研究者業績

永岡 真

ナガオカ マコト  (Makoto Nagaoka)

基本情報

所属
大阪産業大学 工学部 交通機械工学科 教授

研究者番号
90394600
J-GLOBAL ID
202201010673897653
researchmap会員ID
R000035619

論文

 50
  • 永岡 真, 業天 祐治, 齋藤 崇志, 薮下 広高
    自動車技術会論文集 53(5) 904-909 2022年9月  査読有り筆頭著者責任著者
  • 業天 祐治, 薮下 広高, 永岡 真, 齋藤 崇志, 吉岡 雅也
    自動車技術会論文集 53(1) 114-118 2022年1月  査読有り
  • Hirotaka Yabushita, Makoto Nagaoka, Yuji Gyoten, Masaya Yoshioka, Yuichi Mori
    SAE International Journal of Advances and Current Practices in Mobility 4(2) 583-591 2021年9月21日  査読有り
  • Yoshihiro Nomura, Seiji Yamamoto, Makoto Nagaoka, Stephan Diel, Kenta Kurihara, Rio Shimizu, Eiji Murase
    INTERNATIONAL JOURNAL OF ENGINE RESEARCH 22(8) 2560-2574 2021年7月  査読有り責任著者
    A new predictive combustion model for a one-dimensional computational fluid dynamics tool in the multibody dynamics processes of gasoline engines was developed and validated. The model consists of (1) a turbulent burning velocity model featuring a flame radius-based transitional function, steady burning velocity that considers local quenching using the Karlovitz number and laminarization by turbulent Reynolds number, as well as turbulent flame thickness and its quenching model near the liner wall, and (2) a knock model featuring auto-ignition by the Livengood-Wu integration and ignition delay time obtained using a full-kinetic model. The proposed model and previous models were verified under a wide range of operating conditions using engines with widely different specifications. Good agreement was only obtained for combustion characteristics by the proposed model without requiring individual calibration of model constants. The model was also evaluated for utilization after prototyping. Improved accuracy, especially of ignition timing, was obtained after further calibration using a small amount of engine data. It was confirmed that the proposed model is highly accurate at the early stage of the engine development process, and is also applicable for engine calibration models that require higher accuracy.
  • 薮下 広高, 永岡 真, 吉岡 雅也, 森 雄一
    日本機械学会論文集 87(895) 20-00358-20-00358 2021年3月  査読有り
  • 森安 竜大, 上田 松栄, 池田 太郎, 永岡 真, 神保 智彦, 松永 彰生, 中村 俊洋
    計測自動制御学会論文集 55(3) 172-180 2019年3月  査読有り責任著者
  • 森安 竜大, 上田 松栄, 永岡 真, 池田 太郎, 西川 一明, 野尻 紗也香, 神保 智彦, 松永 彰生, 中村 俊洋
    自動車技術会論文集 49(6) 1162-1166 2018年11月  査読有り責任著者
    実機レスでの最適制御設計プロセスを目指し,機械学習を用いたディーゼルエンジン吸排気系制御を検討した.エンジンの詳細モデルから制御用順モデルを学習し,同モデルを用いたモデル予測制御をオフライン実行した結果から逆モデルを学習した.両モデルを用いた制御システムを構築し,目標値への追従能力を実験で検証した.
  • R. Moriyasu, M. Ueda, T. Ikeda, M. Nagaoka, T. Jimbo, A. Matsunaga, T. Nakamura
    IFAC-PapersOnLine 51(31) 542-548 2018年9月  査読有り責任著者
    This study investigated a control design method based on machine learning to achieve non-linear model predictive control (MPC) at a low computational load. In addition, we describe examples of the application of this method to a diesel engine air path system. The solution to the optimal control problem determined at each point in time by MPC depends on several parameters at that time. Thus, if the relationship between the solution and the parameters could be approximated in advance using machine learning, solving this problem online would become unnecessary, and the control computation time could be reduced. We designed a controller that operates the valves of the air path system using this method and used a simulation to verify that this resulted in a favorable tracking performance of the target values. The computation time of the approximated MPC controller was 0.022 ms.
