102 一様流れ中のテーパ円柱から発生する騒音の発生機構に関する研究(新しい騒音・振動改善技術(1),騒音・振動評価・改善技術)

概要

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The flow characteristics of the tapered cylinder were investigated in relating to the aeolian tone generation. The tapered cylinder was inclined toward to the flow directions. The experimental and numerical methods were examined to clear the mechanism of the aeolian tone generation. The aeolian tone from the tapered cylinder is large not at the zero inclined angle, but at negative or positive inclined angle. The wake vortex shedding is occurred even at the large inclined conditions. The aeolian tone is governed with not only the strength of the wake shedding vortex, but also the location of the rolling up of the wake vortex. The large span-wise flow in the dead air region makes small the dead air region and rolling up of wake vortex near the cylinder at large inclined angles.
社団法人日本機械学会の論文
2007-07-18