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Simulation of direct injection, mixing and combustion of CNG fuel in a single - cylinder engine with different injector orientations using CFD

The direct injection system is widely used in the automotive industry, especially for performance enhancement and cleaner emissions. The study proposed a direct injection system in a small, single-cylinder compressed natural gas engine. However, its compactness provides a minimum space for direct in...

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Main Authors: Mohd Azlan Fahmi, Muhammad Azmi, Mohd Fadzil, Abdul Rahim, Rizalman, Mamat
Format: Conference or Workshop Item
Language:English
English
Published: Institution of Engineering and Technology 2022
Subjects:
T Technology (General)
TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
TL Motor vehicles. Aeronautics. Astronautics
Online Access:http://umpir.ump.edu.my/id/eprint/42090/1/Simulation%20of%20direct%20injection%2C%20mixing%20and%20combustion%20of%20CNG.pdf
http://umpir.ump.edu.my/id/eprint/42090/2/Simulation%20of%20direct%20injection%2C%20mixing%20and%20combustion%20of%20CNG%20fuel%20in%20a%20single-cylinder%20engine%20with%20different%20injector%20orientations%20using%20CFD_ABS.pdf
http://umpir.ump.edu.my/id/eprint/42090/
https://doi.org/10.1049/icp.2022.2575
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spelling my.ump.umpir.420902024-09-30T04:43:31Z http://umpir.ump.edu.my/id/eprint/42090/ Simulation of direct injection, mixing and combustion of CNG fuel in a single - cylinder engine with different injector orientations using CFD Mohd Azlan Fahmi, Muhammad Azmi Mohd Fadzil, Abdul Rahim Rizalman, Mamat T Technology (General) TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics The direct injection system is widely used in the automotive industry, especially for performance enhancement and cleaner emissions. The study proposed a direct injection system in a small, single-cylinder compressed natural gas engine. However, its compactness provides a minimum space for direct injector installation. Therefore, a suitable injector orientation that meets space availability and is practically effective must be determined. The main objective is to determine the best injector orientation for the direct injection process using computational fluid dynamics by analysing the effect of top and side injection on the cylinder flow pattern, in-cylinder pressure and temperature. The analysis was performed by using Ansys Fluent. The dynamic mesh strategy is utilised to ensure a realistic solution of in-cylinder flow, gaseous injection, mixing and combustion. Based on the visualisation results, it is found that the injector orientation affects the overall injected mass of fuel by deteriorating the injection penetration, injection velocity and spray cone, as demonstrated by the top injection case. As a result, the methane mass fraction in the cylinder is reduced. The plotted results showed the side injection has a higher cold flow and combustion pressure and temperature with values of 112.38 bar and 3834.3 K, while the top injection has 98.99 bar and 2381.1 K. Even though the simulation overpredicted the pressure and temperature for both cases, because of inaccurate convective heat transfer solution, the resultant pressures and temperatures provide a valuable indication of how the injector orientation affects the overall direct injection of natural gas engine's performance. In the current study, the side injection performed better than the top injection. The side injection produced a higher pressure and temperature because the higher mass was transferred during the side injection. The study provided valuable insights into the ideal direct injection of compressed natural gas. Institution of Engineering and Technology 2022 Conference or Workshop Item PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/42090/1/Simulation%20of%20direct%20injection%2C%20mixing%20and%20combustion%20of%20CNG.pdf pdf en http://umpir.ump.edu.my/id/eprint/42090/2/Simulation%20of%20direct%20injection%2C%20mixing%20and%20combustion%20of%20CNG%20fuel%20in%20a%20single-cylinder%20engine%20with%20different%20injector%20orientations%20using%20CFD_ABS.pdf Mohd Azlan Fahmi, Muhammad Azmi and Mohd Fadzil, Abdul Rahim and Rizalman, Mamat (2022) Simulation of direct injection, mixing and combustion of CNG fuel in a single - cylinder engine with different injector orientations using CFD. In: IET Conference Proceedings. 2022 Engineering Technology International Conference, ETIC 2022 , 7 - 8 September 2022 , Kuantan, Virtual. pp. 83-90., 2022 (22). ISSN 2732-4494 ISBN 978-183953782-0 (Published) https://doi.org/10.1049/icp.2022.2575
