A review of research into aerodynamic concepts for high speed trains in tunnels and open air and the air-tightness requirements for passenger comfort

Abstract

India will soon have its first line with trains operating at internationally defined standards of high speed (exceeding 250 km/h). On the MAHSR (Mumbai-Ahmedabad High Speed Railway) corridor modern high speed trains will routinely operate at speeds as high as 200 mph (320 km/h). At high speed, trains are capable of generating significant aerodynamic effects including wind gusts and air pressure changes, which makes it necessary to address HSTs’ aerodynamics during the planning stage of high-speed rail (HSR) lines. The dynamic pressure tightness in train cars is also an important factor in the design of future railway tunnels, together with the medical health criterion and pressure comfort criteria. With increasing speed, the requirements of pressure tightness increases, which are explained and illustrated in this study. The current study is based on prior work done in the field of aerodynamic effects of HSTs, international standards, and design practice followed in existing HSR projects. Effort has been made to bring various studies in one place for ready reference. Parameters such as pressure comfort, optimized distance between center of track, wayside structural design, and tunnel cross-section requirements are explained. Based on the study and established relation by different authors, the pressure difference calculation is done for the MAHSR project for different scenarios, and passenger comfort was deduced. In this study, three major aspects of the aerodynamic pressure effect on the rolling stock and surroundings are examined, and each aspect is discussed distinctly: (1) open-air considerations: pressure effect on wayside structures, (2) open-air considerations: two trains crossing in the open field, and (3) open-air considerations: tunnel phenomenon: pressure wave effects on trains inside tunnels. The present study and a substantial portion of the existing knowledge base can be extrapolated for use in the future guidelines in India. This study examine the resultant pressures on wayside structures, the resultant pressures on adjacent trains, and pressure wave effects in tunnels (associated analyses were performed to determine the appropriate cross-sectional area of the tunnels), respectively. It includes basic aerodynamic concepts, influencing factors, measurement and calculation of pressure between trains, known and potential impacts, mitigations, standards, conclusions, and recommendations.

Keywords

Aerodynamics air tightness high-speed trains internal pressurization pressure variations passenger comfort tunnel wayside structure

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References

Commission Regulation (EU) No 1302/2014 of 18 November 2014 concerning a technical specification for interoperability relating to the ‘rolling stock — locomotives and passenger rolling stock’ subsystem of the rail system in the European Union.

High-Speed Rail Aerodynamic Assessment and Mitigation Report by Federal Railroad Administration, USA.

Gilbert

Baker

Quinn

. Aerodynamic pressures around high-speed trains: the transition from unconfined to enclosed spaces. Proc Inst Mech Eng F: J Rail Rapid Transit 2013; 227: 609–622.

EN 14067-4: railway applications - Aerodynamics - Requirements and test procedures for aerodynamics on open track

UIC leaflet 779-11 , 2nd edition: Determination of railway tunnel cross-sectional areas on the basis of aerodynamic considerations, UIC, 2005.

Baker

Quinn

Sima

, et al. Full scale measurement and analysis of train slipstreams and wakes: part 2 gust analysis. Proc Inst Mech Eng F: J Rail Rapid Transit 2013.

Baron

Mossi

Sibilla

. The alleviation of the aerodynamic drag and wave effects of high-speed trains in very long tunnels. Wind Eng Ind Aerodyn 2001; 89(5): 365–401.

Pope

. Effective management of risk from slipstream effects at trackside and platforms (RSSB Report), 2008.

Lee

. Assessment of potential aerodynamic effects on personnel and equipment in proximity to high-speed train operations. US Department of Transportation DOT/FRA/ORD-99/11, 1999.

10.

Takei

Izumi

Yamada

, et al. Evaluation method for air pressure variation and station facility member deterioration caused by high-speed train passage in stations. Q Rep RTRI 2008; 49: 89–95.

11.

Gawthorpe

. Aerodynamic problems of high speed trains running on conventional tracks. High Speed Ground Vehicles 1972; 1: 55.

