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On the trade-off between minimum fuel burn and maximum time between overhaul for an intercooled aeroengine
Cranfield University, UK.
Mälardalen University, School of Business, Society and Engineering, Future Energy Center. Cranfield University, UK. (Future Energy Center)ORCID iD: 0000-0002-8466-356X
Cranfield University, UK.
Cranfield University, UK.
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2014 (English)In: Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, ISSN 0954-4100, Vol. 228, no 13, 2424-2438 p.Article in journal (Refereed) Published
Abstract [en]

A large variety of promising power and propulsion system concepts are being proposed to reduce carbon dioxide and other emissions. However, the best candidate to pursue is difficult to select and it is imperative that major investments are correctly targeted to deliver environmentally friendly, economical and reliable solutions. To conceive and assess gas turbine engines with minimum environmental impact and lowest cost of ownership in a variety of emission legislation scenarios and emissions taxation policies, a tool based on a techno-economic and environmental risk assessment methodology is required. A tool based on this approach has been developed by the authors. The core of the tool is a detailed and rigorous thermodynamic representation of power plants, around which other modules can be coupled (that model different disciplines such as aircraft performance, economics, emissions, noise, weight and cost) resulting in a multidisciplinary framework. This approach can be used for efficient and cost-effective design space exploration in the civil aviation, power generation, marine, and oil and gas fields. In the present work, a conceptual intercooled core aeroengine design was assessed with component technologies consistent with 2020 entry into service via a multidisciplinary optimisation approach. Such an approach is necessary to assess the trade-off between asset life, operating costs and technical specification. This paper examines the influence of fuel consumption, engine weight and direct operating costs with respect to extending the engine life. The principal modes of failure such as creep, fatigue and oxidation, are considered in the engine life estimation. Multidisciplinary optimisation, comprising the main engine design parameters, was carried out with maximum time between overhaul as the objective function. The trade-off between minimum block fuel burn and maximum engine life was examined; the results were compared against the initial engine design and an assessment was made to identify the design changes required for obtaining an improved engine design in terms of direct operating costs. The results obtained from the study demonstrate that an engine optimised for maximum time between overhaul requires a lower overall pressure ratio and specific thrust but this comes at the cost of lower thermal efficiency and higher engine production costs.

Place, publisher, year, edition, pages
IMechE, 2014. Vol. 228, no 13, 2424-2438 p.
Keyword [en]
Gas Turbine, Turbomachinery, Aircraft Engine, Intercooling
National Category
Aerospace Engineering Energy Engineering
Research subject
Energy- and Environmental Engineering; Innovation and Design
Identifiers
URN: urn:nbn:se:mdh:diva-25080DOI: 10.1177/0954410013518509Scopus ID: 2-s2.0-84908676296OAI: oai:DiVA.org:mdh-25080DiVA: diva2:739340
Available from: 2014-08-20 Created: 2014-05-28 Last updated: 2016-05-16Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
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