MATSUI Jun

Affiliation

Faculty of Engineering, Division of Systems Research

Job Title

Professor

Research Fields, Keywords

Fluid Machinery, Fluid Dynamics

Mail Address

E-mail address

Related SDGs




The Best Research Achievement in Research Career 【 display / non-display

  • 【Published Thesis】 Similarity on Occurrence Condition of Vortexes in Pump Sumps  2016.03

    【Published Thesis】 Numerical Study on the Internal Flow and Torque in Variable Capacity Type Fluid Coupling  2008.03

    【Published Thesis】 Study on Control of Axial Thrust in Centrifugal Pump by User of J-Groove  2008.02

The Best Research Achievement in the last 5 years 【 display / non-display

Education 【 display / non-display

  •  
    -
    1993

    The University of Tokyo   Doctor Course   Completed

  •  
    -
    1988

    The University of Tokyo   Department of Mechanical Engineering   Graduated

Degree 【 display / non-display

  • Doctor of Engineering - The University of Tokyo

Campus Career 【 display / non-display

  • 2009.1
     
     

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Systems Research   Professor  

  • 2007.4
    -
    2008.12

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Systems Research   Associate Professor  

  • 2001.4
    -
    2007.3

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Systems Research   Associate Professor  

  • 1996.4
    -
    2001.3

    Duty   Yokohama National UniversitySchool of Engineering   Associate Professor  

  • 1993.4
    -
    1996.3

    Duty   Yokohama National UniversitySchool of Engineering   Lecturer  

display all >>

Academic Society Affiliations 【 display / non-display

  •  
     
     
     

    日本機械学会

  •  
     
     
     

    ターボ機械協会

Research Areas 【 display / non-display

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Fluid engineering

 

Research Career 【 display / non-display

  • study on turbomachinery

    Project Year:

Books 【 display / non-display

  • ターボポンプ(新改訂版)

    古川明徳、黒川淳一、松井純、ほか21名( Role: Joint author)

    日本工業出版株式会社 

     More details

    Language:Japanese Book type:Scholarly book

    ターボポンプについての入門から実際の利用までを網羅した教科書である。

  • コンピュータの基礎と数値計算

    森下信、松本裕昭、松井純、石塚辰美、中野健( Role: Joint author ,  13,14章)

    丸善株式会社 

     More details

    Language:Japanese Book type:Scholarly book

    コンピュータ教育の導入からプログラミングに至る、適切な教科書がなかったことから、教科書を本学の5名の教官で共著した。コンピュータの仕組み、使い方からプログラミングと数値解析の初歩までをカバーしており、講義において教科書として用いていた。

Thesis for a degree 【 display / non-display

  • 表面に衝突する単原子気体分子の動力学

    松井 純

    1993.3

    Doctoral Thesis   Single Work  

    DOI

     More details

    分子動力学の手法を用いて、固体表面における各種気体分子の散乱過程の数値シミュレーションを行った。散乱過程を統計モデルとしてまとめ、モデル定数を定めた。

  • 固体-気体境界における原子挙動の分子動力学的解析

    松井 純

    1990.3

    Master Thesis   Single Work  

     More details

    東京大学大学院 工学系研究科

    分子動力学シミュレーションについて高精度の積分法と高速な解法を開発し、レナードジョーンズ分子の表面における衝突散乱過程を明らかにした。

Papers 【 display / non-display

  • Specific Internal Flow in Balancing Hole

    YAMASHITA Yosuke, MATSUI Jun, OKUBO Atsushi

    Turbomachinery   47 ( 12 )   723 - 729   2020.3  [Reviewed]

    DOI CiNii

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Turbomachinery Society of Japan   Joint Work  

    <p>In order to research the discharge coefficient of a balancing hole <i>C<sub>d</sub></i> for a wide range of axial flow velocity <i>v</i> in the hole and rotational speed <i>u</i>, we carried out CFD simulations. Some of the results and the reported experimental data agree within the difference of about 5.3% on the pressure difference of the hole. Flow in a balancing hole is influenced by not only <i>v</i> but also <i>u</i>. Therefore the parameter <i>v</i>/<i>u</i> is considered as an important parameter of <i>C<sub>d</sub></i>. Furthermore, for very low range of <i>v</i>/<i>u</i>, we found a rare flow situation with S-shaped streamlines. Due to the strong pumping effect by rotating disk, <i>C<sub>d</sub></i> is greatly different in this region.</p>

    Other Link: https://ci.nii.ac.jp/naid/130007818387

  • Suction Vortices in a Pump Sump-Their Origin, Formation, and Dynamics

    Yamade Yoshinobu, Kato Chisachi, Nagahara Takahide, Matsui Jun

    JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME   142 ( 3 )   031110-1 - 031110-26   2020.3  [Reviewed]

    DOI Web of Science

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Joint Work  

  • LARGE EDDY SIMULATION OF A SUBMERGED VORTEX IN A SIMPLIFIED COMPUTATIONAL MODEL

    Yamade Yoshinobu, Kato Chisachi, Nagahara Takahide, Matsui Jun

    PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2019, VOL 3B   3B   2019.11  [Reviewed]

    DOI Web of Science

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Joint Work  

  • Flow structure of a submerged vortex in a pump sump

    YAMADE Yoshinobu, KATO Chisachi, NAGAHARA Takahide, MATSUI Jun

    Transactions of the JSME (in Japanese)   85 ( 878 )   19 - 00294-19-00294   2019.10  [Reviewed]

