Shape Optimum Design of Propeller Blade Operating in Low Reynolds Number Range.

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  • Kogiso Nozomu
    大阪府立大学大学院工学研究科機械系専攻航空宇宙工学分野
  • Utsumi Tomoyoshi
    大阪府立大学大学院工学研究科機械系専攻航空宇宙工学分野 現（株）ヤマハ発動機
  • Murotsu Yoshisada
    大阪府立工業高等専門学校

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Other Title
  • 低レイノルズ数域で作動するプロペラブレードの形状最適化
  • テイレイノルズスウイキ デ サドウ スル プロペラブレード ノ ケイジョウ サイテキカ

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Description

This study is concerned with a shape optimum design of a propeller blade operating in a low Reynolds number range, 1.0–2.0×105. The objective is to minimize the power-required under the constraints on the thrust and the angle of attack in terms of chord length and twist angle distributions where the power-required is evaluated by 3-D panel method. The profile drag is also considered in the optimization, because the effect cannot be ignored in a low Reynolds number range. For calculation efficiency, the profile drag coefficient is approximated by higher order polynomials in terms of Reynolds number and angle of attack. The effectiveness of the proposed method is demonstrated by the design of a propeller blade of a human-powered aircraft. Additionally, effect of the profile drag is discussed by comparing the designs with and without considering the profile drag.

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