2707 風洞の流力発生音の低減技術(J20-2 流体関連の騒音と振動(2) 空力音の解析と制御,ジョイントセッション,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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Recently, it becomes imperative to evaluate fluid-induced noise for automobiles in operation as well as aero-dynamics performance. As it is necessary wind tunnels should be quiet to measure fluid-induced noise, authors have developed how to decrease fluid-induced noise in wind tunnels with original techniques, an entrainment system, pile fabric materials, a large collector and a powerful blower. However collectors or blowers are preferred relatively small and compact because of operating efficiency of wind tunnels. In order to cope this problem, authors have been studying noise level of wind tunnels for automobiles depended on the size of collectors. This paper describes noise measuring technique with a model wind tunnel and noise reduction techniques of collectors.
社団法人日本機械学会の論文
2008-08-02