TY - GEN
T1 - Characteristics of nonlinear effects on the propagating compression wave in a tunnel
AU - Orita, Tomo
AU - Aoki, Toshiyuki
AU - Ishii, Shinsuke
AU - Sasa, Daisuke
PY - 2011
Y1 - 2011
N2 - A compression wave is generated ahead of a high-speed train, while entering a tunnel. This compression wave propagates to the tunnel exit and spouts out as a micro pressure wave, causing an exploding sound. In order to estimate the magnitude correctly, the mechanism of the attenuation and distortion of a compression wave propagating along a tunnel must be understood and experimental information on these phenomena is required. An experimental and numerical investigation is carried out to clarify the nonlinear effect of the propagating compression wave in a tube. The attenuation and distortion of compression wavefront are affected by nonlinear effects on the propagating compression wave in a tunnel. It is confirmed that a head of wavefront and an overshoot on pressure distribution is observed behind a compression wave due to the transition of the unsteady boundary layer.
AB - A compression wave is generated ahead of a high-speed train, while entering a tunnel. This compression wave propagates to the tunnel exit and spouts out as a micro pressure wave, causing an exploding sound. In order to estimate the magnitude correctly, the mechanism of the attenuation and distortion of a compression wave propagating along a tunnel must be understood and experimental information on these phenomena is required. An experimental and numerical investigation is carried out to clarify the nonlinear effect of the propagating compression wave in a tube. The attenuation and distortion of compression wavefront are affected by nonlinear effects on the propagating compression wave in a tunnel. It is confirmed that a head of wavefront and an overshoot on pressure distribution is observed behind a compression wave due to the transition of the unsteady boundary layer.
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M3 - Conference contribution
AN - SCOPUS:84867925574
SN - 9781618392800
T3 - 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
SP - 1016
EP - 1021
BT - 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
T2 - 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Y2 - 4 September 2011 through 7 September 2011
ER -