高速新幹線車両の空力・音響問題に対する数値解析技術の応用

概要

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A new numerical technique for incompressible flow analyses around high -speed Shinkansen cars entering a tunnel or passing each other and numerical prediction of aerodynamic sound radiated from a circular cylinder are presented. A combined method of the finite element method and the finite difference method is developed for moving boundary problems based on the ABMAC method using a sophisticated time integration scheme and is applied to the aerodynamic analysis around high-speed trains. For aeroacoustic analysis, the large eddy simulation technique is used for the three -dimensional unsteady flow analysis. The far-field sound pressure is then calculated from the fluctuating surface pressure on the cylinder, based on Curie's equation. Computed results for both problems are in good agreements with the experimental results.
日本応用数理学会の論文
1996-03-15