  • 増田 糧, 佐山 勝悟, 冬頭 孝之, 永岡 真, 野口 泰, 杉浦 明光
    自動車技術会論文集 49(4) 732-738 2018年7月  査読有り責任著者
    火花点火エンジンの点火過程における,火花の伸長に伴う短絡現象,吹消え・再放電現象,および放電波形(電流・電圧)の予測モデルを構築し,3次元燃焼解析用火花点火モデルに組み込んだ.実機相当の温度・圧力・流速を再現する計測容器で検証した結果,火花挙動,放電波形および失火限界EGR率は計測データをよく再現した.
  • 河村 清美, 増田 糧, 植田 玲子, 井戸田 芳典, 永岡 真
    日本液体微粒化学会 微粒化 27(91) 43-49 2018年7月  査読有り責任著者
  • 森安 竜大, 松森 唯益, 永岡 真
    日本機械学会論文集 83(854) 17-00144-17-00144 2017年9月  査読有り責任著者
  • 長田 光広, 永岡 真
    日本機械学会論文集 82(838) 16-00073-16-00073 2016年6月  査読有り責任著者
  • Naoki Baba, Hiroaki Yoshida, Makoto Nagaoka, Chikaaki Okuda, Shigehiro Kawauchi
    Journal of Power Sources 252 214-228 2014年4月  査読有り責任著者
    To understand the thermal behavior of lithium-ion secondary batteries, distributed information related to local heat generation across the entire electrode plane, which is caused by the electrochemical reaction that results from lithium-ion intercalation or deintercalation, is required. To accomplish this, we first developed an enhanced single particle (ESP) model for lithium-ion batteries that provides a cost effective, timely, and accurate method for estimating the local heat generation rates without excessive computation costs. This model accounts for all the physical processes, including the solution phase limitation. Next, a two-way electrochemical-thermal coupled simulation method was established. In this method, the three dimensional (3D) thermal solver is coupled with the quasi-3D porous electrode solver that is applied to the unrolled plane of spirally wound electrodes, which allows both thermal and electrochemical behaviors to be reproduced simultaneously at every computational time-step. The quasi-3D porous electrode solver implements the ESP model. This two-way coupled simulation method was applied to a thermal behavior analysis of 18650-type lithium-ion cells where it was found that temperature estimates of the electrode interior and on the cell can wall obtained via the ESP model were in good agreement with actual experimental measurements. © 2013 Elsevier B.V. All rights reserved.
  • Hiroaki Yoshida, Makoto Nagaoka
    JOURNAL OF COMPUTATIONAL PHYSICS 257 884-900 2014年1月  査読有り責任著者
    A lattice Boltzmann method for simulating convection and diffusion using a curvilinear grid system is presented. The proposed method does not require an interpolation or coarse-graining procedure, and thus maintains the algorithmic simplicity of the original lattice Boltzmann scheme. The lattice Boltzmann scheme is based on uniformly distributed lattice points in a transformed coordinate system, and the apparent anisotropy of diffusion that arises due to the coordinate transformation is properly handled using the multiple-relaxation-time collision operator. An asymptotic analysis of the lattice Boltzmann equation shows that the proposed method appropriately reproduces the transformed convection-diffusion equation. Several specific problems are numerically analyzed in order to validate the proposed method, including an axially symmetric (two-dimensional) problem in which the diffusion flux at an oblate hemispheroid is simulated using a body-fitted orthogonal curvilinear grid system. (C) 2013 Elsevier Inc. All rights reserved.
