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Ti-based Quasicrystal Layers Produced by Plasma Thermal Spraying
Takasaki Akito,Uematsu Susumu,Kelton K.F. 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
[ ] powders were thermally sprayed onto mild steel substrates in air and under a reduced pressure of argon. Several oxides were formed after thermally-spraying the mechanically-alloyed powders in air. After spraying in a reduced pressure of argon, the coating layers obtained from the gently mixed powders consisted of the elemental metals, but an amorphous phase primarily appeared in the thermally-sprayed mechanically-alloyed powders, which transformed into the icosahedral quasicrystal phase and a minor crystal phase after annealing at 828 K. The Vickers hardness and the contact angle with pure water for the quasicrystal layers were about 7 GPa and respectively.
Wells Turbine for Wave Energy Conversion -Effect of Trailing Edge Shape-
Takasaki, Katsuya,Tsunematsu, Tomohiro,Takao, Manabu,Alam, M M Ashraful,Setoguchi, Toshiaki Korean Society for Fluid machinery 2016 International journal of fluid machinery and syste Vol.9 No.4
The present study reported of the use of special shaped blade to reduce the difference in pressure across the Wells turbine for wave energy conversion. The blade profile was composed of NACA0020 airfoils and trailing edge was notched like chevron. Experiments were performed investigating the influence of trailing edge shape on the turbine performance. Four notch depths were used to investigate the effect of depth of cut on the turbine performance. As results, by placing a notch-cut at the trailing edge of the blade, it was possible to reduce the pressure difference across the turbine without lowering the efficiency. In addition, the pressure difference substantially reduced at a constant rate with the increase of the cut ratio.
Wells Turbine for Wave Energy Conversion
Katsuya Takasaki,Tomohiro Tsunematsu,Manabu Takao,M M Ashraful Alam,Toshiaki Setoguchi 한국유체기계학회 2016 International journal of fluid machinery and syste Vol.9 No.4
The present study reported of the use of special shaped blade to reduce the difference in pressure across the Wells turbine for wave energy conversion. The blade profile was composed of NACA0020 airfoils and trailing edge was notched like chevron. Experiments were performed investigating the influence of trailing edge shape on the turbine performance. Four notch depths were used to investigate the effect of depth of cut on the turbine performance. As results, by placing a notch-cut at the trailing edge of the blade, it was possible to reduce the pressure difference across the turbine without lowering the efficiency. In addition, the pressure difference substantially reduced at a constant rate with the increase of the cut ratio.
Class Material Presentation Aimed at Communication between Student and Teacher
Mitsuhiro Takasaki,Kiyoshi Yonemitsu,Takaaki Koga,Toshiko Fujii,Masami Tashiro,Kouji Nagatani,Takatoshi Nakamura,Kazuhiro Sumi,Shigeru Hoyashita 한국콘텐츠학회 2012 ICCC International Digital Design Invitation Exhib Vol.2012 No.12