12.

Kikuchi

Tanaka

Iida

, et al. Countermeasures for reducing pressure variation due to train passage in open sections. Q Rep RTRI 2001; 42: 77–82.

13.

Johnson

. Basis of the 1.44kPa criterion for the train passing pressure pulse. RSSB position paper, 2011.

14.

Fujii

Ogawa

. Aerodynamics of high speed trains passing by each other. Comput Fluids 1995; 24: 897242–908.

15.

Liu

, et al. Air pressure pulse developing regularity of high-speed trains crossing in open air. J Mech Eng 2011; 47: 125–130.

16.

Gaillard

. Aerodynamics of trains in tunnels. In: International symposium of aerodynamics and tunnel ventilation of vehicle tunnels Canterbury, UK: April 1973. Paper J4, 33–47.

17.

Schetz

. Aerodynamics of high-speed trains. Annu Rev Fluid Mech 2001; 33: 371–414.

18.

Raghunathan

Kim

H-D

Setoguchi

. Aerodynamics of high-speed railway train. Prog Aerospace Sciences 2002; 38: 469–514.

19.

Johnson

Dalley

. 1/25 scale moving model tests for the TRANSAERO project. In: TRANSAERO - A European Initiative on Transient Aerodynamics for Railway System Optimisation. Springer, 2002, p. 123.

20.

Berenger

Kessler

Gregoire

. Part 1: panel method applied to the prediction of unsteady effects caused by high speed trains passing, in the open air and in tunnels. In: TRANSAERO - A European initiative on transient aerodynamics for railway system optimisation. Springer; 2002, p. 136.

21.

Tian

H-q

Liang

X-f

, et al. Correlation between pressure wave of train passing and running speed. China Railway Sci 2006; 27: 64–67.

22.

Mancini

Malfatti

. Full scale measurements on high speed train ETR 500 passing in open air and in tunnels of Italian high speed line. TRANSAERO A Eur Initiat Transient Aerodynamics Railway Syst Optimisation. Springer; 2002; 101.

23.

Gregoire

. Transaero work package 3: trains passing effects - summary and conclusions. Notes Numer Fluid Mech Multidisciplinary Des (NNFM) 2002; 79: 170–184.

24.

Gawthorpe

. Aerodynamics of trains in the open air. Railway Engineer Int 1978; 3: Canterbury, UK: April 1973. Paper J4, 33–47

25.

MacNeill

Holmes

Lee

. Measurement of the aerodynamic pressures produced by passing trains. In: 2002 ASME/IEEE Joint Railroad Conference, Washington DC, USA, 2002, pp. 57–64.

26.

Holmes

Schroeder

. Aerodynamic effects of high-speed passenger trains on other trains. DOT/FRA/ORD-01/12 2002; 3.

27.

Holmes

Schroeder

Toma

. High-speed passenger and intercity train aerodynamic computer modeling. In Proceedings of ME2000, Orlando, Florida, 2000.

28.

Liu

. The influence factors and developing regularity of air pressure pulse as trains passing through each other. In: ICTE 2011, Chengdu, China, 23-25 July 2011, pp. 23–25.

29.

Zhao

Zhang

, et al. Aerodynamic performances and vehicle dynamic response of high-speed trains passing each other. J Mod Transportation 2012; 20: 36–43.

30.

G-d

. The aerodynamics points of high speed trains. Rolling Stock 2006; 10.

31.

Zhao

Liu

. Influence of air pressure pulse on side windows of high-speed trains passing each other. J Mech Eng 2010; 4: 016.

32.

Agrawal

Goel

Gupta

. Design parameters of high speed corridor. Indian Railways Institute of Civil Engineering, 2007.

33.

Ministerial ordinance to provide the technical standard on railway. ed: Ministry of Land, Infrastructure, Transport, and Tourism of Japan, 2006.

34.