  • 増田 糧, 河村 清美, 永岡 真, 溝渕 剛史, 鈴木 久雄
    日本液体微粒化学会 微粒化 22(76) 130-136 2013年11月  査読有り責任著者
  • 河村 清美, 増田 糧, 植田 玲子, 井戸田 芳典, 永岡 真, 増渕 匡彦, 小森 啓介
    日本機械学会論文集B編 78(793) 1598-1608 2012年9月  査読有り責任著者
  • 増田 糧, 河村 清美, 永岡 真, 増渕 匡彦, 小森 啓介
    日本機械学会論文集B編 78(793) 1584-1597 2012年9月  査読有り責任著者
  • H. Kosaka, Y. Nomura, M. Nagaoka, M. Inagaki, M. Kubota
    International Journal of Engine Research 12(4) 393-401 2011年6月  査読有り責任著者
    A novel combustion model for large-eddy simulation (LES) for gasoline engines has been developed. Unlike conventional models based on Reynolds-averaged Navier-Stokes (RANS) models, the new model takes a unique approach; it is described by the fractal characteristics of flame front and a universal expression for the subgrid scale (SGS) flame speed. The present fractal combustion model was applied to calculations of a spark ignition engine. Both the 0-10 per cent and 10-90 per cent combustion periods agree well with the experimental data. Because the modelling of the SGS turbulent speed is based on fractal analysis with experimental observations, the SGS combustion model is able to apply a wide range of engine operating conditions. The present model was applied to a multi-cycle simulation of a singlecylinder engine. The fluctuations at the instant when the heat release rate peaked were compared with data that was obtained experimentally. The calculated magnitude of the fluctuations was found to be close to the experimental values. It is thought that the flow variation generated during the intake stroke significantly influences the cyclic variations. Copyright © 2011 by institution of Mechanical Engineers.
  • 山本征治, 永岡真, 植田玲子, 脇坂佳史, 野田進
    日本燃焼学会誌 53(165) 2011年  査読有り責任著者
  • Hiroaki Yoshida, Makoto Nagaoka
    JOURNAL OF COMPUTATIONAL PHYSICS 229(20) 7774-7795 2010年10月  査読有り責任著者
    A lattice Boltzmann model with a multiple-relaxation-time (MRT) collision operator for the convection-diffusion equation is presented. The model uses seven discrete velocities in three dimensions (D3Q7 model). The off-diagonal components of the relaxation-time matrix, which originate from the rotation of the principal axes, enable us to take into account full anisotropy of diffusion. An asymptotic analysis of the model equation with boundary rules for the Dirichlet and Neumann-type (specified flux) conditions is carried out to show that the model is first- and second-order accurate in time and space, respectively. The results of the analysis are verified by several numerical examples. It is also shown numerically that the error of the MRT model is less sensitive to the variation of the relaxation-time coefficients than that of the classical BGK model. In addition, an alternative treatment for the Neumann-type boundary condition that improves the accuracy on a curved boundary is presented along with a numerical example of a spherical boundary. (C) 2010 Elsevier Inc. All rights reserved.
  • 小坂 英雅, 野村 佳洋, 永岡 真
    自動車技術会論文集 41(4) 827-832 2010年9月  査読有り責任著者
  • M. Inagaki, M. Nagaoka, N. Horinouchi, K. Suga
    International Journal of Engine Research 11(3) 229-241 2010年6月1日  査読有り
