Design of compressed natural gas-air mixer for dual fuel engine using three-dimensional computational fluid dynamics modeling
In diesel—compressed natural gas (CNG) dual fuel systems, the CNG is generally inducted into the intake manifold by a CNG mixer mounted at the intake manifold, while the diesel fuel is directly injected into the engine cylinder using a diesel fuel injector system. The poor mixing performance of gase...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Scientific Publishers
2017
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| Online Access: | http://psasir.upm.edu.my/id/eprint/61302/ http://psasir.upm.edu.my/id/eprint/61302/1/61302.pdf |
| _version_ | 1848854387002179584 |
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| author | Mahmood, Hussein Adel Adam, Nor Mariah Sahari, Barkawi Masuri, Siti Ujila |
| author_facet | Mahmood, Hussein Adel Adam, Nor Mariah Sahari, Barkawi Masuri, Siti Ujila |
| author_sort | Mahmood, Hussein Adel |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | In diesel—compressed natural gas (CNG) dual fuel systems, the CNG is generally inducted into the intake manifold by a CNG mixer mounted at the intake manifold, while the diesel fuel is directly injected into the engine cylinder using a diesel fuel injector system. The poor mixing performance of gaseous mixers is among the causes of unsatisfactory engine performance and lethal exhaust emissions. Based on an existing mixer model, four different models of mixers with 29 cases were created in this study to investigate the effects of the diameter, location, and number of holes inside the existing mixer on the homogeneity and distribution of the mixture. A computational fluid dynamics analysis software was used to check the flow behavior of the CNG and air inside the existing and new mixer models, with the new model being fixed on a 3.2 L engine. These models were examined depending on the maximum speed of the engine (4000 rpm), the full-opened valve, and the stoichiometric air–fuel ratio (34.6). Compared with the new mixer models, the existing mixer model shows a non-uniform methane and air distribution. Model 4/case 26 shows a uniform distribution of the CNG-air mixture with the best homogeneity. This model was then examined to check the flow characteristics of CNG and air at different engine speeds (1000, 2000, 3000, and 4000 rpm). Model 4/case 26 also shows a stoichiometric air–fuel ratio depending on the engine speed. |
| first_indexed | 2025-11-15T11:09:03Z |
| format | Article |
| id | upm-61302 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T11:09:03Z |
| publishDate | 2017 |
| publisher | American Scientific Publishers |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-613022020-05-14T07:58:39Z http://psasir.upm.edu.my/id/eprint/61302/ Design of compressed natural gas-air mixer for dual fuel engine using three-dimensional computational fluid dynamics modeling Mahmood, Hussein Adel Adam, Nor Mariah Sahari, Barkawi Masuri, Siti Ujila In diesel—compressed natural gas (CNG) dual fuel systems, the CNG is generally inducted into the intake manifold by a CNG mixer mounted at the intake manifold, while the diesel fuel is directly injected into the engine cylinder using a diesel fuel injector system. The poor mixing performance of gaseous mixers is among the causes of unsatisfactory engine performance and lethal exhaust emissions. Based on an existing mixer model, four different models of mixers with 29 cases were created in this study to investigate the effects of the diameter, location, and number of holes inside the existing mixer on the homogeneity and distribution of the mixture. A computational fluid dynamics analysis software was used to check the flow behavior of the CNG and air inside the existing and new mixer models, with the new model being fixed on a 3.2 L engine. These models were examined depending on the maximum speed of the engine (4000 rpm), the full-opened valve, and the stoichiometric air–fuel ratio (34.6). Compared with the new mixer models, the existing mixer model shows a non-uniform methane and air distribution. Model 4/case 26 shows a uniform distribution of the CNG-air mixture with the best homogeneity. This model was then examined to check the flow characteristics of CNG and air at different engine speeds (1000, 2000, 3000, and 4000 rpm). Model 4/case 26 also shows a stoichiometric air–fuel ratio depending on the engine speed. American Scientific Publishers 2017-07 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/61302/1/61302.pdf Mahmood, Hussein Adel and Adam, Nor Mariah and Sahari, Barkawi and Masuri, Siti Ujila (2017) Design of compressed natural gas-air mixer for dual fuel engine using three-dimensional computational fluid dynamics modeling. Journal of Computational and Theoretical Nanoscience, 14 (7). pp. 3125-3142. ISSN 1546-1955; ESSN: 1546-1963 10.1166/jctn.2017.6605 |
| spellingShingle | Mahmood, Hussein Adel Adam, Nor Mariah Sahari, Barkawi Masuri, Siti Ujila Design of compressed natural gas-air mixer for dual fuel engine using three-dimensional computational fluid dynamics modeling |
| title | Design of compressed natural gas-air mixer for dual fuel engine using three-dimensional computational fluid dynamics modeling |
| title_full | Design of compressed natural gas-air mixer for dual fuel engine using three-dimensional computational fluid dynamics modeling |
| title_fullStr | Design of compressed natural gas-air mixer for dual fuel engine using three-dimensional computational fluid dynamics modeling |
| title_full_unstemmed | Design of compressed natural gas-air mixer for dual fuel engine using three-dimensional computational fluid dynamics modeling |
| title_short | Design of compressed natural gas-air mixer for dual fuel engine using three-dimensional computational fluid dynamics modeling |
| title_sort | design of compressed natural gas-air mixer for dual fuel engine using three-dimensional computational fluid dynamics modeling |
| url | http://psasir.upm.edu.my/id/eprint/61302/ http://psasir.upm.edu.my/id/eprint/61302/ http://psasir.upm.edu.my/id/eprint/61302/1/61302.pdf |