Research on the In fluence of Aerodynamic Performance of High-speed Train Air Brake Blades
When the emergency braking of high-speed trains is greater than 300 km/h, wind resistance braking is an effective auxiliary braking measure. In this paper, based on the N-S and <italic>k</italic>-<italic>ε</italic> double equation model of the three-dimensional steady incompr...
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Editorial Department of Electric Drive for Locomotives
2021-11-01
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| Series: | 机车电传动 |
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| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128x.2021.06.004 |
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| author | Wei WANG Hongtai XIE Yunfei WANG Wei CHAI Jingwu MA Zhenfeng WU |
| author_facet | Wei WANG Hongtai XIE Yunfei WANG Wei CHAI Jingwu MA Zhenfeng WU |
| author_sort | Wei WANG |
| collection | DOAJ |
| description | When the emergency braking of high-speed trains is greater than 300 km/h, wind resistance braking is an effective auxiliary braking measure. In this paper, based on the N-S and <italic>k</italic>-<italic>ε</italic> double equation model of the three-dimensional steady incompressible viscous flow field, a preliminary analysis of the aerodynamic performance of the high-speed train with brake wing panels was carried out with the computational fluid dynamics method. Directional force, vertical lift, lateral force, gas flow field aerodynamic interference effect and aerodynamic noise were calculated and explained in detail on the selection of different longitudinal positions, different upwind angles and different sets of longitudinal arrangement of the first row of wind wing panels. Preliminary research shows that: ① When a single-row brake wing panel is installed on the roof of a 350 km/h high-speed train headway for emergency braking, the air brake resistance of the train will increase by approximately 45% compared with that without the wing panel, and the vertical lift will increase by approximately 70%; ② When using wind resistance braking, the maximum pressure and average pressure on the windward surface of the brake wing plate increase in the form of parabola from the far ambient pressure value with the increase of speed, and the minimum pressure decreases in the form of inverted parabola from the far ambient pressure value; ③ The installation position of the first row of wind wing panels is within 2 m of the streamlined tail joint at the front of the driver's cab, the air resistance of the train decreases as the distance increases, and the vertical lift is basically unchanged. The range of positive and negative pressure zones formed before and after the wind wing panels gradually becomes smaller and weaker;④ When the windward angle of the first row brake wing plate is gradually expanded within 45 ° ~ 90 °, the air resistance of the train remains basically unchanged, the vertical lift increases first and then decreases slowly, and the aerodynamic interference effect and the high-pressure area on the windward surface of the wing plate are gradually weakened; ⑤ When multiple sets of brake wing panels are arranged on the roof of the head train at maximum equal intervals, as the number of wing panel arrangements increases, the air resistance experienced by the train increases slowly, and the vertical lift received remains basically unchanged. The aerodynamic interference effect between the wind wing plates gradually increased. The pressure on the windward side of the wind wing plates show that the first group is much larger than the subsequent groups, and the pressure peaks of the subsequent groups remain basically the same, with slight fluctuations. |
| format | Article |
| id | doaj-art-8db7e82664294ec3ad9a37c8c3cd3724 |
| institution | Kabale University |
| issn | 1000-128X |
| language | zho |
| publishDate | 2021-11-01 |
| publisher | Editorial Department of Electric Drive for Locomotives |
| record_format | Article |
| series | 机车电传动 |
| spelling | doaj-art-8db7e82664294ec3ad9a37c8c3cd37242025-08-20T03:49:03ZzhoEditorial Department of Electric Drive for Locomotives机车电传动1000-128X2021-11-010254122773082Research on the In fluence of Aerodynamic Performance of High-speed Train Air Brake BladesWei WANGHongtai XIEYunfei WANGWei CHAIJingwu MAZhenfeng WUWhen the emergency braking of high-speed trains is greater than 300 km/h, wind resistance braking is an effective auxiliary braking measure. In this paper, based on the N-S and <italic>k</italic>-<italic>ε</italic> double equation model of the three-dimensional steady incompressible viscous flow field, a preliminary analysis of the aerodynamic performance of the high-speed train with brake wing panels was carried out with the computational fluid dynamics method. Directional force, vertical lift, lateral force, gas flow field aerodynamic interference effect and aerodynamic noise were calculated and explained in detail on the selection of different longitudinal positions, different upwind angles and different sets of longitudinal arrangement of the first row of wind wing panels. Preliminary research shows that: ① When a single-row brake wing panel is installed on the roof of a 350 km/h high-speed train headway for emergency braking, the air brake resistance of the train will increase by approximately 45% compared with that without the wing panel, and the vertical lift will increase by approximately 70%; ② When using wind resistance braking, the maximum pressure and average pressure on the windward surface of the brake wing plate increase in the form of parabola from the far ambient pressure value with the increase of speed, and the minimum pressure decreases in the form of inverted parabola from the far ambient pressure value; ③ The installation position of the first row of wind wing panels is within 2 m of the streamlined tail joint at the front of the driver's cab, the air resistance of the train decreases as the distance increases, and the vertical lift is basically unchanged. The range of positive and negative pressure zones formed before and after the wind wing panels gradually becomes smaller and weaker;④ When the windward angle of the first row brake wing plate is gradually expanded within 45 ° ~ 90 °, the air resistance of the train remains basically unchanged, the vertical lift increases first and then decreases slowly, and the aerodynamic interference effect and the high-pressure area on the windward surface of the wing plate are gradually weakened; ⑤ When multiple sets of brake wing panels are arranged on the roof of the head train at maximum equal intervals, as the number of wing panel arrangements increases, the air resistance experienced by the train increases slowly, and the vertical lift received remains basically unchanged. The aerodynamic interference effect between the wind wing plates gradually increased. The pressure on the windward side of the wind wing plates show that the first group is much larger than the subsequent groups, and the pressure peaks of the subsequent groups remain basically the same, with slight fluctuations.http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128x.2021.06.004high-speed trainsaerodynamicsaerodynamic characteristicsaerodynamic noisebrake wing panelair resistancenumerical modelingsimulation |
| spellingShingle | Wei WANG Hongtai XIE Yunfei WANG Wei CHAI Jingwu MA Zhenfeng WU Research on the In fluence of Aerodynamic Performance of High-speed Train Air Brake Blades 机车电传动 high-speed trains aerodynamics aerodynamic characteristics aerodynamic noise brake wing panel air resistance numerical modeling simulation |
| title | Research on the In fluence of Aerodynamic Performance of High-speed Train Air Brake Blades |
| title_full | Research on the In fluence of Aerodynamic Performance of High-speed Train Air Brake Blades |
| title_fullStr | Research on the In fluence of Aerodynamic Performance of High-speed Train Air Brake Blades |
| title_full_unstemmed | Research on the In fluence of Aerodynamic Performance of High-speed Train Air Brake Blades |
| title_short | Research on the In fluence of Aerodynamic Performance of High-speed Train Air Brake Blades |
| title_sort | research on the in fluence of aerodynamic performance of high speed train air brake blades |
| topic | high-speed trains aerodynamics aerodynamic characteristics aerodynamic noise brake wing panel air resistance numerical modeling simulation |
| url | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128x.2021.06.004 |
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