    Large eddy simulation (LES) using a mixed-time-scale (MTS) subgrid-scale (SGS) model is applied to the intake flows in simplified internal combustion engine geometry. A modified colocated grid system is employed to obtain results as precise as possible and to perform calculations in a stable way with a central difference scheme for convective terms. The results are compared with corresponding experimental data and the Reynolds averaged Navier-Stokes (RANS) equation model results obtained using the low-Reynolds-number linear k- In addition, it is made clear that when the QUICK scheme is used in LES for the convective terms instead of the central difference scheme, the result obtained deteriorates owing to the numerical viscosity. The importance of the discretization method in practical LES is also confirmed. © IMechE 2010.
  • S. Yamamoto, M. Nagaoka, R. Ueda, Y. Wakisaka, S. Noda
    International Journal of Engine Research 11(1) 17-27 2010年2月  査読有り責任著者
    A series calculation method from injector nozzle internal flow to in-cylinder combustion in diesel engines has been developed. In this study, the calculation results of in-cylinder pressure, heat release rate, and NO concentration are compared with experimental results for conventional combustion conditions as well as an advanced combustion condition, which combines a high exhaust gas recirculation (EGR) rate, high boost pressure, and high pressure injection. The calculated pressure and heat release rate histories are in reasonable agreement with those of experiments, but the NO concentration is underestimated especially on the higher EGR rate condition. Therefore, an investigation to improve the quantitative accuracy of NO concentration is performed. The probability density function (PDF) method is one way to estimate the accurate mean reaction rate containing the reaction rate fluctuation by turbulence. In this study, the PDF method only applied for NO calculation is developed to balance the calculation accuracy and the computational cost. The result shows that the reaction rate fluctuation, on NO formation, has a small effect on conventional combustion conditions, but increases with decreasing combustion temperature. © IMechE 2010.
  • 稲垣 昌英, 永岡 真, 堀之内 成明, 須賀 一彦
    日本機械学會論文集B編 73(725) 58-66 2007年1月25日  査読有り
  • K. Suga, M. Nagaoka, N. Horinouchi
    Journal of Heat Transfer 125(1) 200-203 2003年2月  査読有り
    A higher order version of the generalized gradient diffusion hypothesis (HOGGDH) for turbulent heat flux is applied to predict heat transfer in a square-sectioned U-bend duct. The flow field turbulence models coupled with are a cubic nonlinear eddy viscosity model and a full second moment closure. Both of them are low Reynolds number turbulence models. The benefits of using the HOGGDH heat flux model are presented through the comparison with the standard GGDH.
  • 永岡 真, 須賀 一彦, 堀之内 成明
    日本機械学会論文集B編 68(669) 1586-1592 2002年5月  査読有り筆頭著者責任著者
  • 須賀 一彦, 永岡 真, 堀之内 成明
    日本機械学會論文集. B編 68(666) 495-503 2002年2月25日  査読有り
  • Makoto Nagaoka, Kiyomi Kawamura
    SAE Transactions,JOURNAL OF ENGINES 110(3) 1326-1335 2002年1月  査読有り筆頭著者責任著者
  • K. Suga, M. Nagaoka, N. Horinouchi, K. Abe, Y. Kondo
    International Journal of Heat and Fluid Flow 22(3) 259-271 2001年6月  査読有り
