Search Results:　 1-12 of 12

  • 1

    Aerodynamic Properties of an Arrow : Comparison between flight-experiments and wind tunnel experiments  [in Japanese]

    SUZUKI Kazufumi , MIYAZAKI Takeshi , MASUI Kazunori , MUKAIYAMA Keita , SAWADA Hideo

    … In order to investigate Re-dependence of the drag coefficient, we developed a new arrow-launching system using compressed air as a power source, which enabled us to launch an arrow at an arbitrary velocity (less than 50m/sec). … These results are consistent with those from support-free wind tunnel measurements using JAXA 60cm Magnetic Suspension and Balance System (MSBS), confirming that the point-shape has a crucial effect on the laminar-turbulent transition of the boundary layer. …

    Proceedings, ... meeting of Japan Society of Fluid Mechanics 2010, 301, 2010-09-09

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  • 2

    Aerodynamic Properties of an Arrow : Influence of Point-shape on the Boundary Layer Transition  [in Japanese]

    Suzuki Kazufumi , Masui Kazunori , Mukaiyama Keita , Miyazaki Takeshi , Sawada Hideo

    クロスボウの矢の飛翔状態を高速度ビデオカメラで撮影し,その速度減速率を解析して,矢の抗力係数を算出した.圧縮空気を使用する矢の発射装置を開発し,発射速度を連続的に変化させて(最速50[m/sec]),抗力係数のRe数依存性を調べた.3種類の鏃(椎型,流線形,凹凸型)を装着したところ,測定されたRe数領域(0.78×10^6<Re<1.65×10^6)では,矢側面の境界層が層流である場合 …

    Journal of Japan Society of Fluid Mechanics 29(4), 287-296, 2010-08-25

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  • 3

    A-30 Development of four components road cell by air suspension bearing : Wind tunnel measurements of air force on highly spinning golf ball  [in Japanese]

    KOMAKI Takefumi , MIZOTA Taketo , NARUO Takeshi , NAGAMINE Hikaru , NAKAMURA Hiroyuki

    … We are challenging this problems using newly introducing air suspension balance method. … Atmospheric and supplying air pressure change on air force of Z-direction measurement are studied by introducing cancelling technique by using a dummy balance. … In this stage, cancelling result of atmospheric and supplying air pressure change is shown. …

    ジョイント・シンポジウム講演論文集 : スポーツ工学シンポジウム : シンポジウム:ヒューマン・ダイナミックス : symposium on sports engineering : symposium on human dynamics 2009, 157-159, 2009-12-02

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  • 4

    A12 Development of air suspended balance for sports ball aerodynamic force measurement  [in Japanese]

    Komaki Takefumi , mizota Taketo , Naruo Takeshi , Tanaka Katsutoshi

    … We are trying this problem by air suspension balance method. … Some valuations of atmospheric and supplying air pressure change effects on air force of Z-direction measurement of wind tunnel experiments are studied by introducing cancelling technique by using a dummy balance. …

    ジョイント・シンポジウム講演論文集 : スポーツ工学シンポジウム : シンポジウム:ヒューマン・ダイナミックス : symposium on sports engineering : symposium on human dynamics 2008, 65-66, 2008-11-05

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  • 5

    0542 Evaluation of CO_2 sorption capacity of rocks for CO_2 geological sequestration  [in Japanese]

    FUJII Takashi , SATO Yoshiyuki , LIN Hongfei , SASAKI Kenta , TAKAHASHI Toru , INOMATA Hiroshi , HASHIDA Toshiyuki

    … In this study, CO_2 sorption capacity of rocks (granite, sandstone and natural quartz) under air dry condition was evaluated experimentally at temperatures of 50 and 100℃, and pressures up to 20MPa using a magnetic suspension balance (MSB), which allows us to measure the rock weight under the presence of supercritical CO_2. …

    年次大会講演論文集 : JSME annual meeting 2007(3), 113-114, 2007-09-07

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  • 6

    MEASUREMENTS OF ADSORPTION ISOTHERM OF VARIOUS BUILDING AND ADSORPTION MATERIALS  [in Japanese]

    ATAKA Yuji , KATO Shinsuke , ZHU Qingyu , SEO Jang-Hoo , HASEGAWA Ayumi

    … It is very important to evaluate the adsorption and desorption property of the building materials for the indoor air pollution problem. … Recently the adsorption materials and the adsorptive building materials that reduce the indoor air pollutant concentration are developed and become to be used in Japan. …

