Influence of the Cross Section of Hood on the Compression Wave Generated by a High-Speed Train

Abstract:

An analysis is made of the compression wave generated when a high-speed train enters a tunnel with hood. The purpose of the hood is to reduce as much as practicable the maximum gradient of the compression wave. In this paper the numerical computation simulates the pressure change in the tunnel,analysises regularity of the the initial compression wave and the pressure gradient wave,compares the mitigation effect of the two hoods which have different cross section on the pressure gradient.The following conclusions have been drawn from the research: The amplitude of the first compression wave is not significantly reduced with hood,however,the amplitude of the pressure gradient is significantly reduced with hood.And the mitigation effect of the enlarged-transect hood is better than the equal-transect one.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 1365-1368
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.1365
• Online since: December 2012
• Authors: Ya Guang Yan
• Keywords: Compression Wave, Cross Section, Hood, Numerical Computation

References

[1] Woods W A,Pope C W.A:Journal of Wind Engineering and Industrial Aerodynamics, 1981(7),p.331.

[2] Yaguang Yan, Qingshan Yang,Jian Zhang:International Conference on Civil Engineering and Transportation 2011,2011,p.1143

[3] Vardy A E,Dayman B:Proc 3rd International Symposium on the Aerodynamics and Ventilation of Vehicle Tunnels. University of sheffield,UK,1979,Paper H3.