    The three-equation cubic k-ε-A2 model proposed by Craft et al. (Int. J. Heat Fluid Flow 18 (1997) 15-28) is evaluated in three-dimensional (3-D) turbulent flows pertinent to engineering applications, especially in the automobile industry. For the computations of complex industrial flows, a numerical scheme has been developed using the cell vertex unstructured grid method. This scheme treats a mixture of tetrahedral, pyramidal, prismatic and hexahedral computational cells with high accuracy. The industrial flows chosen are internal combustion (IC) engine port-cylinder flows and flows around aerodynamic bluff bodies. The model performance in U-bend duct flows and a flow around a surface-mounted cubical obstacle is also examined. These fundamental flows include essential features of the industrial flows presently focused on. The model performs generally satisfactorily. However, the performance in a 3-D separating wake flow behind a bluff body suggests that the model needs further improvements. © 2001 Elsevier Science Inc. All rights reserved.
  • 永岡 真
    日本機械学会論文集. B編 66(647) 1885-1891 2000年7月25日  査読有り筆頭著者責任著者
  • Hiroshi Miyagawa, Makoto Nagaoka, Kazuhiro Akihama, Taketoshi Fujikawa
    SAE Transactions,JOURNAL OF FUELS AND LUBRICANTS 108(4) 2062-2071 2000年1月  査読有り
  • Hiroshi Miyagawa, Makoto Nagaoka, Katsuyuki Ohsawa, Toshio Yamada
    JSAE Review 19(4) 299-304 1998年10月1日  査読有り
    A multi-component droplet vaporization model for multi-dimensional calculation was studied in order to simulate the behavior of fuel droplets and mixture in a port injection gasoline engine. Calculation results for a single droplet show that the evaporation process of gasoline, which consists of more than 100 components, can be simulated using a model fuel composed of at least three representative species. Subsequently, three-dimensional calculations of flow and fuel spray for an actual engine intake port configuration were performed, using the developed multi-component vaporization model. It was shown that about 70% of the high-volatility component in injected gasoline flows into the cylinder, while about 70% of the low-volatility component stays in the intake port in the injected cycle. © 1998 Society of Automotive Engineers of Japan, Inc. and Elsevier Science B.V. All rights reserved.
  • Makoto Nagaoka, Katsuyuki Ohsawa, Brent Crary, Toshio Yamada, Shigeki Sugiura, Nobuo Imatake
    SAE Transactions,JOURNAL OF ENGINES 106(3) 1369-1376 1998年1月  査読有り筆頭著者
  • 永岡真, CRARY B, 大沢克幸, 山田敏生, 杉浦繁貴, 今竹信夫
    日本機械学会論文集 B編 63(611) 1997年  査読有り筆頭著者
  • 永岡 真, レイナルド ロナー
    日本機械学会論文集B編 63(605) 153-160 1997年1月  査読有り筆頭著者責任著者
  • 高田, 修, 中西, 広吉, 堀之内, 成明, 永岡, 真
    情報処理学会論文誌 37(9) 1666-1678 1996年9月15日  査読有り
    計算力学の分野では メッシュの質の良否が結果の精度や計算時間に大きく影響を及ぼすため 質の高いメッシュを生成することが重要な課題である. メッシュ生成には分野固有の経験や知識を必要とするため 知識処理によるアプローチが有効である. 我々は 流体解析や塑性変形解析などの計算力学の分野に適用できる構造格子による汎用的な2次元メッシュの自動生成システムを開発した. 本論文では 専門家のメッシュ生成過程のモデル化 その実現手法である推論方式 探索手法について述べる. また システムの評価のために 「自動車エンジンの吸気流解析」と「鍛造変形解析」の問題に適用し モデル化の妥当性および推論方式 探索手法の有用性を確認した. システムの特徴は以下のとおりである. (1)大成的な依存関係と局所的な依存関係を組み合わせた探索手法により 同時に複数の解を効率よく求めることができる (2)分野に依存しない標準的な手順(メタ・ルール)と分野固有の知識(ルール)を分離することにより 異なる分野への適用が容易である (3)複数の競合解消戦略を組み合わせた推論方式を用いることにより 複雑な処理の流れを的確に表現できる. The mesh generation is one of major tasks confronted in computational dynamics. The analysis accuracy and the computation cost depend directly on the generated mesh. Since various kinds of domain knowledge are needed