2706 切妻型車両のトンネル突入時に発生する圧縮波の低減(空力・騒音,SS1:高度化,高速化,第18回交通・物流部門大会(TRANSLOG2009))

概要

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Wind tunnel experiments, field measurement, and model shooting experiments have been conducted to study the compression waves generated by bluff-nose trains and devise measures for reducing the waves and aerodynamic drag by preventing the flow separation. Effects of rounded corners of a front end of a bluff-nose train and aerodynamic attachments, as well as those of sidewalls and a hood installed at a tunnel entrance, have been investigated. It is demonstrated that an attachment of fins to the front face of a two-car test train traveling at 120 km/h can reduce the maximum values of pressure gradients of the compression waves by approximately 40 percent, and a 8-meter tunnel entrance hood can reduce those by approximately 70 percent.
一般社団法人日本機械学会の論文
2009-12-02