巻号一覧
26 巻, 297 号
選択された号の論文の7件中1～7を表示しています
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高山 捷一1978 年 26 巻 297 号 p. 489-499
発行日: 1978/10/05
公開日: 2009/07/09
ジャーナル フリーPDF形式でダウンロード (584K) -
中村 信二1978 年 26 巻 297 号 p. 500-509
発行日: 1978/10/05
公開日: 2009/07/09
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竹野 忠夫1978 年 26 巻 297 号 p. 510-518
発行日: 1978/10/05
公開日: 2009/07/09
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雛田 元紀1978 年 26 巻 297 号 p. 519-529
発行日: 1978/10/05
公開日: 2009/07/09
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藤綱 義行1978 年 26 巻 297 号 p. 530-532
発行日: 1978/10/05
公開日: 2009/07/09
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二項および四項翼の最適化倉田 光雄1978 年 26 巻 297 号 p. 533-540
発行日: 1978/10/05
公開日: 2009/07/09
ジャーナル フリーIn this paper, an optimum problem of supercavitating hydrofoils at nonzero cavitation number is treated by the linearized theory. Namely, the purpose of this paper is to determine the foil profile which has minimum drag coefficient under the given lift coefficient, angle of attack, foil length, and cavitation number. Optimum profiles are determined by using calculus of variation. The foil configuration is limited to the so-called two-term and four-term hydrofoils.
The foil configuration and the lift-drag ratio are obtained under various given above conditions.
The results obtained in this paper are summerized as follows:
(1) When the lift coefficient, angle of attack, and foil length are fixed, the lift-drag ratio of the optimum hydrofoil with nonzero cavitation number is greater than that with zero cavitation number.
(2) The difference of the lift-drag ratio between the two-term and four-term hydrofoil is only a few percents. Consequently, it may be seen that the results of the optimum hydrofoils are dominant in the problem of the optimum hydrofoils.
(3) It is seen that the foil configurations which have the maximum lift-drag ratio in the optimum hydrofoils with same lift coefficient, attack of angle, and foil length are almost independent of the cavitation number.抄録全体を表示PDF形式でダウンロード (432K) -
桑原 宏成1978 年 26 巻 297 号 p. 541-550
発行日: 1978/10/05
公開日: 2009/07/09
ジャーナル フリーA theoretical investigation on the compressible laminar mixing along a curved streamline is presented.
The fundamental equations referred to the streamline coordinates are simplified by the boundary layer approximation and by applying the condition for the streamline curvature not to be over unity.
Using the Crocco type particular solution of energy equation, a similar solution for the flow of isoenergy is obtained in the case of constant pressure along the stream.
Effects of streamline curvature and compressibility on the distributions of velocity, density, pressure, temperature and so on are calculated.抄録全体を表示PDF形式でダウンロード (553K)
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