in order to generate an acceptable mesh structure, the knowledge-based approach is effective. We have developed an expert system called GEN-MAI (Artificial Intelligence Mesh GENerator) for automatically generating two-dimensional meshes, which is easily applicable to various fields of computational dynamics with structured meshes. We analyzed some experienced mesh generation processes in computational fluid dynamics and plastic deformation analysis, and then could formulate these processes. From a viewpoint of this formulation, GENMAI was designed so as to be widely applicable to a large class of two-dimensional geometries. To check the validity of this formulation, we applied GENMAI to simulations of automotive engine intake flow analysis and plastic deformation analysis, and made the functionality of GENMAI clear. The characteristics of GENMAI are as follows: (1) Plural solutions can be efficiently obtained at the same time using global dependency and local dependency; and (2) The meta-level inference method and its knowledge representation are very applicable to various fields of analyses.
  • 永岡 真, 野村 奈緒美
    日本機械学会論文集. B編 61(587) 2744-2750 1995年7月25日  査読有り筆頭著者
  • Makoto Nagaoka, Hiromitsu Kawazoe, Naomi Nomura
    SAE Transactions,JOURNAL OF ENGINES 103(3) 878-896 1995年1月  査読有り筆頭著者
  • Makoto Nagaoka, Nariaki Horinouchi
    日本数値流体力学会, CFD Journal Vol.2(No.2) 169-180 1993年9月  査読有り筆頭著者
    圧縮性流れの解法において、非構造格子上で有限体積法による離散化と2次精度の空間差分スキームを用いる際、時間解法には前処理付きBi-CGSTAB法が当時一般的なRunge-Kutta法やガウスザイデル法に比べて定常解への収束が早くかつ安定であることを示した。
  • 高田 修, 中西 広吉, 堀之内 成明, 永岡 真
    情報処理学会研究報告知能と複雑系 (92号) 41-48 1992年11月  査読有り
  • 川添 博光, 永岡 真, 水田 準一, 大沢 克幸
    日本機械学会論文集 B編 58(547) p965-971 1992年3月  査読有り
  • Y. Tsujikawa, M. Nagaoka
    Journal of Engineering for Gas Turbines and Power 113(1) 100-105 1992年1月  査読有り
    This paper is devoted to the analyses and optimization of simple and sophisticated cycles, particularly for various gas turbine engines and aero-engines (including the scramjet engine) to achieve maximum performance. The optimization of such criteria as thermal efficiency, specific output, and total performance for gas turbine engines, and overall efficiency, nondimensional thrust, and specific impulse for aero-engines has been performed by the optimization procedure with the multiplier method. Comparison of results with analytical solutions establishes the validity of the optimization procedure.
  • 永岡 真, 大沢 克幸
    日本機械学会論文集B編 57(540) 2678-2683 1991年8月  査読有り筆頭著者
  • Kiyomi Nakakita, Makoto Nagaoka, Taketoshi Fujikawa, Katsuyuki Ohsawa, Shigeki Yamaguchi
    SAE Transactions,JOURNAL OF ENGINES,Part 2 99(3) 2132-2144 1991年1月  査読有り
  • Ichiro Sakata, Kazuyoshi Ishisaka, Hiromichi Yanagihara, Hiroshi Sami, Makoto Nagaoka, Katsuyuki Ohsawa
    SAE Transactions,JOURNAL OF ENGINES 99(3) 1488-1494 1991年1月  査読有り
  • 川添 博光, 永岡 真, 鈴木 繁雄, 大沢 克幸
    日本機械学会論文集 B編 57(533) p385-390 1991年1月  査読有り
  • 永岡真, 大沢克幸, 阪田一郎
    自動車技術会論文集 No.44 3-8 1990年3月  査読有り筆頭著者
    新開発の小型直噴ディーゼルエンジンにおける燃焼室内の流れと燃料噴霧衝突挙動を3次元シミュレーションで解析し、その燃焼室形状が乱れを強め、混合気形成を促進していることがわかった。
  • 中北 清己, 永岡 真, 大沢 克幸
    日本機械学会論文集 B編 56(521) p221-226 1990年1月  査読有り
  • 辻川 吉春, 沢田 照夫, 永岡 真, 塚本 祐二郎
    日本機械学会論文集 B編 53(493) p2915-2920 1987年9月  査読有り
  • 辻川 吉春, 沢田 照夫, 永岡 真, 塚本 祐二郎
    日本機械学会論文集 B編 53(491) p2219-2225 1987年7月  査読有り

