WEKO3
アイテム
Huto no Kabe ga Mokei no Yoryoku-keisu ni oyobosu Eikyo ni tuite.(Tuduki)
https://jaxa.repo.nii.ac.jp/records/35340
https://jaxa.repo.nii.ac.jp/records/35340e00ac667-b6ce-4560-ab26-a3c8e43d880b
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
SA4146516.pdf (539.2 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||
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| 公開日 | 2015-03-26 | |||||||
| タイトル | ||||||||
| タイトル | Huto no Kabe ga Mokei no Yoryoku-keisu ni oyobosu Eikyo ni tuite.(Tuduki) | |||||||
| 言語 | ||||||||
| 言語 | jpn | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||
| 資源タイプ | departmental bulletin paper | |||||||
| その他のタイトル（英） | ||||||||
| その他のタイトル | On the Effect of the Walls of a Wind Tunnel upon the Lift Coefficient of a Model. (Continued) | |||||||
| 著者 |
SASAKI, Tatudiro
× SASAKI, Tatudiro
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| 出版者 | ||||||||
| 出版者 | 東京帝國大學航空研究所 | |||||||
| 出版者（英） | ||||||||
| 出版者 | Aeronautical Research Institute, Tokyo Imperial University | |||||||
| 書誌情報 |
東京帝國大學航空研究所報告 en : Report of Aeronautical Research Institute, Tokyo Imperial University 巻 6, 号 77, p. 315-339, 発行日 1931-12 |
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| 抄録（英） | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | Introduction. In the previous paper I have investigated the variation of lift and drag on a model wing in a wind tunnel. The first part of the paper dealt with the case of a flat plate between parallel walls. Recently Rosenhead re-investigated this case and obtained a different result. In the second part of my paper I have dealt with the case of a flat plate in an unbounded jet of air. For this case von Karman has obtained an approximate formula which is in close agreement with mine. It was considered that the case in which the model is put in an unbouned jet of air does not represent the case of a wind tunnel of Gottingen and Eiffel type, and the mouthes of the tunnel must have some effect. For the effect of the exit wall L. Poggi has derived a formula, which shows this effect is very small. Ono also has calculated this effect independently. In the present paper I have treated the problem in a different way, and in the third part of the paper I have investigated the effect of both the exit and the collector walls of the wind tunnel. I. The effect of an exit wall. The form of the flow in this case is shown in Fig.1. The air flows from infinity with the velocity -U between parallel walls till the exit, out of which the air flows as a free jet and impinging upon the model the direction of it is deflected. It is theoretically possible to treat this kind of flow as a two dimensional problem in hydrodynamics, but as it is mathematically very complicated we treat the case shown in Fig.2, which represents infinite number of parallel walls and models. It is enough to consider the region ABPP'B'A', if we obtain some functions with the period id. If we consider the region between two stream lines along AB and A'B' the form of flow resembles very much to that of Fig.1, and so the lift and drag on the model calculated in both cases will be nearly equal. This was proved formerly in my paper in the case where the walls are absent. The analysis is made and the result is shown in the expression (6). II. The case in which the model is replaced by a point vortex. The case resembles to the case treated by Poggi, and the result is the same as that obtained by him. The result is shown in the expression (7). III. The effect of both the exit and the collector walls. The form of flow is shown in Fig.12, and the result is shown in the expression (8). It is shown from the results of investigation made in this paper, the effects of both the exit and the collector walls are very small, and so we can consider as though both the mouthes are absent and the model is put in a free jet in treating the lift and drag on a wing model in a wind tunnel of Gottingen and Eiffel type. | |||||||
| 書誌レコードID | ||||||||
| 収録物識別子タイプ | NCID | |||||||
| 収録物識別子 | AA00387631 | |||||||
| 資料番号 | ||||||||
| 内容記述タイプ | Other | |||||||
| 内容記述 | 資料番号: SA4146516000 | |||||||