institution Universiti Malaysia Pahang Al-Sultan Abdullah
building UMPSA Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang Al-Sultan Abdullah
content_source UMPSA Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
English
topic T Technology (General)
TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
TL Motor vehicles. Aeronautics. Astronautics
spellingShingle T Technology (General)
TA Engineering (General). Civil engineering (General)
TJ Mechanical engineering and machinery
TL Motor vehicles. Aeronautics. Astronautics
Mohd Azlan Fahmi, Muhammad Azmi
Mohd Fadzil, Abdul Rahim
Rizalman, Mamat
Simulation of direct injection, mixing and combustion of CNG fuel in a single - cylinder engine with different injector orientations using CFD
description The direct injection system is widely used in the automotive industry, especially for performance enhancement and cleaner emissions. The study proposed a direct injection system in a small, single-cylinder compressed natural gas engine. However, its compactness provides a minimum space for direct injector installation. Therefore, a suitable injector orientation that meets space availability and is practically effective must be determined. The main objective is to determine the best injector orientation for the direct injection process using computational fluid dynamics by analysing the effect of top and side injection on the cylinder flow pattern, in-cylinder pressure and temperature. The analysis was performed by using Ansys Fluent. The dynamic mesh strategy is utilised to ensure a realistic solution of in-cylinder flow, gaseous injection, mixing and combustion. Based on the visualisation results, it is found that the injector orientation affects the overall injected mass of fuel by deteriorating the injection penetration, injection velocity and spray cone, as demonstrated by the top injection case. As a result, the methane mass fraction in the cylinder is reduced. The plotted results showed the side injection has a higher cold flow and combustion pressure and temperature with values of 112.38 bar and 3834.3 K, while the top injection has 98.99 bar and 2381.1 K. Even though the simulation overpredicted the pressure and temperature for both cases, because of inaccurate convective heat transfer solution, the resultant pressures and temperatures provide a valuable indication of how the injector orientation affects the overall direct injection of natural gas engine's performance. In the current study, the side injection performed better than the top injection. The side injection produced a higher pressure and temperature because the higher mass was transferred during the side injection. The study provided valuable insights into the ideal direct injection of compressed natural gas.
format Conference or Workshop Item
author Mohd Azlan Fahmi, Muhammad Azmi
Mohd Fadzil, Abdul Rahim
Rizalman, Mamat
author_facet Mohd Azlan Fahmi, Muhammad Azmi
Mohd Fadzil, Abdul Rahim
Rizalman, Mamat
author_sort Mohd Azlan Fahmi, Muhammad Azmi
title Simulation of direct injection, mixing and combustion of CNG fuel in a single - cylinder engine with different injector orientations using CFD
title_short Simulation of direct injection, mixing and combustion of CNG fuel in a single - cylinder engine with different injector orientations using CFD
title_full Simulation of direct injection, mixing and combustion of CNG fuel in a single - cylinder engine with different injector orientations using CFD
title_fullStr Simulation of direct injection, mixing and combustion of CNG fuel in a single - cylinder engine with different injector orientations using CFD
title_full_unstemmed Simulation of direct injection, mixing and combustion of CNG fuel in a single - cylinder engine with different injector orientations using CFD
title_sort simulation of direct injection, mixing and combustion of cng fuel in a single - cylinder engine with different injector orientations using cfd
publisher Institution of Engineering and Technology
publishDate 2022
url http://umpir.ump.edu.my/id/eprint/42090/1/Simulation%20of%20direct%20injection%2C%20mixing%20and%20combustion%20of%20CNG.pdf
http://umpir.ump.edu.my/id/eprint/42090/2/Simulation%20of%20direct%20injection%2C%20mixing%20and%20combustion%20of%20CNG%20fuel%20in%20a%20single-cylinder%20engine%20with%20different%20injector%20orientations%20using%20CFD_ABS.pdf
http://umpir.ump.edu.my/id/eprint/42090/
https://doi.org/10.1049/icp.2022.2575
_version_ 1822924683969822720
score 13.23243

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