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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...

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Main Authors: Mahmood, Hussein Adel, Adam, Nor Mariah, Sahari, Barkawi, Masuri, Siti Ujila
Format: Article
Language:English
Published: American Scientific Publishers 2017
Online Access:http://psasir.upm.edu.my/id/eprint/61302/1/61302.pdf
http://psasir.upm.edu.my/id/eprint/61302/
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spelling my.upm.eprints.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
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
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.
format Article
author Mahmood, Hussein Adel
Adam, Nor Mariah
Sahari, Barkawi
Masuri, Siti Ujila
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
author_facet Mahmood, Hussein Adel
Adam, Nor Mariah
Sahari, Barkawi
Masuri, Siti Ujila
author_sort Mahmood, Hussein Adel
title 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_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_sort design of compressed natural gas-air mixer for dual fuel engine using three-dimensional computational fluid dynamics modeling
publisher American Scientific Publishers
publishDate 2017
url http://psasir.upm.edu.my/id/eprint/61302/1/61302.pdf
http://psasir.upm.edu.my/id/eprint/61302/
_version_ 1669008804565483520
score 13.211869

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