WFRF:(Zeng Zhi)
Sökning: WFRF:(Zeng Zhi) > (2020-2024) > Reducing the aerody...
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03621naa a2200433 4500 | |
| 001 | oai:research.chalmers.se:16391637-ec4a-4138-81d1-17f0cef56fc3 | |
| 003 | SwePub | |
| 008 | 230423s2023 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://doi.org/10.1016/j.jweia.2023.1054292 DOI |
| 024 | 7 | a https://research.chalmers.se/publication/5355092 URI |
| 040 | a (SwePub)cth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Chen, Zheng weiu Hong Kong Polytechnic University4 aut |
| 245 | 1 0 | a Reducing the aerodynamic drag of high-speed trains by air blowing from the nose part: Effect of blowing speed |
| 264 | 1 | c 2023 |
| 338 | a electronic2 rdacarrier | |
| 520 | a To reduce the aerodynamic drag of high-speed trains, this work proposes an air blowing configuration on the head and tail cars of high-speed trains. The variation in the aerodynamic drag and slipstream velocity is analyzed under different blowing velocities, and the flow mechanism for train aerodynamic performance alteration is explained. The results show that under the blowing speeds of Ub = 0.05Ut, 0.10Ut, 0.15Ut, and 0.20Ut, where Ut is the train speed, the total drag coefficient (Cd) decreases by 5.81%, 10.78%, 13.70%, and 15.43% compared to the without-blowing case, respectively. However, with the increase in the blowing speed, the reduction trend of Cd tends to be smoother; namely, the decrement ratio compared to the previous blowing speed for the head car is 9.08%, 0.11%, 0.60%, and 1.14% for Ub = 0.05Ut, 0.10Ut, 0.15Ut, and 0.20Ut, respectively. The blowing measure generates an air gap between the coming flow and train surface, consequently causing a reduction in the viscous and pressure drag. In addition, the structure size and strength of the wake flow under different blowing cases show a decreasing trend from Ub = 0.00Ut to 0.10Ut and then an increasing trend from Ub = 0.10Ut to 0.20Ut. Thus, considering the blowing cost, efficiency, and flow structure evolution comprehensively, the case of Ub = 0.10Ut is recommended. Under this blowing speed, the reduction ratio of the aerodynamic drag is 9.18%, 12.77%, 10.90%, and 10.78% for the head, middle, tail car, and total train, respectively. | |
| 650 | 7 | a TEKNIK OCH TEKNOLOGIERx Samhällsbyggnadsteknik0 (SwePub)2012 hsv//swe |
| 650 | 7 | a ENGINEERING AND TECHNOLOGYx Civil Engineering0 (SwePub)2012 hsv//eng |
| 650 | 7 | a TEKNIK OCH TEKNOLOGIERx Maskinteknikx Strömningsmekanik och akustik0 (SwePub)203062 hsv//swe |
| 650 | 7 | a ENGINEERING AND TECHNOLOGYx Mechanical Engineeringx Fluid Mechanics and Acoustics0 (SwePub)203062 hsv//eng |
| 653 | a Blowing speed | |
| 653 | a High-speed train | |
| 653 | a Flow structure | |
| 653 | a Aerodynamic drag | |
| 653 | a Air blowing | |
| 700 | 1 | a Zeng, Guang-Zhiu Hong Kong Polytechnic University4 aut |
| 700 | 1 | a Ni, Yi-Qingu Hong Kong Polytechnic University4 aut |
| 700 | 1 | a Liu, Tang-Hongu Central South University4 aut |
| 700 | 1 | a Niu, Jiqiangu Southwest Jiaotong University4 aut |
| 700 | 1 | a Yao, Huadong,d 1982u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)huadong |
| 710 | 2 | a Hong Kong Polytechnic Universityb Central South University4 org |
| 773 | 0 | t Journal of Wind Engineering and Industrial Aerodynamicsg 238q 238x 0167-6105 |
| 856 | 4 | u https://research.chalmers.se/publication/535587/file/535587_Fulltext.pdfx primaryx freey FULLTEXT |
| 856 | 4 8 | u https://doi.org/10.1016/j.jweia.2023.105429 |
| 856 | 4 8 | u https://research.chalmers.se/publication/535509 |
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