ISHINO Yojiro

写真a

Affiliation Department etc.

Department of Electrical and Mechanical Engineering
Department of Electrical and Mechanical Engineering

Title

Professor

Mail Address

E-mail address

Graduating School

  •  
    -
    1987.03

    Nagoya Institute of Technology   Faculty of Engineering   Graduated

Graduate School

  •  
    -
    1992.03

    Nagoya Institute of Technology  Graduate School, Division of Engineering  Doctor's Course  Completed

Degree

  • Nagoya Institute of Technology -  Master (Engineering)

  • Nagoya Institute of Technology -  Doctor (Engineering)

External Career

  • 1993.12
    -
    1994.11

    Leeds university   Dept. of Mechanical Engineering   Researcher  

Academic Society Affiliations

  • 1990.04
    -
    Now

    Combustion Society of Japan

  • 1989.01
    -
    Now

    The Heat Transfer Society of Japan

  • 2003.01
    -
    Now

    The Robotics Society of Japan

  • 2008.08
    -
    Now

    American Institute of Aeronautics and Astronautics

  • 1990.04
    -
    Now

    The Combustion Institute

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Field of expertise (Grants-in-aid for Scientific Research classification)

  • Thermal engineering

  • Fluid engineering

  • Energy engineering

  • Environmental engineering and reduction of environmental burden

  • Measurement engineering

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Research Career

  • Study onImprovement of Pulse Combustors and regenerative ceramic burners

    (not selected)  

    Project Year:   - 

  • Two Dimensional Measurement of Combustion Field

    (not selected)  

    Project Year:   - 

  • Acoustic Control of Combustion

    (not selected)  

    Project Year:   - 

Papers

  • 3D Printing of Spark-Ignited Flame Kernels, Experimentally Captured by 3D-Computer Tomography and Multi-Directional Schlieren Photography

    Yojiro Ishino, Naoki Hayashi, Yuta Ishiko, Kimihiro Nagase, Kazuma Kakimoto, Ahmad Zaid Nazari, Yu Saiki

    J. Heat Transfer, Transaction of the ASME ( American Society of Mechanical Engineers )    2017.02  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

    Non-scanning 3D-CT(Computer Tomography) technique employing a multi-directional quantitative schlieren photographic system with flash light source, has been performed to obtain instantaneous density distributions of spark-ignited laminar / turbulent flame kernels. For simultaneous schlieren photography, the custom-made 20-directional schlieren camera was constructed and used. The flame kernels are made by spark ignition for a fuel-rich propane-air premixed gas (flow velocity :1.0 m/s, equivalence ratio :1.4 ). Spark electrodes of 0.4 mm diameter with 1.0 mm gap are used. First, development of laminar flame kernel is indicated in the 1st row high-speed image of top right. 3D printed model of the CT reconstruction result show the spherical shape of flame kernel with a pair of deep wrinkles. The wrinkle is considered to be caused by spark electrodes. Next turbulent flame kernel behind turbulence promoting grid is selected (trubulence intensity 0.26 m/s). Second row high-speed images of top-right show corrugated flame shape. 3D model of CT result expresses the instantaneous 3D turbulent flame kernel shapes. These 3D solid models are 3D-printed as 2 times large size for threshold density level of 0.7 kg/m3.

  • Manipulation of Large-Scale Vortical Structures and Mixing in a Coaxial Jet with Miniature Jet Actuators Toward Active Combustion Control

    Yu Saiki, Shigehiro Tanaka, Shunnya Hattori, Kasumi Nakura, Yojiro Ishino

    Flow Turbulence and Combustion ( Springer )    2016.11  [Refereed]

    Research paper (scientific journal)   Multiple Authorship

  • Schlieren 3D-CT Measurement of Instantaneous Density Distributions of the Shock-cell Structure of Under-expanded Supersonic Micro-jet

    Ahmad Zaid NAZARI, Yojiro ISHINO, Yuta ISHIKO, Yoshiaki MIYAZATO, Shinichiro NAKAO

    Prodeedings of 2016 Asia-Pacific International Symposium on Aerospace Technology     1 - 9   2016.10  [Refereed]

