Presentations -
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Study of Fee Jets from Axisymmetric Supersonic Micro Nozzles (Part 2, RANS Simulation) International conference
Hikaru Fukuda, Shinichiro Nakao, Yoshiaki Miyazato, Yojiro Ishino
14th International Conference on Flow Dynamics
Event date： 2017.11
Language：English Presentation type：Oral presentation (general)
Venue：Sendai
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無振動回転式SLPエンジンの発明・開発・改良
石野洋二郎，丹羽智哉，杉浦秀隆，大沼燦汰，齋木悠
名工大テクノフェア 名古屋工業大学
Event date： 2017.11
Language：Japanese Presentation type：Poster presentation
Venue：名古屋工業大学
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CFRP（炭素繊維強化プラスチック）の燃焼廃棄処理と燃焼加工法に関する研究
石野洋二郎，當山良太，田畑まどか，齋木悠
名工大テクノフェア 名古屋工業大学
Event date： 2017.11
Language：Japanese Presentation type：Poster presentation
Venue：名古屋工業大学
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THREE-DIMENSIONAL FLAME STRUCTURE AND CHARACTERISTICS International conference
Y. Kato, T. Hirasawa, Z. Diao, M. Winter, Y. Ishino
the Ninth JSME-KSME Thermal and Fluids Engineering Conference 日本機械学会，韓国機械学会
Event date： 2017.10
Language：English Presentation type：Oral presentation (general)
Venue：沖縄コンベンションセンター
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SCHLIEREN CT MEASUREMENT OF 3D DENSITY DISTRIBUTIONS OF PERFECTLY AND IMPERFECTLY EXPANDED SUPERSONIC MICRO-JETS FROM CIRCULAR AND RECTANGULAR MICRO NOZZLES International conference
A. Z. Nazari, Y. Ishino1, Y. Ishiko, T. Motohiro, R. Yamada, Y. Saiki, Y. Miyazato, S. Nakao
The Ninth JSME-KSME Thermal and Fluids Engineering Confference(TFEC9) 日本機械学会，韓国機械学会
Event date： 2017.10
Language：English Presentation type：Oral presentation (general)
Venue：沖縄コンベンションセンター
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Schlieren 3D-CT Measuremsnt of Instantaneous Density Distributions of the Fuel Jets and Flame Kernel in a Direct-Injection Engine Model and Supersonic Jets Invited
Event date： 2017.09
Language：English Presentation type：Oral presentation (general)
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THREE-DIMENSIONAL FLAME STRUCTURE AND CHARACTERISTICS OF HEATING PARTICLES IN METHANE CLUSTERED MICROFLAMES ON SIX FUEL AND ONE AIR JETS
Y. Kato, T. Hirasawa, Z. Diao, M. Winter, Y. Ishino
第26回日本エネルギー学会大会 日本エネルギー学会
Event date： 2017.08
Language：Japanese Presentation type：Poster presentation
Venue：名古屋
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Study on CFRP(Carbon Fiber Reinforced Plastic) Combustion for Incineration(Observations of Combustion Processes of Test Pieces of CFRP)
Event date： 2017.07
Language：Japanese Presentation type：Oral presentation (general)
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Schlieren 3D-CT Measurement of Instantaneous Density Distributions of Fuel Jet and Flame Kernel in a Direct-Injection Engine Model
Event date： 2017.07
Language：Japanese Presentation type：Oral presentation (general)
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SLPローターエンジンの構造と作動特性
石野 洋二郎，丹羽 智哉，酒井 悠，熊野 聖人
第27回内燃機関シンポジウム 日本機械学会，自動車技術会
Event date： 2016.12
Language：Japanese Presentation type：Oral presentation (general)
Venue：東京工業大学，蔵前会館
本研究では，従来のWankel式ロータリーエンジンやピストンエンジンと異なり，主なシール機構がケーシング上に固定され，より確実に作動流体のシールを行うことができ，低振動である回転式エンジン「S.L.P (Single Lobe Peritrochoid：単葉ペリトロコイド)ローター・エンジン」を新たに考案した．本報では，エンジンの基本構成，作動原理，試作エンジンの構造，モーター駆動時における火炎伝播過程を報告する．
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無振動回転式エンジン(SLPエンジン，日の丸エンジン)の発明
石野 洋二郎，丹羽 智哉，熊野 聖人
名工大・名市大合同テクノフェア 名古屋工業大学
Event date： 2016.11
Language：Japanese Presentation type：Oral presentation (general)
Venue：名古屋工業大学
容積型の回転式エンジンは，その低振動性から，電気自動車用の航続距離延長用発電機や非常用発電機などの用途に適するため，将来的にも需要が期待される．先行研究では，高度な低振動性を求め，純粋回転のみで作動する2ローター式の回転式エンジンを考案し，試作機による実機試験を行った．その結果，作動流体のシール性の向上が課題として挙げられた．そこで本研究では，従来のWankel式ロータリーエンジンやピストンエンジンと異なり，主なシール機構がケーシング上に固定され，より確実に作動流体のシールを行うことのできる回転式エンジン「S.L.P (Single Lobe Peritrochoid：単葉ペリトロコイド)ローター・エンジン」を新たに発明した．発表では，エンジンの基本構成，作動原理，試作エンジンの構造，燃焼過程について，報告する．
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Schlieren 3D-CT Measurement of Instantaneous Density Distributions of the Shock-cell Structure of Under-expanded Supersonic Micro-jet International conference
Ahmad Zaid NAZARI, Yojiro ISHINO, Yuta ISHIKO, Yoshiaki MIYAZATO, Shinichiro NAKAO
2016 Asia-Pacific International Symposium on Aerospace Technology The Japan Society of Aeronautical and Space Sciences
Event date： 2016.10
Language：English Presentation type：Oral presentation (general)
Venue：富山国際会議場
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.
