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        <identifier>oai:jaxa.repo.nii.ac.jp:00036908</identifier>
        <datestamp>2023-06-20T21:29:15Z</datestamp>
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          <dc:title>Numerical simulation of dynamic stall phenomena for an airfoil oscillating in coupled pitching and heaving</dc:title>
          <dc:title>連成モードで振動する翼のダイナミック・ストール</dc:title>
          <dc:creator>磯貝, 紘二</dc:creator>
          <dc:creator>新本, 康久</dc:creator>
          <dc:creator>渡部, 洋八郎</dc:creator>
          <dc:creator>Isogai, Koji</dc:creator>
          <dc:creator>Shinmoto, Yasuhisa</dc:creator>
          <dc:creator>Watanabe, Yohachiro</dc:creator>
          <dc:subject>連成モード</dc:subject>
          <dc:subject>ダイナミックストール</dc:subject>
          <dc:subject>翼振動</dc:subject>
          <dc:subject>数値シミュレーション</dc:subject>
          <dc:subject>ピッチング振動</dc:subject>
          <dc:subject>上下振動</dc:subject>
          <dc:subject>位相差</dc:subject>
          <dc:subject>ナビエ・ストークスコード</dc:subject>
          <dc:subject>推進効率</dc:subject>
          <dc:subject>推進力</dc:subject>
          <dc:subject>羽ばたきパラメータ</dc:subject>
          <dc:subject>流れ剥離</dc:subject>
          <dc:subject>後縁</dc:subject>
          <dc:subject>前縁</dc:subject>
          <dc:subject>coupled mode</dc:subject>
          <dc:subject>dynamic stall</dc:subject>
          <dc:subject>airfoil oscillation</dc:subject>
          <dc:subject>numerical simulation</dc:subject>
          <dc:subject>pitching oscillation</dc:subject>
          <dc:subject>heaving oscillation</dc:subject>
          <dc:subject>phase difference</dc:subject>
          <dc:subject>Navier Stokes code</dc:subject>
          <dc:subject>propulsive efficiency</dc:subject>
          <dc:subject>thrust</dc:subject>
          <dc:subject>feathering parameter</dc:subject>
          <dc:subject>flow separation</dc:subject>
          <dc:subject>trailing edge</dc:subject>
          <dc:subject>leading edge</dc:subject>
          <dc:description>航空宇宙技術研究所 6-7 JUN. 1996 東京 日本</dc:description>
          <dc:description>National Aerospace Laboratory 6-7 JUN. 1996 Tokyo Japan</dc:description>
          <dc:description>ナビエ・ストークスコードを用いて、ピッチング振動と上下振動が位相差をもって連成モードで振動する翼のまわりの失速現象について数値シミュレーションを行った。異なる2種の羽ばたきパラメータについて、位相差と低振動数の種々の組合わせに対して推進効率と推進力を計算し、計算から得られた各フローパターンを検討して、ダイナミック・ストール現象が推進効率と推進力におよぼす効果を詳細に論じた。ピッチング振動が上下振動よりも90度進んでいる時に最大推進効率を観測した。大振幅振動にも拘らず流れの剥離は後縁近傍の翼面上の小領域に局所化していた。90度以外の位相角については、大規模な前縁剥離が発生して推進効率は低下した。</dc:description>
          <dc:description>Numerical simulation of dynamic stall phenomena around an airfoil oscillating in a coupled mode, where the pitching and heaving oscillations have some phase differences, has been performed using the Navier-Stokes code. The propulsive efficiency and the thrust have been calculated for various combinations of the phase difference and the reduced frequency for two different feathering parameters, and the effects of the dynamic stall phenomena on the behaviors of the propulsive efficiency and thrust are also discussed in detail by examining each flow pattern obtained. The highest efficiency has been observed for the case where the pitching oscillation advances 90 deg over the heaving oscillation, for which the flow separation is confined in the small region on the airfoil surface near the trailing edge in spite of the large amplitude oscillations. For phase angles other than 90 deg the efficiency is degraded by the occurrence of the large scale leading edge separation.</dc:description>
          <dc:description>資料番号: AA0000685049</dc:description>
          <dc:description>レポート番号: NAL SP-34</dc:description>
          <dc:description>conference paper</dc:description>
          <dc:publisher>航空宇宙技術研究所</dc:publisher>
          <dc:publisher>National Aerospace Laboratory (NAL)</dc:publisher>
          <dc:date>1997-01</dc:date>
          <dc:format>application/pdf</dc:format>
          <dc:identifier>航空宇宙技術研究所特別資料</dc:identifier>
          <dc:identifier>34</dc:identifier>
          <dc:identifier>275</dc:identifier>
          <dc:identifier>284</dc:identifier>
          <dc:identifier>Special Publication of National Aerospace Laboratory</dc:identifier>
          <dc:identifier>0289-260X</dc:identifier>
          <dc:identifier>AN10097345</dc:identifier>
          <dc:identifier>https://jaxa.repo.nii.ac.jp/record/36908/files/nalsp0034049.pdf</dc:identifier>
          <dc:identifier>https://jaxa.repo.nii.ac.jp/records/36908</dc:identifier>
          <dc:language>jpn</dc:language>
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