Niu

Sui

, et al. Aerodynamics of railway train/tunnel system: a review of recent research. Energy Built Environ 2020; 1: 351–375.

35.

Komatsu

Yamada

The reduction of train draft presure in passing by each other. In: Proceedings of WCRR, Tokyo, 1999. pp. 315–319.

36.

Verwaltungsvorschrift zur Prüfung von Notein- und Notausstiegfenstern (NEA) in Schienenfahrzeugen (6.2 VwV NEA). ed, 2007.

37.

Banko

Hue

. Pioneering the Application of High Speed Rail Express Trainsets in the United States. 2010 William Barclay parsons fellowship. Monograph 26, Dec: 2012.

38.

Yang

M-z

Yuan

X-x

Xiong

X-h

, et al. Experiment study of pressure pulse caused by trains passing each other on Guangzhou-Shenzhen railway for the sixth speed-up. J Experiments Fluid Mech 2008; 2: 010.

39.

EN14067-5: Railway applications- Aerodynamics Requirements and test procedures for aerodynamics in tunnels

40.

Zhang

Zheng

, et al. Analysis of the aerodynamic pressure effect on the fatigue strength of the carbody of high-speed trains passing by each other in a tunnel. Proc Inst Mech Eng Part F: J Rail Rapid Transit 2018; 233: 783–801. DOI: 10.1177/0954409718809469.

41.

Dynamic Pressure Tightness of Very High Speed Train ETR1000/V300ZEFIRO paper by Bombardier Transportation

42.

Rocchi

Schito

Somaschini

, et al. 2016. Measurement of the aerodynamic features of the ETR1000-V300Zefiro high-speed train. In Proc. Of the 11th World Congress on Railway Research, Milano, Italy, 2016.

43.

Berlitz

. Pressure comfort - meeting future demands of high speed trains. In: Proceedings of the World Congress of Railway Research, Edinburgh, 2003.

44.

Ozawa

Maeda

Matsumura

, et al. Countermeasures to reduce micropressure waves radiating from exits of Shinkansen tunnels. In: Proceedings of the 7th International Symposium on Aerodynamics and Ventilation of Tunnels, Elsevier science publishers, 1991. pp. 253–266.

45.

Gregoire

Rety

Masbernat

, et al. Experimental study (scale 1/70th) and numerical simulations of the generation of pressure waves and micro-pressure waves due to highspeed and train-tunnel entry. In: Proceedings of the 9th Symposium on Vehicle Tunnels, UK: bHR group publication, 1997, pp. 319–329.

46.

Vardy

. Generation and alleviation of sonic booms from rail tunnels. Proc Inst Civil Eng - Eng Comput Mech 2008; 161: 107–119.

47.

California High-Speed Train project_ Basic High Speed Train Tunnel ConFigureuration TM 2.4.2

48.

Kobayashi

Suzuki

Akutsu

, et al. New ventilating system of Shinkhansen cars for alleviating aural discomfort of passengers. In Proceedings of the 7th International Symposium on the Aerodynamics and Ventilation of Vehicle Tunnels, UK: bHR group publication, 1991, pp. 155–172.

49.

A discussion on technologies for improving the operational speed of high speed railway networks by Chun-fang Lu

50.

“Pioneering the Application of High Speed Rail Express Trainsets in the United States” Parsons Brinckerhoff 2010 William Barclay Parsons Fellowship Monograph 26.

51.

Subway Environmental Design Handbook. Volume I. Principles and Applications. Second Edition, Washington, DC: Transit Development Corporation, Inc. for US DOT Urban Mass Transit Administration, 1976.

52.

Carstens

Kresge

. Literature survey of passenger comfort limitations of high-speed ground transports. Rep. D-910353-1, Res. Lab., United Aircraft corp., July 26, 1965.

53.

Lastra de la Rubia E. Influence of aerodynamics in tunnels design. 360. Revista de alta velocidad, numero 5 - junio-2018, pp. 333–353.