    Research paper (international conference proceedings)   Multiple Authorship

    Measurement of instantaneous density distribution of the shock-cell structure of an underexpanded supersonic microjet escaping into an ambient space from an axisymmetric convergent-divergent (Laval) micro nozzle has been conducted. For 3D observation of supersonic microjet, non-scanning 3D-CT technique using a multi-directional quantitative schlieren system with flash light source is employed. In this technique, for simultaneous schlieren photography, the custom-made 20-directional schlieren camera has been constructed and used. This study examines underexpanded supersonic jet from a micro nozzle with nozzle pressure ratio (NPR) 5.0 and plenum chamber pressure (stagnation pressure) 0.505 MPa. This micro nozzle design Mach number is Md = 1.5 and has circular cross-section with an exit diameter of 1000μm. First, the report deals with the density distribution. The density contour plot data of the jet flow is obtained by 3D-CT (Three Dimensional Computer Tomography) reconstruction of the images by MLEM an appropriate CT algorithm. Next, the density distribution data is calculated by formula. Theoretical results based on the theory of Tam (1984) are found to compare favorably with experimental measurement. The measured and calculated results are in acceptable agreement.

  • Development and Fundamental Study on a Novel Rotational Internal Combustion Engine with a Single-Lobe Peritrochoid Rotor

    Yojiro Ishino, Yu Sakai, Tomoya Niwa, Masato Kumano

    Prodeedings of 2016 Asia-Pacific International Symposium on Aerospace Technology     1 - 12   2016.10  [Refereed]

    Research paper (international conference proceedings)   Multiple Authorship

    A novel rotational internal combustion engine is invented and investigated for APU(Auxiliary power unit) of aircrafts and range-extender-power-unit for electric automobiles. For the applications, IC engines are required vibration-free characteristics. In the present engine, no reciprocating component is used, resulting in vibration-free operation. This engine mainly consists of a rotor casing, a rotor and a crank shaft. The rotor shapes as single lobe peritrochoid (S.L.P.) curve. The rotor rotates by the crank shaft of eccentricity e and rotates itself in counter-direction by phasing gears. The rotor casing shape having two cavities is defined as envelope curve of the rotating single-lobe peritrochoid rotor. The room between the rotor and casing performs the working processes for working gas; intake, compression, ignition, expansion and exhaust processes. The intake of premixed gas of air and fuel and exhaust of burnt gas are controlled by rotary valves installed on the combustion recesses of the rotor-casing. The combustion recesses are equipped with spark-electrodes for ignition. One of advantages of this engine compared with Wankel rotary engines and a previous engine invented by authors, is easy and reliable sealing of working gas. In this engine configuration, that is, a sealing component is only installed on waist section of rotor-casing, instead of complex sealing system on a rotor in case of Wankel engines, resulting in high efficiency by low-leakage of working gas.
    In this paper, first, configuration and geometries of this engine are described. Next the prototype engine is introduced and the cyclic behavior of the working process of this prototype engine is explained. Performance of the prototype engine driven by an electric motor is also shown.

  • Rainbow Schlieren Measurements in Underexpanded Jets from Axisymmetric

    Hikaru FUKUDA, Hiroaki MAEDA, Daisuke ONO,Shinichiro NAKAO, Yoshiaki MIYAZATO, Yojiro ISHINO

    Proceedings of The 27th International Symposium on Transport Phenomena(ISTP-27)   ISTP27 ( 158 ) 1 - 7   2016.09  [Refereed]

    Research paper (international conference proceedings)   Multiple Authorship

    The rainbow schlieren deflectometry is applied for the slightly underexpanded jet issued from an axisymmetric supersonic micro nozzle with a design Mach number of 1.5. The nozzle was designed by the axisymmetric method of characteristics to provide uniform and parallel flow at the nozzle exit and it has inner diameters of 922 m and 1000 m at the nozzle throat and the exit, respectively, and a longitudinal length of 1300 m from throat to exit. The experiment was performed at a nozzle pressure ratio of 4.0 and a throat Reynolds number of 5.84 x 104. The jet density field is reconstructed by the image analysis based upon the Abel inversion of experimental data. The density contour map on the cross-section including the jet centerline is displayed to observe the gross features of micro supersonic jets. The vortex-sheet model on the shock cell structure proposed by Tam is used for a quantitative comparison between experiment and theory.

