Numerical simulation of influence of eccentric needle movement on internal flow characteristics of groove-type voc nozzle
The VOC nozzle of the diesel engine is affected by the dynamic characteristics of the needle, and the flow and injection characteristics of each hole are significantly different. In order to improve the spray characteristics of the VOC fuel nozzle, a nozzle structure design is proposed, the main fea...
| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English English |
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Institution of Engineering and Technology
2022
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| Online Access: | http://umpir.ump.edu.my/id/eprint/41952/ http://umpir.ump.edu.my/id/eprint/41952/1/Numerical%20simulation%20of%20influence%20of%20eccentric%20needle.pdf http://umpir.ump.edu.my/id/eprint/41952/2/Numerical%20simulation%20of%20influence%20of%20eccentric%20needle%20movement%20on%20internal%20flow%20characteristics%20of%20groove-type%20voc%20nozzle_ABS.pdf |
| _version_ | 1848826478217658368 |
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| author | Lu, Hongkun Muhamad, Mat Noor Kadirgama, Kumaran |
| author_facet | Lu, Hongkun Muhamad, Mat Noor Kadirgama, Kumaran |
| author_sort | Lu, Hongkun |
| building | UMP Institutional Repository |
| collection | Online Access |
| description | The VOC nozzle of the diesel engine is affected by the dynamic characteristics of the needle, and the flow and injection characteristics of each hole are significantly different. In order to improve the spray characteristics of the VOC fuel nozzle, a nozzle structure design is proposed, the main feature is that there is an annular pressure groove on the sealing cone of the needle. In order to study the internal flow characteristics of this structure, a two-fluid model considering the eccentric motion of the needle was established. The results show that the eccentric movement of the needle leads to significant differences in the flow and injection characteristics of each hole. The development of the cavity in hole #1㸦on the side of the needle deviation is earlier than that of hole #2㸦on the deviation side, and the mass flow rate is also larger. After the needle is raised to 100μm, the mass flow rate and flow field characteristics of the nozzle with an annular groove are better than those of the nozzle without the needle groove. The groove structure of the needle acts as a pressure chamber, which is beneficial to weaken the adverse effect of the eccentric movement of the needle on hole #2. |
| first_indexed | 2025-11-15T03:45:27Z |
| format | Conference or Workshop Item |
| id | ump-41952 |
| institution | Universiti Malaysia Pahang |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T03:45:27Z |
| publishDate | 2022 |
| publisher | Institution of Engineering and Technology |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | ump-419522024-08-30T00:21:55Z http://umpir.ump.edu.my/id/eprint/41952/ Numerical simulation of influence of eccentric needle movement on internal flow characteristics of groove-type voc nozzle Lu, Hongkun Muhamad, Mat Noor Kadirgama, Kumaran T Technology (General) TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics The VOC nozzle of the diesel engine is affected by the dynamic characteristics of the needle, and the flow and injection characteristics of each hole are significantly different. In order to improve the spray characteristics of the VOC fuel nozzle, a nozzle structure design is proposed, the main feature is that there is an annular pressure groove on the sealing cone of the needle. In order to study the internal flow characteristics of this structure, a two-fluid model considering the eccentric motion of the needle was established. The results show that the eccentric movement of the needle leads to significant differences in the flow and injection characteristics of each hole. The development of the cavity in hole #1㸦on the side of the needle deviation is earlier than that of hole #2㸦on the deviation side, and the mass flow rate is also larger. After the needle is raised to 100μm, the mass flow rate and flow field characteristics of the nozzle with an annular groove are better than those of the nozzle without the needle groove. The groove structure of the needle acts as a pressure chamber, which is beneficial to weaken the adverse effect of the eccentric movement of the needle on hole #2. Institution of Engineering and Technology 2022 Conference or Workshop Item PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/41952/1/Numerical%20simulation%20of%20influence%20of%20eccentric%20needle.pdf pdf en http://umpir.ump.edu.my/id/eprint/41952/2/Numerical%20simulation%20of%20influence%20of%20eccentric%20needle%20movement%20on%20internal%20flow%20characteristics%20of%20groove-type%20voc%20nozzle_ABS.pdf Lu, Hongkun and Muhamad, Mat Noor and Kadirgama, Kumaran (2022) Numerical simulation of influence of eccentric needle movement on internal flow characteristics of groove-type voc nozzle. In: IET Conference Proceedings. 2022 Engineering Technology International Conference, ETIC 2022 , 7 - 8 September 2022 , Kuantan, Virtual. pp. 447-457., 2022 (22). ISSN 27324494 ISBN 978-183953782-0 (Published) https://doi.org/10.1049/icp.2022.2660 |
| spellingShingle | T Technology (General) TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics Lu, Hongkun Muhamad, Mat Noor Kadirgama, Kumaran Numerical simulation of influence of eccentric needle movement on internal flow characteristics of groove-type voc nozzle |
| title | Numerical simulation of influence of eccentric needle movement on internal flow characteristics of groove-type voc nozzle |
| title_full | Numerical simulation of influence of eccentric needle movement on internal flow characteristics of groove-type voc nozzle |
| title_fullStr | Numerical simulation of influence of eccentric needle movement on internal flow characteristics of groove-type voc nozzle |
| title_full_unstemmed | Numerical simulation of influence of eccentric needle movement on internal flow characteristics of groove-type voc nozzle |
| title_short | Numerical simulation of influence of eccentric needle movement on internal flow characteristics of groove-type voc nozzle |
| title_sort | numerical simulation of influence of eccentric needle movement on internal flow characteristics of groove-type voc nozzle |
| topic | T Technology (General) TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics |
| url | http://umpir.ump.edu.my/id/eprint/41952/ http://umpir.ump.edu.my/id/eprint/41952/ http://umpir.ump.edu.my/id/eprint/41952/1/Numerical%20simulation%20of%20influence%20of%20eccentric%20needle.pdf http://umpir.ump.edu.my/id/eprint/41952/2/Numerical%20simulation%20of%20influence%20of%20eccentric%20needle%20movement%20on%20internal%20flow%20characteristics%20of%20groove-type%20voc%20nozzle_ABS.pdf |