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| Format: | Recurso digital |
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Zenodo
2024
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| Online Access: | https://doi.org/10.5281/zenodo.14946610 |
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Table of Contents:
- <p>Efficiency improvements and non-CO2 abatement are the key targets for reduced climate impact of advanced aircraft propulsion systems. This presentation provides an insight into propulsion technology options for climate-compliant aircraft design. In order to minimise climate impact, design and technology need to address the short-to-medium range (SMR) and long range (LR) market segments. Therefore, gas turbine technology remains the backbone of advanced propulsion for large aircraft. Revolutionary heat engine concepts building upon advanced gas turbine technology, such as the Composite Cycle Engine, may provide superb thermal efficiency but face great NOx challenges. The use of hydrogen fuel brings significant non-CO2 reduction potentials via advanced fuel cells. With clear limits in specific power at the system level, pure fuel cell based propulsion seems to be bound to small and regional turboprops. Hybrid systems that combine advanced fuel cell and gas turbine technology, however, may leverage fuel cell technology also for higher power classes. Water-integrated hybrid concepts utilise the fuel cell product water as a highly effective means for gas turbine NOx abatement and performance enhancement while the fuel cell electric power output can serve various onboard customers. Depending on the fuel cell size, scenarios ranging from a mere supply of the aircraft subsystems all the way up to most radical single gas turbine propulsion systems are conceivable. Pre-conceptual analysis shows: Propulsion system configurations featuring only a single gas turbine engine might be particularly attractive for SMR aircraft. Hybrid power systems with the fuel cell powering an aft-fuselage boundary layer ingesting fan could be highly efficient for LR applications as drag penalties from the onboard storage of liquid hydrogen can be counteracted most efficiently by such an arrangement.</p>