Evaluation of a Semiempirical, Zero-Dimensional, Multizone Model to Predict Nitric Oxide Emissions in DI Diesel Engines’ Combustion Chamber
In the present study, a semiempirical, zero-dimensional multizone model, developed by the authors, is implemented on two automotive diesel engines, a heavy-duty truck engine and a light-duty passenger car engine with pilot fuel injection, for various operating conditions including variation of power...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Journal of Combustion |
| Online Access: | http://dx.doi.org/10.1155/2016/6202438 |
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| author | Nicholas S. Savva Dimitrios T. Hountalas |
| author_facet | Nicholas S. Savva Dimitrios T. Hountalas |
| author_sort | Nicholas S. Savva |
| collection | DOAJ |
| description | In the present study, a semiempirical, zero-dimensional multizone model, developed by the authors, is implemented on two automotive diesel engines, a heavy-duty truck engine and a light-duty passenger car engine with pilot fuel injection, for various operating conditions including variation of power/speed, EGR rate, fuel injection timing, fuel injection pressure, and boost pressure, to verify its capability for Nitric Oxide (NO) emission prediction. The model utilizes cylinder’s basic geometry and engine operating data and measured cylinder pressure to estimate the apparent combustion rate which is then discretized into burning zones according to the calculation step used. The requisite unburnt charge for the combustion in the zones is calculated using the zone equivalence ratio provided from a new empirical formula involving parameters derived from the processing of the measured cylinder pressure and typical engine operating parameters. For the calculation of NO formation, the extended Zeldovich mechanism is used. From this approach, the model is able to provide the evolution of NO formation inside each burned zone and, cumulatively, the cylinder’s NO formation history. As proven from the investigation conducted herein, the proposed model adequately predicts NO emissions and NO trends when the engine settings vary, with low computational cost. These encourage its use for engine control optimization regarding NOx abatement and real-time/model-based NOx control applications. |
| format | Article |
| id | doaj-art-8c9720b17d374adb81d392b2738e45fc |
| institution | Kabale University |
| issn | 2090-1968 2090-1976 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Combustion |
| spelling | doaj-art-8c9720b17d374adb81d392b2738e45fc2025-02-03T05:53:16ZengWileyJournal of Combustion2090-19682090-19762016-01-01201610.1155/2016/62024386202438Evaluation of a Semiempirical, Zero-Dimensional, Multizone Model to Predict Nitric Oxide Emissions in DI Diesel Engines’ Combustion ChamberNicholas S. Savva0Dimitrios T. Hountalas1Internal Combustion Engines Lab, National Technical University of Athens, Zografou Campus, 9 Heroon Polytechniou, 15780 Athens, GreeceInternal Combustion Engines Lab, National Technical University of Athens, Zografou Campus, 9 Heroon Polytechniou, 15780 Athens, GreeceIn the present study, a semiempirical, zero-dimensional multizone model, developed by the authors, is implemented on two automotive diesel engines, a heavy-duty truck engine and a light-duty passenger car engine with pilot fuel injection, for various operating conditions including variation of power/speed, EGR rate, fuel injection timing, fuel injection pressure, and boost pressure, to verify its capability for Nitric Oxide (NO) emission prediction. The model utilizes cylinder’s basic geometry and engine operating data and measured cylinder pressure to estimate the apparent combustion rate which is then discretized into burning zones according to the calculation step used. The requisite unburnt charge for the combustion in the zones is calculated using the zone equivalence ratio provided from a new empirical formula involving parameters derived from the processing of the measured cylinder pressure and typical engine operating parameters. For the calculation of NO formation, the extended Zeldovich mechanism is used. From this approach, the model is able to provide the evolution of NO formation inside each burned zone and, cumulatively, the cylinder’s NO formation history. As proven from the investigation conducted herein, the proposed model adequately predicts NO emissions and NO trends when the engine settings vary, with low computational cost. These encourage its use for engine control optimization regarding NOx abatement and real-time/model-based NOx control applications.http://dx.doi.org/10.1155/2016/6202438 |
| spellingShingle | Nicholas S. Savva Dimitrios T. Hountalas Evaluation of a Semiempirical, Zero-Dimensional, Multizone Model to Predict Nitric Oxide Emissions in DI Diesel Engines’ Combustion Chamber Journal of Combustion |
| title | Evaluation of a Semiempirical, Zero-Dimensional, Multizone Model to Predict Nitric Oxide Emissions in DI Diesel Engines’ Combustion Chamber |
| title_full | Evaluation of a Semiempirical, Zero-Dimensional, Multizone Model to Predict Nitric Oxide Emissions in DI Diesel Engines’ Combustion Chamber |
| title_fullStr | Evaluation of a Semiempirical, Zero-Dimensional, Multizone Model to Predict Nitric Oxide Emissions in DI Diesel Engines’ Combustion Chamber |
| title_full_unstemmed | Evaluation of a Semiempirical, Zero-Dimensional, Multizone Model to Predict Nitric Oxide Emissions in DI Diesel Engines’ Combustion Chamber |
| title_short | Evaluation of a Semiempirical, Zero-Dimensional, Multizone Model to Predict Nitric Oxide Emissions in DI Diesel Engines’ Combustion Chamber |
| title_sort | evaluation of a semiempirical zero dimensional multizone model to predict nitric oxide emissions in di diesel engines combustion chamber |
| url | http://dx.doi.org/10.1155/2016/6202438 |
| work_keys_str_mv | AT nicholasssavva evaluationofasemiempiricalzerodimensionalmultizonemodeltopredictnitricoxideemissionsindidieselenginescombustionchamber AT dimitriosthountalas evaluationofasemiempiricalzerodimensionalmultizonemodeltopredictnitricoxideemissionsindidieselenginescombustionchamber |