MISC

 20
  • Hirotaka Iseki, Makoto Nagaoka, Shuntaro Yokoi, Naoto Horibe, Hiroshi Kawanabe
    SAE Technical Papers 2021-01-0603 (2021) 2021年4月  査読有り
    For the measurements of flow rate, pressure and/or temperature in an engine exhaust pipe, probes are often inserted into the exhaust pipe depending on the application. These measurement probes differ a lot in terms of their size and shape. The flow around the probes become further complicated due to the pulsation of engine exhaust flow. In this study, computational fluid dynamics (CFD) simulations were carried out and a zero-dimensional (0D) model was constructed to analyze the flow field around the probe and flow rate of a pulsating flow. The simulations and the measurements of the flow rate and pressure were performed on flows around a hexagonal prism inserted in a circular pipe which is intended to be a differential pressure flow meter. The velocity field was also measured using the particle image velocimetry (PIV) technique. The CFD simulation results were validated with the experiments for both steady and pulsating flows. In the 0D model for pulsating flow, the flow acceleration as well as pipe friction and prism drag losses were taken into account. The flow rates calculated using the model agreed well with the CFD simulation results. The relationship between the flow rate and the pressure was analyzed using the CFD and the 0D model. In the low flow rate and low pressure difference period, the relationship between the flow rate and the square root of pressure difference deviated from linear and exhibited hysteresis due to the flow acceleration. The cycle-averaged flow rates calculated using the 0D model were closer to those by the CFD simulations than those of a conventional steady flow correlation.
  • Ryo Masuda, Shogo Sayama, Takayuki Fuyuto, Makoto Nagaoka, Akimitsu Sugiura, Yasushi Noguchi
    SAE Technical Papers 2018-01-1727 2018年9月  査読有り
    This report describes the implementation of the spark channel short circuit and blow-out submodels, which were described in the previous report, into a spark ignition model. The spark channel which is modeled by a particle series is elongated by moving individual spark particles along local gas flows. The equation of the spark channel resistance developed by Kim et al. is modified in order to describe the behavior of the current and the voltage in high flow velocity conditions and implemented into the electrical circuit model of the electrical inductive system of the spark plug. Input parameters of the circuit model are the following: initial discharge energy, inductance, internal resistance and capacitance of the spark plug, and the spark channel length obtained by the spark channel model. The instantaneous discharge current and the voltage are obtained as outputs of the circuit model. When two arbitrary spark particles of the spark channel get close, the short circuit occurs if the electric potential differences between the two locations exceed a certain threshold voltage, which is raised with increasing distance between the two particles and decreasing discharge current. When the current falls below a lower limit current for maintenance of discharge, the spark blow-out occurs. A new spark channel is formed if the secondary circuit has the remaining energy which can break the electrical insulation between electrodes. Each line element of the spark channel particles heats and ignites the surrounding mixture gas. The turbulent flame speed and extinction are considered in the flame kernel behavior. The behavior of the spark channel, the current and voltage of the secondary circuit, and the ignition limit due to in-creases in the EGR rate were consistent with data measured from the spark ignition process in a combustion chamber.
  • Mitsuhiro Nagata, Makoto Nagaoka
    Proc. 10th International Symposium on Turbulence and Shear Flow Phenomena (TSFP10) 2017年10月  査読有り
  • Ryo Masuda, Kiyomi Kawamura, Makoto Nagaoka
    R&D Review of Toyota CRDL Vol.45(No.3) 73-75 2014年9月  
  • Makoto Nagaoka, Reiko Ueda, Ryo Masuda, Eberhard von Berg, Reinhard Tatschl
    R&D Review of Toyota CRDL Vol.42(No.2) 73-84 2011年6月  

講演・口頭発表等

 1

所属学協会

 3

産業財産権

 13

研究テーマ

 2
  • 研究テーマ
    自動車の内燃機関・パワートレイン要素のサロゲートモデルの研究
    研究期間(開始)
    2015
  • 研究テーマ
    カーボンニュートラル燃料/再生可能エネルギーの利活用に向けた燃料挙動の解析とモデリング
    研究期間(開始)
    2022