2705 騒音を考慮したシロッコファンの性能評価(J20-1 流体関連の騒音と振動(1) ファン騒音,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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The squirrel cage fan is used in many facilities for high pressure and large of flow rates, and is desired to improve the fan efficiency. In this paper, this type of fan with the large span was researched. The fluid and sound characteristics are experimentally analyzed at out of the impeller and in the scroll casing. It is cleared that the flow is fairly biased to the center and it is emerged the large circulation region over the half of span. The kinematic energy, at each scroll section, is not accumulated at the beginning of the scroll, but near the end of its. The sound energy from the fan is extremely turned out at the end of the scroll.
2008-08-02