    Journal of environmental engineering (595), 49-55, 2005-09-30

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  • 7

    A401 QUASI-STATIC ANALYSIS OF THE WHEEL LOAD VARIATION OF PNEUMATIC SUSPESION RAILWAY VEHICLES ON TWISTED CURVES

    Nishimura Seiichi , Sato Kunihito , Ishikawa Ryutaro , Hirabayashi Kenichi

    … Railway vehicles of pneumatic suspension have a tendency to produce large wheel road variation on a twisted curve due to operation of the height control valve of air springs installed between both side air springs of the truck. … In this paper, equations of moment equilibrium of the pneumatic suspension vehicle on the twisted curves are introduced quasi-statically, and effects of nonlinear characteristics of the height control system on the wheel load variation are analyzed. …

    Proceedings of International Symposium on Seed-up and Service Technology for Railway and Maglev Systems : STECH 2003, 190-195, 2003-00-00

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  • 8

    117 Multibody Dynamics and Contol of Railway Vehicle Running a Curve  [in Japanese]

    MIZUTANI Hironobu , MURAOKA Daisuke , YOSHIDA Kazuo

    … Therefore, it is effective to control them in order to balance each wheel-load and to reduce lateral wheel-rail force. … Furthermore, motion control using air suspension is attempted. …

    Dynamics and Design Conference 2001(7), 64-67, 2001-04-20

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  • 9

    Dynamic Load/Unload Simulation of a Magnetic Head Slider  [in Japanese]

    HONCHI Masayuki , TAKAHASHI Haruhide , HAMAGUCHI Tetsuya , SAEGUSA Shozo

    … In this simulation, the generalized lubrication equation based on the linearized Boltzmann equation and the suspension motion equation are solved simultaneously in the time domain. … The suspension is modeled as lumped vibration system. … To simulate contact condition of the suspension motion during unload process, the suspension model consists of 4 status depend on the contact conditions of tab, dimple and limiter. …

    Conference on Information, Intelligence and Precision Equipment : IIP 2000, 184-189, 2000-03-24

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  • 10

    Size-selective Collection Characteristics of Andersen Air Sampler

    MUKAIDA Kenichi , UCHIUMI Masaru , USAMI Hitoshi , SATOH Takashi , OKINO Michio , TANJI Tatsuo , MOCHIZUKI Sadamu

    … Size-selective collection of aerosol particles was performed by the collision to the liquid surface in Andersen Air Sampler composed of six nozzle plates, and then analysis of the liquid suspension for the particle size distribution and the particle concentration was conducted by Coulter Counter. … The disintegration effect of air turbulence was positive for glass powder, and negative for flyash. …

    Earozoru Kenkyu 3(4), 306-313, 1988

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  • 11

    Studies on the Multi-stage Reactor of Gas Liquid Counter-flow Type. I. : Air Oxidation of Furfural in Liquid Phase containing Ag_2O-CuO Catalyzer Suspension  [in Japanese]

    Okada Jutaro , Morita Shushi , Matsuda Yoshihisa

    … Air oxidation of furfural in alkaline solution at 40° in the presence of Ag_2O-CuO catalyst was studied, employing a batch reactor and a multi-stage contactor of gas-liquid counter-flow type. … Assuming the fictious equilibrium lines for absorption and desorption, mass balance equations for each stage were obtained. …

    Journal of the Pharmaceutical Society of Japan 86(10), 932-943, 1966-10-25

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  • 12

    Magnetic Anisotropy Measurement of MnO Single Crystal

    UCHIDA Enji , KONDOH Hisamoto , NAKAZUMI Yoshihide , NAGAMIYA Takeo

    … The magnetic anisotropy of MnO single crystal, grown by the Verneuil method, was measured using a torque balance. … The results of the torque measurements at liquid air temperature could be summarized within experimental errors by a formula T = C_1H^2sin(2θ + ε_1) + C_2H^4sin(4θ + ε_2) + C_3H^6, where H is the applied field intensity, θ the angle of rotation of H relative to the crystal, and ε's and C's are constants which depend in a certain way on the kind of crystallographic axis of suspension. …

    Journal of the Physical Society of Japan 15(3), 466-474, 1960-03-05

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