Quarterly Report of RTRI
Online ISSN : 1880-1765
Print ISSN : 0033-9008
ISSN-L : 0033-9008
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Study on the Aeroacoustic Noise from Shinkansen with Mirror Image Models
Takehisa TAKAISHIYasuo ZENDAYasuhiro SHIMIZU
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2001 Volume 42 Issue 2 Pages 110-114

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Abstract

The effect of aeroacoustic noise on the sound level of Shinkansen train on the ground becomes increasingly important as the maximum speed increases. In order to simulate the effect of the ground that moves relative to the vehicle, a pair of mirror image models are tested at the Maibara Wind Tunnel which has an excellent low background noise level. Sound levels generated by several combinations of front shapes, bogie conditions and inter-car gaps are measured by a sound concentrating microphone with a paraboloidal reflector. Measurements of flow properties show that the noise is mainly generated by the vortices that are separated at the leading edge of the bogie section, travel leeward at the convective flow speed, and then impinge upon the trailing edge of the section.

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© 2001 by Railway Technical Research Institute
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