1,2
1
Oxford Thermofluids Institute, University of Oxford, Oxford OX2 0ES , UK
2
Rolls-Royce PLC., Derby DE24 8BJ, UK
*
Author to whom correspondence should be addressed.
†
This paper is an extended version of our paper published in This manuscript is an extended version of the ETC16-164 meeting paper published in the Proceedings of the 16th European Turbomachinery Conference, Hannover, Germany, 24–28 March 2025.
Int. J. Turbomach. Propuls. Power 2026, 11(1), 9; https://doi.org/10.3390/ijtpp11010009 (registering DOI)
Submission received: 7 June 2025 / Revised: 15 July 2025 / Accepted: 21 July 2025 / Published: 2 February 2026
Versions Notes

Abstract

An investigation was conducted into the effectiveness of heat shields in an aero-engine compressor casing to slow down thermal time constants. The investigation used a combination of experimental measurements from a full-size compressor casing rig, combined with numerical analysis using CFD and thermal modelling. Experiments were performed on a compressor casing both with and without heat shielding in order to determine the heat shield effectiveness. Temperature measurements were taken throughout the casing in order to determine the thermal time constants. The experimental data was then used to validate a thermal model and CFD simulations of the compressor casing. The modelling allowed the heat transfer coefficients in the compressor casing to be determined from the experimentally measured time constants. It was found that the heat shields gave an increase in thermal time constant at each measured location. With a doubling in the time constant at some locations compared to the unshielded case. It was also found that the heat shields need to be fully sealed, as leakage flows significantly reduce their effectiveness.
Keywords: heat shield; heat transfer coefficient; compressor casing; thermal time constant heat shield; heat transfer coefficient; compressor casing; thermal time constant

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MDPI and ACS Style

Pilkington, A.; Gopalkrishna, V.; Barnes, C.; Lewis, L.; Bacic, M. An Experimental and Numerical Investigation Into Compressor Casing Heat Shield Effectiveness. Int. J. Turbomach. Propuls. Power 2026, 11, 9. https://doi.org/10.3390/ijtpp11010009

AMA Style

Pilkington A, Gopalkrishna V, Barnes C, Lewis L, Bacic M. An Experimental and Numerical Investigation Into Compressor Casing Heat Shield Effectiveness. International Journal of Turbomachinery, Propulsion and Power. 2026; 11(1):9. https://doi.org/10.3390/ijtpp11010009

Chicago/Turabian Style

Pilkington, Andrew, Vinod Gopalkrishna, Christopher Barnes, Leo Lewis, and Marko Bacic. 2026. "An Experimental and Numerical Investigation Into Compressor Casing Heat Shield Effectiveness" International Journal of Turbomachinery, Propulsion and Power 11, no. 1: 9. https://doi.org/10.3390/ijtpp11010009

APA Style

Pilkington, A., Gopalkrishna, V., Barnes, C., Lewis, L., & Bacic, M. (2026). An Experimental and Numerical Investigation Into Compressor Casing Heat Shield Effectiveness. International Journal of Turbomachinery, Propulsion and Power, 11(1), 9. https://doi.org/10.3390/ijtpp11010009

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