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井門 敦志 , 宮地 徳蔵 , 井上 達哉 他

鉄道総研報告 = RTRI report : 鉄道総合技術論文誌 27(1), 41-46, 2013-01-00

SUZUKI Hiroshi , KONAKA Takanori , KOMODA Yoshiyuki , ISHIGAMI Toru , FUDABA Taketo

Journal of chemical engineering of Japan 45(1), 136-141, 2012-03-01

References (15)

Takagi Youhei , Okano Yasunori , Miyayaga Masatoshi , Katayama Nobuyuki

… The effect of flow field on drag torque in a wet clutch was examined through numerical and physical experiments. … Three-dimensional hydrodynamic numerical simulations were carried out, and the drag torque was measured experimentally for a single wet clutch pack. … At low rotation speeds, the oil flow was of single-phase, and the drag torque was linearly proportional to the rotation speed since the wall shear stress increased monotonically. …

Tribology Online 7(4), 242-248, 2012

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AOKI Katsumi , MUTO Koji , OKANAGA Hiroo

… The purpose of the present study is to clarify the mechanism of drag reduction for a sphere with arc type dimples. … Therefore, the drag coefficient of a dimpled sphere was smaller than that of a smooth sphere. … However, the separation point shifted to the upstream side and the drag coefficient became larger in the super-critical Reynolds number region. …

Journal of Fluid Science and Technology 7(1), 1-10, 2012

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MOTOZAWA Masaaki , KUROSAWA Taiki , OTSUKI Tomohiro , IWAMOTO Kaoru , ANDO Hirotomo , SENDA Tetsuya , KAWAGUCHI Yasuo

… Experimental investigation of the relationship between mass transfer and turbulent drag reduction of the drag-reducing channel flow with dosed polymer solution from a wall was carried out. … In contrast, when the polymer solution was dosed from the wall, the diffusion was largely suppressed in the near-wall region and drag reduction occurred. …

Journal of Thermal Science and Technology 7(1), 272-287, 2012

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KUMAGAI Ichiro , 大薮 剛志 , 櫛田 崇文 , MURAI Yuichi , TASAKA Yuji , 高橋 義明

… We have invented a new power-saving device for ship drag reduction using microbubbles in order to reduce CO2 emissions from ships. … Emissions can be reduced by about 87 million CO2 ton/year if international shipping uses this new device, with 10% net-power reduction. …

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 78(787), 500-503, 2012

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YASUE Kanako , SAWADA Keisuke

… It is also shown that the amount of drag reduction can be overestimated due to the model deformation effect. …

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 55(5), 321-331, 2012

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Ushida Akiomi , Hasegawa Tomiichi , Narumi Takatsune , Amaki Keiko , Kayaba Ryuichi

The pressure drops and frictional coefficients were measured and estimated for water, microbubble/water mixtures (MB water), and complex fluids (surfactant solutions and polymer solutions) in capillar …

Nihon Reoroji Gakkaishi 40(4), 179-184, 2012

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