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Adaptive Cycle Engines: Results with 2nd Generation Combustion Model
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 29, 2022 by SAE International in United States
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A more accurate combustion model, based on Fluent simulations including the effect of flame stretching and extinction, has been added to cycle and road simulations of an Adaptive Cycle Engine (ACE), where compressions and expansions do not follow a predefined sequence. Also, engine speed data from the Argonne Downloadable Dynamometer Database is used in the road simulations in lieu of the original constant-speed model. Results show a drop in predicted steady-state brake efficiency and bmep around 15% relative to the model using a standard Wiebe function for heat release rate. Performance on road cycles is not greatly affected by the delayed combustion since the relationship between expansion mass and work is largely unchanged. Even with the refined model, future ACE-equipped vehicles are expected to be competitive with electric powertrains in pre-tax cost and overall emissions.
CitationRuiz, F., "Adaptive Cycle Engines: Results with 2nd Generation Combustion Model," SAE Technical Paper 2022-01-0421, 2022, https://doi.org/10.4271/2022-01-0421.
- Ruiz , F. The Adaptive Cycle Engines SAE Technical Paper 2018-01-0883 2018 https://doi.org/10.4271/2018-01-0883
- Ruiz , F. The Adaptive Cycle Engine on Standard Duty Cycles SAE Technical Paper 2019-01-0232 2019 https://doi.org/10.4271/2019-01-0232
- Tamilselvam , P. and Ruiz , F. Stability of Flowing Combustion in Adaptive Cycle Engines SAE Technical Paper 2020-01-0296 2020 https://doi.org/10.4271/2020-01-0296
- Argonne National Laboratory https://www.anl.gov/es/downloadable-dynamometer-database