Experimental measurements of rolling stock aerodynamics
https://doi.org/10.52170/1815-9265_2022_62_40
Abstract
The increase in the speed of trains on railways is accompanied by a significant increase in the aerodynamic impact on structures located in close proximity to the axis of the track. This factor is of particular importance in the development of high-speed rail lines (HSR). It is advisable to determine the loads on structures during the design and construction of the HSR by numerical modeling in specialized software complexes with mandatory verification of the developed calculation models.
This article presents the results of experimental measurements of the external aerodynamics of rolling stock running on the St. Petersburg – Moscow line of the Oktyabrskaya Railway. Measurements of changes in the air pressure at a point during the passage of trains were measured by high-frequency membrane pressure sensors. The set speed of trains at the measuring points was up to 140 km/h for ordinary passenger trains and up to 250 km/h for the Sapsan high-speed electric train. The analysis of the obtained results made it possible to obtain a picture of the distribution of extreme values of excess and rarefied air pressure depending on the distance from the track axis and the height above the level of the rail head for various types of rolling stock. Based on the obtained distribution pattern, the degree of decrease in the intensity of the air wave from the passing train is determined depending on the distance from the axis of the track. The periodic nature of the aerodynamic impact caused by the presence of gaps between cars was also revealed, and its frequencies for different speeds of movement were determined.
The results presented in this paper can subsequently be used to verify the developed computational models of the aerodynamic impact of moving high-speed trains on infrastructure elements.
About the Authors
N. A. Labutin
Emperor Alexander I St. Petersburg State Transport University
Russian Federation
Russian Federation
Nikita A. Labutin – Post-graduate Student of the Bridge Department
St. Petersburg
L. K. Dyachenko
Emperor Alexander I St. Petersburg State Transport University
Russian Federation
Russian Federation
Leonid K. Dyachenko – Associate Professor of the Bridge Department, Candidate of Engineering
St. Petersburg
A. V. Lang
Emperor Alexander I St. Petersburg State Transport University
Russian Federation
Russian Federation
Andrey V. Lang – Post-graduate Student of the Bridge Department
St. Petersburg
References
1. Churkov N. A., Bityutsky A. A., Kruchek V. A. The influence of the air environment on the train. Problems of transport systems. 2013;2:20–26. (In Russ.).
2. Polyakov B. O., Vaulina E. Ya. Interaction of a high-speed train with the air environment near infrastructure facilities. Transport of the Russian Federation. 2017;3(70):25–28. (In Russ.).
3. Churkov N. A. Railway train aerodynamics: principles of rolling stock design that minimize the effects of the air sphere on a railway train. М.: Zheldorizdat; 2007. 332 p. (In Russ.).
4. Baker C. J. A review of train aerodynamics. Part 1. Fundamentals. The Aeronautical Journal. 2014;117(1201):201–228.
5. Baker C. J. A review of train aerodynamics. Part 2. Application. The Aeronautical Journal. 2014;118(1202):345–382.
6. Baker C. J., Soper D. A full-scale experimental investigation of passenger and freight train aerodynamics. Proceedings of the Institution of Mechanical Engineers, Part F. Journal of Rail and Rapid Transit. 2019;234(5):1–41.
7. Xiong Xiao-Hui, Yang Bo, Wang Kai-Wen, Liu Tang-hong, He Zhao, Zhu Liang. Full-scale experiment of transient aerodynamic pressures acting on a bridge noise barrier induced by the passage of high-speed trains operating at 380–420 km/h. Journal of Wind Engineering & Industrial Aerodynamics. 2020;204:1–9.
8. Yue Zhang, Dongping Wang. Numerical analysis of the aerodynamic characteristics of the open Line intersection of fast freight train with the speed of 160 km/h. Journal of Physics: Conference Series. 2021;2125:1–10.
9. Jian Du, Lei Zhang, Ming-zhi Yang, Fan Wu, Kun Li. Moving model experiments on transient pressure induced by a high-speed train passing through noise barrier. Journal of Wind Engineering & Industrial Aerodynamics. 2020;204.
10. Soper D., Gillmeier S., Baker C., Morgan T., Vojnovic L. Aerodynamic forces on railway acoustic barriers. Journal of Wind Engineering & Industrial Aerodynamics. 2019;191:266–278.
11. Lazarenko Yu. M., Kapuskin A. N. Aerodynamic effect of the high-speed electric train Sapsan on passengers on platforms and on oncoming trains when crossing. Bulletin VNIIZHT. 2012;4:11–14. (In Russ.).
12. Gorelik A. V., Shuvaev V. V., Minakov D. E. The aerodynamic effect of train speed on the floor devices of the SCB. Science and Technology of Transport. 2013;(2):067–074. (In Russ.).
Review
For citations:
Labutin N.A., Dyachenko L.K., Lang A.V. Experimental measurements of rolling stock aerodynamics. Bulletin of Siberian State University of Transport. 2022;(3):40-48. (In Russ.) https://doi.org/10.52170/1815-9265_2022_62_40
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