  • Schlieren 3D-CT Reconstruction of Instantaneous Ddensity Distributions of Spark-Ignited Flame Kerness of Fuel-Rich Propane-Air Premixture

    Yojiro Ishino, Naoki Hayashi, Yuta Ishiko, Ahmad Zaid Nazari

    Proceedings of the ASME 2016 Summer Heat Transfer Conference ( ASME )  HT2016   7423   2016.07  [Refereed]

    Research paper (international conference proceedings)   Single Author

    For 3D observation of high speed flames, non-scanning 3D-CT technique using a multi-directional quantitative schlieren system with flash light source, is proposed for instantaneous density distribution of unsteady premixed flames. This "Schlieren 3D-CT" is based on (i)simultaneous acquisition of flash-light schlieren images taken from numerous directions, and (ii) 3D-CT reconstruction of the images by an appropriate CT algorithm. In this technique, for simultaneous schlieren photography, the custom-made 20-directional schlieren camera has been constructed and used. This camera consists of 20 optical systems of single-directional quantitative schlieren system. Each system is composed of two convex achromatic lenses of 50 mm in diameter and 300 mm in focal length, a light source unit, a schlieren stop of a vertical knife edge and a digital camera. The light unit has a flash (9 micro-sec duration) light source of a uniform luminance rectangular area of 1 mm x 1 mm. Both of the uniformity of the luminosity and the definite shape are essential for a quantitative schlieren observation. Sensitivity of the digital cameras are calibrated with a stepped neutral density filter. Target flames are located at the center of the camera. The image set of 20 directional schlieren images are processed as follows. First the schlieren picture brightness is shifted by no-flame-schlieren picture brightness in order to obtain the real schlieren brightness images. Second, brightness of these images is scaled by Gladstone-Dale constant of air. Finally, the scaled brightness is horizontally integrated to form "density thickness images", which can be used for CT reconstruction of density distribution. The density thickness images are used for CT reconstruction by MLEM (maximum likelihood-expectation maximization) CT-algorithm to obtain the 3D reconstruction of instantaneous density distribution. In this investigation, the "density thickness" projection images of 400(H) x 500(V) pixel (32.0 mm x 40.0 mm) are used for 3D-CT reconstruction to produce 3D data of 400(x) x 400(y) x 500(z) pixel (32.0 mm x 32.0 mm x 40.0 mm). The voxel size is 0.08 mm each direction. In this investigation, the target flame is spark-ignited flame kernels. The flame kernels are made by spark ignition for a fuel-rich propane-air premixed gas. First, laminar flow is selected as the premixed gas flow to establish the spherically expanding laminar flame. The CT reconstruction result show the spherical shape of flame kernel with a pair of deep wrinkles. The wrinkle is considered to be caused by spark electrodes. Next turbulent flows behind turbulence promoting grid is selected. The corrugated shape flame kernel is obtained. The schlieren 3D-CT measurements are made for the complicated kernels. CT results expresses the instantaneous 3D turbulent flame kernel shapes.

  • 3D-CT(Computer Tomography) Measurement of an Instantaneous Density Distribution of Turbulent Flames with a Multi-directional Quantitative Schlieren Camera (Reconstructions of High-speed Premixed Burner Flames with Different Flow Velocities)

    Yojiro Ishino, Naoki Hayashi, Ili Fatimah Bt Abd Razak, Takahiro Kato, Yudai Kurimoto, Yu Saiki

    Flow, Turbulence and Combustion   96 ( 3 ) 819 - 835   2016.04  [Refereed]  [Invited]

    Research paper (scientific journal)   Multiple Authorship

    In order to provide a suitable technique for 3D observation of high speed turbulent flames, non-scanning 3D-CT(Computer Tomography) technique using a multi-directional quantitative schlieren system with flash light source, is proposed for instantaneous density distribution of unsteady premixed flames. This "schlieren 3D-CT" is based on (i)simultaneous acquisition of flash-light schlieren images taken from numerous directions, and (ii) 3D-CT reconstruction of the images by an appropriate CT algorithm. In this paper, first, as a preliminary research, 3D-CT reconstruction of non-axisymmetric steady flame is made with a single-directional quantitative schlieren system. Next, with custom-made 20 directional schlieren camera, instantaneous density distributions of a high-speed turbulent flames of nozzle exit velocities of 8.0 and 10.0 m/s has been CT-reconstructed. The 3D-views of the reconstructed flame front shape clearly give the information of the flame structure with fine scale corrugations. Based on the distributions, area-enlargement rates of the flame front area are derived, and investigated.

