超はっ水性回転円板のニュートン流体における摩擦抵抗の低減について〔流体工学, 流体機械〕
スポンサーリンク
概要
- 論文の詳細を見る
By use of a highly water-repellent coating wall, a new type of drag reduction for a rotating disk in a Newtonian fluid has been found experimentally. Measurements were carried out to investigate the torque of rotating disks with a highly water-repellent wall and with a smooth aluminum wall. The clearance between the disk and the wall was varied, at 5,10,and 20mm. The tested fluids were tap water and aqueous solutions of glycerin at concentrations of 30 and 40wt%. The experimental data of the frictional moment of the rotating disk obtained using the highly water-repellent wall were smaller than those of the smooth aluminum rotating disk. It was shown that the maximum drag reduction ratio was about 45% in a 40wt% glycerin solution at about Re=10^5. and the viscosity of the fluid has a slight effect on the drag reduction.
- 1997-08-25
論文 | ランダム
- ブロイラ-輸送かご消毒用薬液の交換適期の検討--消毒槽内薬液の残存殺菌力の測定
- C204 直流電位差法を用いたステンレス鋼平板表面に存在する応力腐食割れの検知(亀裂の検査・モニタリング技術-(1),OS5 保全・設備診断技術),動力エネルギーシステム部門20周年,次の20年への新展開)
- 22aTG-4 イオンゲルを用いた発光トランジスタ(22aTG 発光/電界効果デバイス,領域7(分子性固体・有機導体))
- 21aTG-4 金属・半導体分離SWNT薄膜の1次元的伝導特性(21aTG ナノチューブ1,領域7(分子性固体・有機導体))
- 宇宙機における化学の役割(ヘッドライン:宇宙と化学)