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熱線を3本用いた低速用直示式風速計の試作
https://jaxa.repo.nii.ac.jp/records/44984
https://jaxa.repo.nii.ac.jp/records/44984592ff662-cc8f-4bb4-b5d5-bf6ef9eb4770
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
naltr00727.pdf (1.1 MB)
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| Item type | テクニカルレポート / Technical Report(1) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2015-03-26 | |||||||||
| タイトル | ||||||||||
| タイトル | 熱線を3本用いた低速用直示式風速計の試作 | |||||||||
| 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_18gh | |||||||||
| 資源タイプ | technical report | |||||||||
| その他のタイトル（英） | ||||||||||
| その他のタイトル | Anemometer with Direct Velocity Indication Using Three Thin Wires for Low Wind Velocity | |||||||||
| 著者 |
高木, 正平
× 高木, 正平
× TAKAGI, Shohei
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| 著者所属 | ||||||||||
| 航空宇宙技術研究所新型航空機研究グループ | ||||||||||
| 著者所属（英） | ||||||||||
| en | ||||||||||
| V/STOL Aircraft Research Group, National Aerospace Laboratory(NAL) | ||||||||||
| 出版者 | ||||||||||
| 出版者 | 航空宇宙技術研究所 | |||||||||
| 出版者（英） | ||||||||||
| 出版者 | National Aerospace Laboratory(NAL) | |||||||||
| 書誌情報 |
航空宇宙技術研究所報告 en : Technical Report of National Aerospace Laboratory TR-727 巻 727, p. 9, 発行日 1982-08 |
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| 抄録（英） | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | An anemometer using a heat wake method for low wind velocity was constructed. The aim is to indicate directly the mean flow velocity. The method makes use of three thin wires mounted on a simple body. The wires are held parallel to each other in the plane perpendicular to the flow direction. By heating the upstream wire with a periodical current, the thermal oscillation was introduced into the flow. The time taken for the thermal oscillation to connect between the two downstream wires which serve as thermal senssors, is inversely proportional to mean velocity. When the thermal frequency with the lowest value was adjusted to keep the ratio of the convection time and the thermal period constant, its frequency should become proportional to the velocity. Keeping the value of one half as this ratio, the system with two sensors about 0.4mm apart was calibrated on a towing truck with a constantly known speed in a calm air. The convection velocity of the thermal oscillation independent of its frequency was found to be equal to about 80 percent of the mean velocity. The mean velocity from 0.3m/sec to 2m/sec was successfully measured with good linearity to the heating frequency. If the ratio were reduced to one fourth or one eighth, the high-velocity limit for the velocity measurement could be easily extended to two or four times respectively larger than that in the present calibration. | |||||||||
| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 0389-4010 | |||||||||
| 資料番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 資料番号: NALTR0727000 | |||||||||
| レポート番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | レポート番号: NAL TR-727 | |||||||||