  • 3D Printing of Instantaneous Turbulent Flame Shapes, Experimentally Captured by 3D-Computer Tomography and Multi-Directional Schlieren Photography

    Yojiro Ishino, Naoki Hayashi, Yuta Ishiko, Ili Fatimah Bt Abd Razak, Yu Saiki, Kimihiro Nagase, Kazuma Kakimoto

    Transactions of ASME, J. Heat Transfer ( American Society of Mechanical Engineeres )  138 ( 2 ) 020912-1   2016.02  [Refereed]  [Invited]

    Research paper (scientific journal)   Multiple Authorship

    Non-scanning 3D-CT(Computer Tomography) technique employing a multi-directional quantitative schlieren photographic system(top-left picture) with flash light source, has been performed to obtain instantaneous density distributions of high-speed turbulent flames(for reference, the target flame of 8 m/s exit velocity is indicated in the right-top picture). For simultaneous schlieren photography, the custom-made 20-directional schlieren camera was constructed and used. The target turbulent flame is high-speed flames, anchored on the burner of a nozzle exit of 4.2 mm diameter. The image set of 20 directional schlieren images are processed by MLEM CT-algorithm to obtain the 3D reconstruction of instantaneous density distribution. The solid models(bottom picture) of threshold density level of 0.7 kg/m3 are 3D-printed as 4 times large size for detail observations. The average exit velocity of the propane-air mixture of equivalence ratio of 1.1 is set to be 10, 8, 6 and 4 m/s (models from left to right in the bottom picture). The solid models show the complicated shape of the high speed turbulent flames. The flame structure of higher speed flame has fine scale corrugations. This corresponds to the “corrugated flamelets regime” of the Borghi & Peters diagram well.

  • Manipulation of large-scale vortical structures and mixing in a coaxial jet with miniature jet actuators

    Y. Saiki, S. Tanaka, S. Hattori, K. Nakura, Yojiro Ishino

    8th International Symposium on Turbulence, Heat and Mass Transfer (THMT'15)     2015.09  [Refereed]

    Research paper (international conference proceedings)   Multiple Authorship

  • 3D-CT Measurement of Instantaneous Density Distributions of High-Speed Premixed Turbulent Burner Flames with a Multi-Directional Schlieren Camera (Effects of Flow Velocity on 3D Flame Front Shape)

    Yojiro Ishino, Naoki Hayashi, Ili Fatimah Bt Abd Razak, Yu Saiki

    Proceedings of the 1st Thermal and Fluid Engineering Summer Conference, American Society of Thermal and Fluids Engineering   TFESC ( 12970 ) 1 - 11   2015.08  [Refereed]

    Research paper (international conference proceedings)   Multiple Authorship

    In present study, in order to provide a suitable technique for 3D observation of high speed turbulent flames, non-scanning 3D-CT technique using a multi-directional quantitative schlieren system with flash light source, is proposed for instantaneous density distribution of unsteady premixed flames. This "Schlieren 3D-CT" is based on (i)simultaneous acquisition of flash-light schlieren images taken from numerous directions, and (ii) 3D-CT reconstruction of the images by an appropriate CT algorithm. For simultaneous schlieren photography, in this experiment, the custom-made 20-directional schlieren camera has been constructed and used. Target flames are located at the center of the camera. The image set of 20 directional schlieren images are processed by MLEM CT-algorithm to obtain the 3D reconstruction of instantaneous density distribution. In this investigation, the target turbulent flame is high-speed burner flames. The burner has a nozzle exit of 4.2 mm diameter. The average flow velocity of the propane-air mixture of equivalence ratio of 1.1 is set to be 4, 6, 8 and 10 m/s. The burner is equipped with a turbulence promoting orifice in the burner tube. In order to anchor the high-speed flame on the burner nozzle, the burner tip has 4 holes for introducing the pilot flames. Results of the 3D-reconstructions indicates that the distributions show the complicated shape of the high speed turbulent flames. It is also found that the flame structure of higher speed flame has fine scale corrugations. This corresponds to the "corrugated flamelets regime" of the Borghi & Peters diagram for premixed turbulent combustion well.

