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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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Main Authors: Mohammad Arafat, Mohammad Arafat, Ishak, Izuan Amin, Mohammad, Ahmad Faiz, Khalid, Amir, Mohmad Jaát, Md. Norrizam, Yasak, Mohd. Fuad
Format: Article
Language:English
Published: Penerbit Akademia Baru 2023
Subjects:
T Technology (General)
Online Access:http://eprints.utm.my/105867/1/AhmadFaizMohammad2023_EffectofReynoldsnumberontheWakeofaNextGeneration.pdf
http://eprints.utm.my/105867/
http://dx.doi.org/10.37934/cfdl.15.1.7687
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spelling my.utm.1058672024-05-20T07:20:12Z http://eprints.utm.my/105867/ Effect of Reynolds number on the wake of a next-generation high-speed train using CFD analysis Mohammad Arafat, Mohammad Arafat Ishak, Izuan Amin Mohammad, Ahmad Faiz Khalid, Amir Mohmad Jaát, Md. Norrizam Yasak, Mohd. Fuad 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. Penerbit Akademia Baru 2023 Article PeerReviewed application/pdf en http://eprints.utm.my/105867/1/AhmadFaizMohammad2023_EffectofReynoldsnumberontheWakeofaNextGeneration.pdf Mohammad Arafat, Mohammad Arafat and Ishak, Izuan Amin and Mohammad, Ahmad Faiz and Khalid, Amir and Mohmad Jaát, Md. Norrizam and Yasak, Mohd. Fuad (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 http://dx.doi.org/10.37934/cfdl.15.1.7687 DOI : 10.37934/cfdl.15.1.7687
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic T Technology (General)
spellingShingle T Technology (General)
Mohammad Arafat, Mohammad Arafat
Ishak, Izuan Amin
Mohammad, Ahmad Faiz
Khalid, Amir
Mohmad Jaát, Md. Norrizam
Yasak, Mohd. Fuad
Effect of Reynolds number on the wake of a next-generation high-speed train using CFD analysis
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
author Mohammad Arafat, Mohammad Arafat
Ishak, Izuan Amin
Mohammad, Ahmad Faiz
Khalid, Amir
Mohmad Jaát, Md. Norrizam
Yasak, Mohd. Fuad
author_facet Mohammad Arafat, Mohammad Arafat
Ishak, Izuan Amin
Mohammad, Ahmad Faiz
Khalid, Amir
Mohmad Jaát, Md. Norrizam
Yasak, Mohd. Fuad
author_sort Mohammad Arafat, Mohammad Arafat
title 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_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_sort effect of reynolds number on the wake of a next-generation high-speed train using cfd analysis
publisher Penerbit Akademia Baru
publishDate 2023
url http://eprints.utm.my/105867/1/AhmadFaizMohammad2023_EffectofReynoldsnumberontheWakeofaNextGeneration.pdf
http://eprints.utm.my/105867/
http://dx.doi.org/10.37934/cfdl.15.1.7687
_version_ 1800082674600116224
score 13.211869

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