On the trade-off between aviation NOx and energy efficiency
2017 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 185, 1506-1516 p.Article in journal (Refereed) Published
This study aims to assess the trade-off between the ever-increasing energy efficiency of modern aero-engines and their performance. The work builds on performance models previously developed to optimise the specific fuel consumption of future aero-engine designs. As part of the present work a simple and adaptable emissions correlation for Rich-burn Quick-quench Lean-burn combustor designs is derived. The proposed model is computationally inexpensive and sufficiently accurate for use in aero-engine multi-disciplinary conceptual design tools. Furthermore, it is possible to adapt the correlation to model the emissions of combustors designed for very aggressive future cycles. An approach to lean-burn combustor emissions modelling is also presented. The simulation results show that improving engine propulsive efficiency is likely to have a benign effect on emissions at high altitude; at sea-level conditions emissions are particularly likely to reduce. Improving engine thermal efficiency however has a detrimental effect on emissions from RQL combustors, both at high altitude and particularly at sea-level conditions. LDI combustor technology does not demonstrate such behaviour. Current legislation permits trading emissions engine efficiency and hence reduce emissions. If we are to reduce the contribution of aviation to global warming, however, future certification legislation may need to become more stringent and comprehensive.
Place, publisher, year, edition, pages
2017. Vol. 185, 1506-1516 p.
NOx; Performance; Rich-burn Quick-quench Lean-burn combustor; Gas turbine; Lean direct injection; Aircraft Engine
Aerospace Engineering Energy Engineering Energy Systems
Research subject Energy- and Environmental Engineering
IdentifiersURN: urn:nbn:se:mdh:diva-33989DOI: 10.1016/j.apenergy.2015.12.055ISI: 000390494800053ScopusID: 2-s2.0-85004011343OAI: oai:DiVA.org:mdh-33989DiVA: diva2:1049969
7th International Conference on Applied Energy (ICAE), Abu Dhabi, U ARAB EMIRATES, MAR 28-31, 2015
FunderEU, FP7, Seventh Framework Programme