Effect of Reynolds number on the wake of a Next-Generation High-Speed Train using CFD analysis
Improvement to the next-generation high-speed train (NG-HST) is ongoing particularly in achieving a higher operating speed. Consequently, the aerodynamic effect of the train will be more critical as it affects the development of a wake flow characterized by complex and unsteady structures. Although...
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semarak ilmu
2023
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| Online Access: | http://eprints.uthm.edu.my/10207/1/J15701_233fd61a1f159d315bb259a85f031a09.pdf http://eprints.uthm.edu.my/10207/ https://doi.org/10.37934/cfdl.15.1.7687 |
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| author | Mohammad Arafat, Mohammad Arafat Izuan Amin Ishak, Izuan Amin Ishak Ahmad Faiz Mohammad, Ahmad Faiz Mohammad Amir Khalid, Amir Khalid Md. Norrizam Mohmad Jaát, Md. Norrizam Mohmad Jaát Mohd Fuad Yasak, Mohd Fuad Yasak |
| author_facet | Mohammad Arafat, Mohammad Arafat Izuan Amin Ishak, Izuan Amin Ishak Ahmad Faiz Mohammad, Ahmad Faiz Mohammad Amir Khalid, Amir Khalid Md. Norrizam Mohmad Jaát, Md. Norrizam Mohmad Jaát Mohd Fuad Yasak, Mohd Fuad Yasak |
| author_sort | Mohammad Arafat, Mohammad Arafat |
| building | UTHM Library |
| collection | Institutional Repository |
| content_provider | Universiti Tun Hussein Onn Malaysia |
| content_source | UTHM Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | Improvement to the next-generation high-speed train (NG-HST) is ongoing particularly in achieving a higher operating speed. Consequently, the aerodynamic effect of the
train will be more critical as it affects the development of a wake flow characterized by complex and unsteady structures. Although the effect of Reynolds number (Re) on aerodynamic forces is negligible, its effect on the wake of NG-HSTs is unknown. In this study, the Re ranging from 7.42 × 105 to 1.62 × 106 was used to examine the characteristics of vortex structures, streamline distributions, velocity characteristics,
and pressure characteristics in the wake region of an NG-HST. The Delayed Detached Eddy Simulation (DDES) is used as the turbulence model. In addition, the simulation results were compared with the previous wind tunnel experimental data. The results indicated no significant changes in the overall wake flow structure when Re was increased. According to power spectral density analysis, increasing the Reynolds
number increased the turbulence intensity of the wake which gradually dissipated as the distance from the train increased. The findings of the study could be used to better
understand the flow characteristics at the wake of NG-HSTs for future development. |
| format | Article |
| id | my.uthm.eprints-10207 |
| institution | Universiti Tun Hussein Onn Malaysia |
| language | en |
| publishDate | 2023 |
| publisher | semarak ilmu |
| record_format | eprints |
| spelling | my.uthm.eprints-102072023-10-18T07:17:03Z http://eprints.uthm.edu.my/10207/ Effect of Reynolds number on the wake of a Next-Generation High-Speed Train using CFD analysis Mohammad Arafat, Mohammad Arafat Izuan Amin Ishak, Izuan Amin Ishak Ahmad Faiz Mohammad, Ahmad Faiz Mohammad Amir Khalid, Amir Khalid Md. Norrizam Mohmad Jaát, Md. Norrizam Mohmad Jaát Mohd Fuad Yasak, Mohd Fuad Yasak T Technology (General) Improvement to the next-generation high-speed train (NG-HST) is ongoing particularly in achieving a higher operating speed. Consequently, the aerodynamic effect of the train will be more critical as it affects the development of a wake flow characterized by complex and unsteady structures. Although the effect of Reynolds number (Re) on aerodynamic forces is negligible, its effect on the wake of NG-HSTs is unknown. In this study, the Re ranging from 7.42 × 105 to 1.62 × 106 was used to examine the characteristics of vortex structures, streamline distributions, velocity characteristics, and pressure characteristics in the wake region of an NG-HST. The Delayed Detached Eddy Simulation (DDES) is used as the turbulence model. In addition, the simulation results were compared with the previous wind tunnel experimental data. The results indicated no significant changes in the overall wake flow structure when Re was increased. According to power spectral density analysis, increasing the Reynolds number increased the turbulence intensity of the wake which gradually dissipated as the distance from the train increased. The findings of the study could be used to better understand the flow characteristics at the wake of NG-HSTs for future development. semarak ilmu 2023 Article PeerReviewed text en http://eprints.uthm.edu.my/10207/1/J15701_233fd61a1f159d315bb259a85f031a09.pdf Mohammad Arafat, Mohammad Arafat and Izuan Amin Ishak, Izuan Amin Ishak and Ahmad Faiz Mohammad, Ahmad Faiz Mohammad and Amir Khalid, Amir Khalid and Md. Norrizam Mohmad Jaát, Md. Norrizam Mohmad Jaát and Mohd Fuad Yasak, Mohd Fuad Yasak (2023) Effect of Reynolds number on the wake of a Next-Generation High-Speed Train using CFD analysis. CFD Letters, 15 (1). pp. 76-87. ISSN 2180-1363 https://doi.org/10.37934/cfdl.15.1.7687 |
| spellingShingle | T Technology (General) Mohammad Arafat, Mohammad Arafat Izuan Amin Ishak, Izuan Amin Ishak Ahmad Faiz Mohammad, Ahmad Faiz Mohammad Amir Khalid, Amir Khalid Md. Norrizam Mohmad Jaát, Md. Norrizam Mohmad Jaát Mohd Fuad Yasak, Mohd Fuad Yasak Effect of Reynolds number on the wake of a Next-Generation High-Speed Train using CFD analysis |
| title | Effect of Reynolds number on the wake of a Next-Generation High-Speed Train using CFD analysis |
| title_full | Effect of Reynolds number on the wake of a Next-Generation High-Speed Train using CFD analysis |
| title_fullStr | Effect of Reynolds number on the wake of a Next-Generation High-Speed Train using CFD analysis |
| title_full_unstemmed | Effect of Reynolds number on the wake of a Next-Generation High-Speed Train using CFD analysis |
| title_short | Effect of Reynolds number on the wake of a Next-Generation High-Speed Train using CFD analysis |
| title_sort | effect of reynolds number on the wake of a next-generation high-speed train using cfd analysis |
| topic | T Technology (General) |
| url | http://eprints.uthm.edu.my/10207/1/J15701_233fd61a1f159d315bb259a85f031a09.pdf http://eprints.uthm.edu.my/10207/ https://doi.org/10.37934/cfdl.15.1.7687 |
| url_provider | http://eprints.uthm.edu.my/ |