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Review Papers

  • Instantaneous 3D-CT(Computer Tomography) measurements with instantaneous multi-directional photography for unsteady flame/flow phenomena; and 3D printing of 3D reconstructed distributions

    Yojiro Ishino

        1 - 13   2016.11  [Invited]

    Introduction and explanation (others)   Single Author

  • 3D Visualization of unsteady flames by the combined technique of multi-directional simultaneous photography and 3D-Computed Tomography

    Yojiro ISHINO, Yu SAIKI, Yasufumi TOMIDAI, Yuya OKITA

      31 ( 120 ) 9 - 14   2011.01

    Introduction and explanation (international conference proceedings)   Multiple Authorship

Presentations

  • Schlieren 3D-CT Measurement of Instantaneous Density Distributions of the Shock-cell Structure of Under-expanded Supersonic Micro-jet

    Ahmad Zaid NAZARI, Yojiro ISHINO, Yuta ISHIKO, Yoshiaki MIYAZATO, Shinichiro NAKAO

    2016 Asia-Pacific International Symposium on Aerospace Technology  (富山国際会議場)  2016.10  -  2016.10  The Japan Society of Aeronautical and Space Sciences

  • Development and Fundamental Study on a Novel Rotational Internal Combustion Engine with a Single-Lobe Peritrochoid Rotor

    Yojiro Ishino, Yu Sakai, Tomoya Niwa, Masato Kumano

    2016 Asia-Pacific International Symposium on Aerospace Technology  (富山国際会議場)  2016.10  -  2016.10  The Japan Society of Aeronautical and Space Sciences

  • Combustion Characteristics of Active Controlled Biogas Flames with Miniature Actuators

    Masahiro KURODA, Takuma AKAO, Yu SAIKI, Yojiro ISHINO

    2016.10  -  2016.10 

  • Schlieren 3D-CT Measuremsnt of Instantaneous Density Distributions of the Shock-cell Structure of Under-Expanded Supersonic Jets

    Ahmad Zaid NAZARI, Naoki HAYASHI, Yuta ISHIKO, Kimihiro NAGASE, Kazuma KAKIMOTO, Yojiro ISHINO, Yoshiaki MIYAZATO, Shinichiro NAKAO

    2016.09  -  2016.09 

  • Instantaneous 3D-CT(Computer Tomography) measurements with instantaneous multi-directional photography for unsteady flame/flow phenomena; and 3D printing of 3D reconstructed distributions

    Yojiro ISHINO  [Invited]

    2016.09  -  2016.09 

  • 3D Printing of Spark-Ignited Flame Kernels, Experimentally Captured by 3D-Computer Tomography and Multi-Directional Schlieren Photography

    Yojiro Ishino, Naoki Hayashi, Yuta Ishiko, Kimihiro Nagase, Kazuma Kakimoto, Ahmad Zaid Nazari, Yu Saiki  [Invited]

    ASME 2016 Summer Heat Transfer Conference  (Washington DC)  2016.07  -  2016.07  American Society of Mechanical Engineeres

  • Schlieren 3D-CT Reconstruction of Instantaneous Ddensity Distributions of Spark-Ignited Flame Kerness of Fuel-Rich Propane-Air Premixture

    Yojiro Ishino, Naoki Hayashi, Yuta Ishiko, Ahmad Zaid Nazari, Kimihiro Nagase, Kazuma Kakimoto, Yu Saiki

    ASME 2016 Summer Heat Transfer Conference  (Washington DC)  2016.07  -  2016.07  American Society of Mechanical Engineeres

  • Study on a Novel Rotational Internal Combustion Engine with a S.L.P. Rotor

    Yojiro ISHINO, Yu SAKAI, Tomoya NIWA

    2016.06  -  2016.07 

  • Study on Micro-Flame Array Burner for a Gas Cooking Stove Adapted to Finned Heating Surface

    Ryota TOYAMA, Yasuyuki KONDO, Yojiro ISHINO

    2016.06  -  2016.07 

  • Fundamental Configuration and Characteristics of a Novel Rotational Internal Combustion Engine with a S.L.P. Rotor

    Yojiro ISHINO, Yu SAKAI, Tomoya NIWA

    2016.06  -  2016.06 

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Industrial Property

  • Novel Rotational Engine and Compressor without Eccentric nor Reciprocating Motion

    特願 特願2012057992 

    Novel Rotational Engine and Compressor without Eccentric nor Reciprocating Motion

 
 

Academic Activity

  • 2015.04
    -
    Now

    Japan Society for Design Engineering