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        <identifier>oai:jaxa.repo.nii.ac.jp:00044978</identifier>
        <datestamp>2023-06-20T21:47:30Z</datestamp>
        <setSpec>1887:1893</setSpec>
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          <dc:title xml:lang="en">Time Response Approach to Numerical Computation of Asymptotic Series in Unsteady Aerodynamics for a Lifting Surface in Incompressible Flow</dc:title>
          <jpcoar:creator>
            <jpcoar:creatorName>宮澤, 與和</jpcoar:creatorName>
          </jpcoar:creator>
          <jpcoar:creator>
            <jpcoar:creatorName xml:lang="en">MIYAZAWA, Yoshikazu</jpcoar:creatorName>
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          <datacite:description descriptionType="Abstract">非定常空気力における周波数応答の漸近級数を求める新しい数値計算方法を提案した。これは,周波数応答の漸近級数とある特定の入力に対する時間応答のマクローリン級数の各係数の関係を利用するものである。時間応答のマクローリン級数は,流れの数値シュミレーションより推定することができる。この計算は,調和解析より導かれた積分方程式から直接漸近級数を計算するのに比べて容易である。この報告では,非圧縮ポランシアル流れ中におかれた揚力面を扱い,流れのシュミレーションには渦格子を用いる方法を使用した。この方法について説明し,得られた数値例も示した。2次元流れ中に置かれた翼の計算結果については,解析解と比較し,その計算精度について考察した。</datacite:description>
          <datacite:description descriptionType="Other">A new method for computing an asymptotic series of frequency response functions in unsteady aerodynamics is proposed. This method utilizes the consistency of the asymptotic series coefficients in the frequency response function and Maclaurin series coefficients in the corresponding time response to a specific input. The Maclaurin series in time response is estimated from a numerical simulation of the flow field. The computation is esier than direct handling of the integral equation for the simple harmonic analysis of unsteady aerodynamics. The system considered in this paper is a lifting surface in incompressible potential flow. Numerical examples obtained by using the vortex lattice method are shown. The result in a two-dimensional flow case is compared with analytical solutions to show the accuracy of the proposed method.</datacite:description>
          <datacite:description descriptionType="Other">資料番号: NALTR0721000</datacite:description>
          <datacite:description descriptionType="Other">レポート番号: NAL TR-721T</datacite:description>
          <dc:publisher>航空宇宙技術研究所</dc:publisher>
          <dc:publisher>National Aerospace Laboratory(NAL)</dc:publisher>
          <datacite:date dateType="Issued">1982-08</datacite:date>
          <dc:language>eng</dc:language>
          <dc:type rdf:resource="http://purl.org/coar/resource_type/c_18gh">technical report</dc:type>
          <jpcoar:identifier identifierType="URI">https://jaxa.repo.nii.ac.jp/records/44978</jpcoar:identifier>
          <jpcoar:sourceIdentifier identifierType="ISSN">0389-4010</jpcoar:sourceIdentifier>
          <jpcoar:sourceTitle xml:lang="en">Technical Report of National Aerospace Laboratory TR-721T</jpcoar:sourceTitle>
          <jpcoar:volume>721T</jpcoar:volume>
          <jpcoar:pageStart>19</jpcoar:pageStart>
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            <jpcoar:extent>1.2 MB</jpcoar:extent>
            <datacite:date dateType="Available">2020-01-29</datacite:date>
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