    DOI CiNii

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Japan Society of Mechanical Engineers   Joint Work  

    <p>The flow structures of a submerged vortex that appears in a model pump sump have been fully clarified by performing large eddy simulation (LES) of a model vortex in a simplified computational model. The computational model had a sufficiently fine grid that could resolve the vortex core. The model sump is composed of a 2,500 mm-long water channel of rectangular cross section with a width of 300 mm and a water height of 150 mm and a vertical suction pipe with a 100 mm diameter installed at its downstream end. Our previous large eddy simulations (LES), which used approximately 2 billion grids and were applied to the whole pump sump, has fully clarified the origin and formation mechanism of a submerged vortex and an air-entrained vortex. In these computations, however, the static pressure in the vortex core decreased by only 5 kPa at a channel velocity of 0.37 m/s. The decrease in the static pressure was far smaller than the one for which one can expect initiation of cavitation in the vortex core. In the corresponding experiment, however, appearance of a submerged vortex was confirmed by the occurrence of cavitation in the vortex core. Therefore, the decrease in the static pressure is most likely to be underpredicted in our previous LES. Insufficient grid resolution was assumed to be one of the reasons for this underprediction. In the present study, LES with a sufficiently fine grid was applied to a simplified computational model that represents the stretch of a submerged vortex under a constant acceleration of the vertical velocity. Vertical and tangential velocities obtained by averaging those profiles of a submerged vortex computed in the previous LES were prescribed at the bottom wall of the computational domain as the inflow boundary conditions. In the present LES, the static pressure has decreased by more than 100 kPa. In addition, parametric studies with different initial swirl numbers varied from 0.08 to 10.9 have fully clarified the behavior of a submerged vortex. It is found that a strong submerged vortex appears only at a relatively small range of the swirl-number from 0.8 to 2.</p>

    Other Link: https://ci.nii.ac.jp/naid/130007733868

  • Formation mechanism of suction vortices in a pump sump

    YAMADE Yoshinobu, KATO Chisachi, NAGAHARA Takahide, MATSUI Jun

    Transactions of the JSME (in Japanese)   85 ( 875 )   19 - 00072-19-00072   2019.7

    DOI CiNii

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Japan Society of Mechanical Engineers   Joint Work  

    <p>The origin and formation mechanism of a submerged vortex and an air-entraining vortex have been fully clarified by large-eddy simulation (LES) that used approximately 2 billion hexahedral elements with maximum resolution of 0.255 mm and was applied to the internal flows of a model pump sump. The model pump sump is composed of a 2,500 mm-long water channel of rectangular cross section with a width of 300 mm and a water depth of 100 mm and a vertical suction pipe with a 100 mm diameter installed at its downstream end with an offset of 10 mm from the centerline of the rectangular channel. At the upstream end of the channel, a uniform velocity of 0.37 m/s is given. LES with different wall boundary conditions have revealed that the origin of a submerged vortex is the mean shear of the approaching boundary layers that develop on the bottom and side walls of the pump sump. From detailed investigations of LES computed for a long time period of 16 seconds have revealed that deviation of the mean flow that approaches the suction pipe triggers conversion of the axis of the vorticity that was originally aligned to the lateral direction in the approaching boundary layers to that aligned to the vertical direction. The local acceleration of the vertical flow stretches the afore-mentioned vertical vortex, which results in formation of a submerged vortex. The separated flows downstream of the suction pipe generate vertical vorticity, and forms an air-entraining vortex when such a vortex is sucked into the suction pipe. Computations with a different bellmouth height and a different water-surface height have supported the above mentioned origin and formation mechanism of these vortices.</p>

    Other Link: https://ci.nii.ac.jp/naid/130007683177

display all >>

Awards 【 display / non-display

  • 日本機械学会論文賞

    2000.4    

  • 日本機械学会奨励賞(研究)

    1997.4    

 

Charge of on-campus class subject 【 display / non-display

  • 2021   ターボ機械特論

    Graduate school of Engineering Science

  • 2021   熱流体システム製作B

    Graduate school of Engineering Science

  • 2021   熱流体システム製作A

    Graduate school of Engineering Science

  • 2021   熱流体システム設計B

    Graduate school of Engineering Science

  • 2021   熱流体システム設計A

    Graduate school of Engineering Science

display all >>

 

Committee Memberships 【 display / non-display

  • 水力発電導入促進のための事業費補助金(水力発電実証モデル事業)採択審査委員会

    2020.4 - 2021.3  委員長

     More details

    Committee type:Other 

  • 水力発電導入促進のための事業費補助金(水力発電設備更新等事業)採択審査委員会

    2020.4 - 2021.3  委員長

     More details

    Committee type:Other 

  • 水力発電導入促進のための事業費補助金(水力発電事業性評価等支援事業)採択審査委員会

    2020.4 - 2021.3  委員

     More details

    Committee type:Other 

  • 水力発電導入促進のための事業費補助金(水力発電事業性評価等支援事業)採択審査委員会

    2019.4 - 2020.3  委員

     More details

    Committee type:Other 

  • 中小水力発電開発費等補助金(中小水力発電開発事業)採択審査委員会

    2019.4 - 2020.3  委員

     More details

    Committee type:Other 

display all >>