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http://dx.doi.org/10.5407/jksv.2018.16.3.008

Study on Impulse Wave Radiated from High Speed Railway Tunnel Exit with Baffle Plate  

Kim, Tae Ho (School of Mechanical Engineering, Andong National Univ.)
Kim, Dong Hyeon (Korea Railroad Research Institute)
Kim, Heuy Dong (Department of Mechanical Engineering, Andong National Univ.)
Publication Information
Journal of the Korean Society of Visualization / v.16, no.3, 2018 , pp. 8-15 More about this Journal
Abstract
Recently, as the high speed railway becomes more common, new environmental problems such as noise around tunnels are appearing. When a high speed train enters a tunnel, a compression wave in the tunnel is generated and propagated toward the tunnel exit at a sonic speed. When it reaches the tunnel exit, a part of compression wave radiates as a pulse typed impulse wave to the outside of tunnel. The impulse wave has an explosive noise. When the impulse wave is propagated around a village, it induces a serious noise or other problems to the resident. In order to solve these engineering problems, it is important to investigate the radiation characteristics of the impulse wave radiated from the tunnel exit. In this study, the effect of the length and angle of the baffle plate at the tunnel exit on the impulse wave radiated from the tunnel exit was investigated by numerical analysis. As a results, the baffle plate greatly affected the propagation of impulse wave.
Keywords
High Speed Train; Compression Wave; Impulse Wave; Pressure Gradient;
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