Search Results - "Yamagata, Takayuki"

Simultaneous observation of cavitation collapse and shock wave formation in cavitating jet by Fujisawa, Nobuyuki, Fujita, Yasuaki, Yanagisawa, Keita, Fujisawa, Kei, Yamagata, Takayuki

“…•Cavitating jet is visualized by shadowgraph and laser schlieren methods.•Shock wave is formed at the instant of cloud collapse near wall.•Impulsive forces are…”
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Mass and momentum transfer characteristics in and downstream of 90° elbow by Ikarashi, Yuya, Taguchi, Shoichi, Yamagata, Takayuki, Fujisawa, Nobuyuki

“…•Mass transfer characteristics in and downstream of 90° elbow is studied.•Mass transfer characteristics is measured by plaster dissolution method.•Flow…”
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Synchronization of dual diffusion flame in co-flow by Fujisawa, Nobuyuki, Imaizumi, Kenta, Yamagata, Takayuki

“…•Interaction of two adjacent diffusion flames were experimentally investigated.•Direct imaging demonstrated the presence of various synchronization modes of…”
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Experimental and numerical studies on the performance of a waterfall-type cross-flow hydraulic turbine by Shikama, Hayato, Wang, Tianbo, Yamagata, Takayuki, Fujisawa, Nobuyuki

“…The performance of a waterfall-type cross-flow hydraulic turbine was investigated via experiment and numerical simulation. The experiment was carried out using…”
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Effect of blade profile on the efficiency of a waterfall cross-flow hydro turbine by Wang, Tianbo, Yamagata, Takayuki, Fujisawa, Nobuyuki

“…The effect of blade profile on the efficiency of a waterfall cross-flow hydro turbine was investigated numerically using the non-uniform, thin, and standard…”
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Mass transfer measurements on periodic roughness in a circular pipe and downstream of orifice by Fujisawa, Nobuyuki, Uchiyama, Kazuya, Yamagata, Takayuki

“…•Mass transfer characteristics on periodic roughness is studied.•Flow in circular pipe and downstream of orifice is examined.•Mass transfer in rough pipe is 2…”
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Observation of large-scale structure in flickering diffusion flame by time-resolved particle image velocimetry and shadowgraph imaging by Fujisawa, Nobuyuki, Sakai, Kazuki, Yamagata, Takayuki

“…•Velocity field of flickering diffusion flame was studied experimentally.•Time-resolved PIV combined with POD allows for studying velocity field.•Periodic…”
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Influence of elbow curvature on flow and turbulence structure through a 90° elbow by Ikarashi, Yuya, Uno, Taku, Yamagata, Takayuki, Fujisawa, Nobuyuki

“…•The influence of elbow curvature on the flow through a 90° elbow was studied.•Flow separation occurred on inner wall with decreasing radius ratio.•The…”
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Experimental and numerical studies on mass transfer characteristics behind an orifice in a circular pipe for application to pipe-wall thinning by Yamagata, Takayuki, Ito, Akihiro, Sato, Yuki, Fujisawa, Nobuyuki

“…•Pipe-wall thinning due to flow accelerated corrosion is studied.•Mass transfer downstream of orifice in a circular pipe was investigated.•Mass transfer…”
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Mass and momentum transfer characteristics in 90° elbow under high Reynolds number by Taguchi, Shoichi, Ikarashi, Yuya, Yamagata, Takayuki, Fujisawa, Nobuyuki, Inada, Fumio

“…Mass and momentum transfer characteristics in a 90° elbow with a radius to pipe diameter ratio of 1.5 are studied experimentally with the aid of the plaster…”
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Flickering characteristics and temperature field of premixed methane/air flame under the influence of co-flow by FUJISAWA, Nobuyuki, ABE, Takao, YAMAGATA, Takayuki, TOMIDOKORO, Hirofumi

“…The flickering characteristics and the temperature field of an axisymmetric premixed methane/air flame under the influence of co-flow are studied…”
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Numerical analysis on the wall-thinning rate of a bent pipe by liquid droplet impingement erosion by Fujisawa, Nobuyuki, Wada, Keitaro, Yamagata, Takayuki

“…This paper presents a numerical analysis of liquid droplet impingement (LDI) erosion in the pipeline of nuclear/fossil power plants. The numerical method is…”
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Erosion Mechanism of a Cavitating Jet on Groove Roughness by Fujisawa, Nobuyuki, Yamagata, Takayuki, Seki, Ryotaro, Ohki, Motofumi

“…The erosion behavior of a cavitating jet on groove roughness was investigated experimentally using mass-loss characteristics, scanning electron microscopy…”
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Attenuation of wall-thinning rate in deep erosion by liquid droplet impingement by Fujisawa, Nobuyuki, Yamagata, Takayuki, Wada, Keitaro

“…•Liquid droplet impingement erosion is studied in deep erosion.•Wall-thinning rate is attenuated with increasing erosion depth.•SEM observation shows change of…”
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The influence of material hardness on liquid droplet impingement erosion by Fujisawa, Nobuyuki, Yamagata, Takayuki, Takano, Shotaro, Saito, Kengo, Morita, Ryo, Fujiwara, Kazutoshi, Inada, Fumio

“…•Liquid droplet impingement erosion is studied for various metal materials.•Average power dependency on droplet velocity is found as 7.•Power dependency on…”
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Non-axisymmetric wall-thinning downstream of elbow–orifice pipeline in swirling flow by Fujisawa, Nobuyuki, Yamagata, Takayuki, Kanatani, Nobuaki, Watanabe, Ryuta

“…•Pipe-wall thinning due to flow accelerated corrosion is studied.•Flow downstream of elbow–orifice pipeline is examined.•Non-axisymmetry of flow is analyzed by…”
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The mechanism of asymmetric pipe-wall thinning behind an orifice by combined effect of swirling flow and orifice bias by Fujisawa, Nobuyuki, Yamagata, Takayuki, Kanno, Syo, Ito, Akihiro, Takano, Tsuyoshi

“…► The mechanism of asymmetric pipe-wall thinning is clarified. ► Flow fields and pipe-wall thinning are evaluated experimentally for orifice flow. ► We…”
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Effect of Contraction Width on the Vortex Formation of Viscoelastic Flow in Asymmetric Planar Contractions by Takayuki YAMAGATA, Takahiro YAJIMA, Nobuyuki FUJISAWA

“…In this paper, the flow behavior of viscoelastic fluid in asymmetric planar contraction geometry is studied by flow visualization and PIV measurement…”
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Comparative study of mass transfer distributions and oil-flow visualizations with image analysis on long and short 90° elbows by Fujisawa, Nobuyuki, Takizawa, Tomohiro, Yamagata, Takayuki

“…•Mass transfer distributions in and downstream of long and short 90° elbows were studied.•Surface-flow visualization technique was proposed using oil-flow…”
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Liquid droplet impingement erosion on groove roughness by Fujisawa, Kei, Yamagata, Takayuki, Fujisawa, Nobuyuki

“…•Liquid droplet impingement erosion was numerically and experimentally studied on groove rough surface.•The maximum pressure at the groove bottom suffers from…”
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