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Development and Fundamental Study on a Novel Rotational Internal Combustion Engine with a Single-Lobe Peritrochoid Rotor International conference
Yojiro Ishino, Yu Sakai, Tomoya Niwa, Masato Kumano
2016 Asia-Pacific International Symposium on Aerospace Technology The Japan Society of Aeronautical and Space Sciences
Event date： 2016.10
Language：English Presentation type：Oral presentation (general)
Venue：富山国際会議場
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. -
Combustion Characteristics of Active Controlled Biogas Flames with Miniature Actuators
Masahiro KURODA, Takuma AKAO, Yu SAIKI, Yojiro ISHINO
Event date： 2016.10
Language：Japanese Presentation type：Oral presentation (general)
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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
Event date： 2016.09
Language：Japanese Presentation type：Oral presentation (general)
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Instantaneous 3D-CT(Computer Tomography) measurements with instantaneous multi-directional photography for unsteady flame/flow phenomena; and 3D printing of 3D reconstructed distributions Invited
Yojiro ISHINO
Event date： 2016.09
Language：Japanese Presentation type：Oral presentation (general)
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新型回転式無振動内燃エンジン「日の丸エンジン」の開発
石野 洋二郎，丹羽 智哉，熊野 聖人
イノベーション・ジャパン2016‐大学見本市 新エネルギー・産業技術総合開発機構（NEDO），科学技術振興機構（JST）
Event date： 2016.08
Language：Japanese Presentation type：Poster presentation
Venue：東京ビッグサイト
現在の主流の往復運動のピストンエンジンは，無振動化が困難である．本発明の無振動回転エンジン「日の丸エンジン」は，より単純な単葉ペリトロコイドローター（準円形）と２凹部のケーシングにより構成される最も単純な構造のエンジンである．
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3D Printing of Spark-Ignited Flame Kernels, Experimentally Captured by 3D-Computer Tomography and Multi-Directional Schlieren Photography Invited International conference
Yojiro Ishino, Naoki Hayashi, Yuta Ishiko, Kimihiro Nagase, Kazuma Kakimoto, Ahmad Zaid Nazari, Yu Saiki
ASME 2016 Summer Heat Transfer Conference American Society of Mechanical Engineeres
Event date： 2016.07
Language：English Presentation type：Oral presentation (general)
Venue：Washington DC
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.
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Schlieren 3D-CT Reconstruction of Instantaneous Ddensity Distributions of Spark-Ignited Flame Kerness of Fuel-Rich Propane-Air Premixture International conference
Yojiro Ishino, Naoki Hayashi, Yuta Ishiko, Ahmad Zaid Nazari, Kimihiro Nagase, Kazuma Kakimoto, Yu Saiki
ASME 2016 Summer Heat Transfer Conference American Society of Mechanical Engineeres
Event date： 2016.07
Language：English Presentation type：Oral presentation (general)
Venue：Washington DC
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.
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Study on a Novel Rotational Internal Combustion Engine with a S.L.P. Rotor
Yojiro ISHINO, Yu SAKAI, Tomoya NIWA
Event date： 2016.06 - 2016.07
Language：Japanese Presentation type：Oral presentation (general)
