Flow Field around the Blade of a Small Sirocco Fan with a Small Number of Blades

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  • 少ない羽根枚数を有する小型シロッコファンの翼周りの流れ場
  • スクナイ ハネ マイスウ オ ユウスル コガタ シロッコファン ノ ヨク マワリ ノ ナガレバ

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Abstract

Recently, fans have been used in order to cool the interior of electronics. A sirocco fan has been used in a narrow place especially because it has the characteristics of high pressure and high flow rate. But the noise of the sirocco fan becomes loud easily so it's very important to reduce the noise of the sirocco fan. So far, there were a lot of attempts to reduce the noise of the fan by performing experiments and numerical analysis. However, there is little knowledge regarding the sirocco fan with a small number of blades. There is an advantage that can reduce the production cost of the sirocco fan if it has a small number of blades. The purpose of this study is to clarify the flow field around the blade of a small sirocco fan with a small number of blades, using LES. As a result, it was suggested that the fast reverse flow appeared between blades at θ=330deg in high flow rate points (Q=0.0321 m3/s, 0.0178 m3/s). Because of the changing flow field, pressure fluctuation around the blades and between the blades became higher easily. Moreover, it was acquired that the pressure fluctuation decreased by the flow reduction.

Journal

  • Turbomachinery

    Turbomachinery 43 (3), 160-169, 2015

    Turbomachinery Society of Japan

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