Reduction in emissions is strongly linked with the improvement of engine specific fuel consumption, as well as the reduction in engine nacelle drag and weight. Conventional turbofan designs, however, that reduce emissions—such as increased overall pressure ratio designs—can increase the production of emissions. In the present work, funded by the European Framework 6 collaborative project NEW Aero engine Core concepts (NEWAC), an aero-engine multidisciplinary design tool, Techno-economic, Environmental, and Risk Assessment for 2020 (TERA2020), has been utilized to study the potential benefits from introducing heat-exchanged cores in future turbofan engine designs. The tool comprises of various modules covering a wide range of disciplines: engine performance, engine aerodynamic and mechanical design, aircraft design and performance, emissions prediction and environmental impact, engine and airframe noise, as well as production, maintenance and direct operating costs. Fundamental performance differences between heat-exchanged cores and a conventional core are discussed and quantified. Cycle limitations imposed by mechanical considerations, operational limitations and emissions legislation are also discussed. The research work presented in this paper concludes with a full assessment at aircraft system level that reveals the significant potential performance benefits for the intercooled and intercooled recuperated cycles. An intercooled core can be designed for a significantly higher overall pressure ratio and with reduced cooling air requirements, providing a higher thermal efficiency than could otherwise be practically achieved with a conventional core. Variable geometry can be implemented to optimize the use of the intercooler for a given flight mission. An intercooled recuperated core can provide high thermal efficiency at low overall pressure ratio values and also benefit significantly from the introduction of a variable geometry low pressure turbine. The necessity of introducing novel lean-burn combustion technology to reduce emissions at cruise as well as for the landing and take-off cycle, is demonstrated for both heat-exchanged cores and conventional designs. Significant benefits in terms of reduction are predicted from the introduction of a variable geometry low pressure turbine in an intercooled core with lean-burn combustion technology.
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e-mail: k.kyprianidis@cranfield.ac.uk
e-mail: tomas.gronstedt@chalmers.se
e-mail: s.ogaji@cranfield.ac.uk
e-mail: p.pilidis@cranfield.ac.uk
e-mail: r.singh@cranfield.ac.uk
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January 2011
Research Papers
Assessment of Future Aero-engine Designs With Intercooled and Intercooled Recuperated Cores
Konstantinos G. Kyprianidis,
Konstantinos G. Kyprianidis
Department of Power and Propulsion,
e-mail: k.kyprianidis@cranfield.ac.uk
Cranfield University
, Bedfordshire MK43 0AL, UK
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Tomas Grönstedt,
Tomas Grönstedt
Department of Applied Mechanics, Division of Fluid Dynamics,
e-mail: tomas.gronstedt@chalmers.se
Chalmers University of Technology
, Gothenburg 41296, Sweden
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S. O. T. Ogaji,
S. O. T. Ogaji
Department of Power and Propulsion,
e-mail: s.ogaji@cranfield.ac.uk
Cranfield University
, Bedfordshire MK43 0AL, UK
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P. Pilidis,
P. Pilidis
Department of Power and Propulsion,
e-mail: p.pilidis@cranfield.ac.uk
Cranfield University
, Bedfordshire MK43 0AL, UK
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R. Singh
R. Singh
Department of Power and Propulsion,
e-mail: r.singh@cranfield.ac.uk
Cranfield University
, Bedfordshire MK43 0AL, UK
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Konstantinos G. Kyprianidis
Department of Power and Propulsion,
Cranfield University
, Bedfordshire MK43 0AL, UKe-mail: k.kyprianidis@cranfield.ac.uk
Tomas Grönstedt
Department of Applied Mechanics, Division of Fluid Dynamics,
Chalmers University of Technology
, Gothenburg 41296, Swedene-mail: tomas.gronstedt@chalmers.se
S. O. T. Ogaji
Department of Power and Propulsion,
Cranfield University
, Bedfordshire MK43 0AL, UKe-mail: s.ogaji@cranfield.ac.uk
P. Pilidis
Department of Power and Propulsion,
Cranfield University
, Bedfordshire MK43 0AL, UKe-mail: p.pilidis@cranfield.ac.uk
R. Singh
Department of Power and Propulsion,
Cranfield University
, Bedfordshire MK43 0AL, UKe-mail: r.singh@cranfield.ac.uk
J. Eng. Gas Turbines Power. Jan 2011, 133(1): 011701 (10 pages)
Published Online: September 14, 2010
Article history
Received:
April 7, 2010
Revised:
April 11, 2010
Online:
September 14, 2010
Published:
September 14, 2010
Citation
Kyprianidis, K. G., Grönstedt, T., Ogaji, S. O. T., Pilidis, P., and Singh, R. (September 14, 2010). "Assessment of Future Aero-engine Designs With Intercooled and Intercooled Recuperated Cores." ASME. J. Eng. Gas Turbines Power. January 2011; 133(1): 011701. https://doi.org/10.1115/1.4001982
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