Dept. of Interdisciplinary Space Science

高木 亮治

タカキ リョウジ  (Ryoji Takaki)

基本情報

所属
国立研究開発法人宇宙航空研究開発機構 宇宙科学研究所 准教授
学位
博士(工学)(東京大学)

J-GLOBAL ID
200901010820608589
researchmap会員ID
0000010945

論文

 38
  • 高木亮治
    航空宇宙技術 22 79-93 2023年8月  査読有り筆頭著者最終著者責任著者
  • Hiroyuki Asada, Yoshiharu Tamaki, Ryoji Takaki, Takaaki Yumitori, Shun Tamura, Keita Hatanaka, Kazuhiro Imai, Hirotaka Maeyama, Soshi Kawai
    AIAA Journal 61(8) 3466-3484 2023年7月  査読有り
    This study presents a fully automated Cartesian-grid-based compressible flow solver, named FrontFlow/Violet Hierarchical Cartesian for Aeronautics based on Compressible-flow Equations (FFVHC-ACE), for large-eddy simulation (LES) and its aeronautical applications. FFVHC-ACE enables high-fidelity LES of high-Reynolds-number flows around complex geometries by adopting three key numerical methods: hierarchical Cartesian grids, wall modeling in LES, and the kinetic-energy and entropy preserving (KEEP) scheme. The hierarchical Cartesian grids allow fully automated grid generation for complex geometries in FFVHC-ACE, and high-fidelity LES of high-Reynolds-number flows around complex geometries is realized by the wall modeling and the KEEP scheme on the non-body-fitted hierarchical Cartesian grids. We apply FFVHC-ACE to wall-modeled LES around high-lift aircraft configurations at wind-tunnel-scale Reynolds number [Formula: see text] and real-flight Reynolds number [Formula: see text], demonstrating the capability of FFVHC-ACE for fully automated grid generation and high-fidelity simulations around complex aircraft configurations. The computed flowfield and aerodynamic forces at the wind-tunnel-scale Reynolds number agree well with the experimental data provided in the past AIAA High Lift Prediction Workshop (Rumsey et al., Journal of Aircraft, Vol. 56, No. 2, 2019, pp. 621–644). Furthermore, the wall-modeled LES at the real-flight Reynolds number shows good agreement of the lift coefficient with flight-test data.
  • Hiroyuki Asada, Yoshiharu Tamaki, Ryoji Takaki, Soshi Kawai
    AIAA SCITECH 2023 Forum 2023年1月19日  
  • Hisaichi Shibata, Ryoji Takaki
    AIP ADVANCES 12(10) 2022年10月  査読有り
    Electrohydrodynamic (EHD) thrusters can silently propel small unmanned aerial vehicles without moving parts using corona discharges. Computational fluid dynamics would be a powerful tool to model the EHD thrusters and then optimize them. The drift-diffusion-Poisson equations govern corona discharges; hence, the equations can predict the current-voltage characteristics curves of EHD thrusters. However, the equations are too stiff to analyze EHD thrusters in the time domain. Here, we propose a perturbation technique to efficiently solve the stiff drift-diffusion-Poisson system in global (i.e., full two-dimensional or three-dimensional) and nonlinear (i.e., applied voltages higher than the corona inception voltage) regimes. Furthermore, we validated the method with the experimental results of a previous study. (C) 2022 Author(s).All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY)license (http://creativecommons.org/licenses/by/4.0/).
  • Srikanth Surendranath, Akira Oyama, Ryoji Takaki
    AIAA AVIATION 2022 Forum 2022年6月27日  

MISC

 65

講演・口頭発表等

 91

担当経験のある科目(授業)

 2

共同研究・競争的資金等の研究課題

 6

● 指導学生等の数

 2
  • 年度
    2021年度(FY2021)
    博士課程学生数
    総研大1名
    受託指導学生数
    2名
  • 年度
    2020年度(FY2020)
    博士課程学生数
    総研大1名
    受託指導学生数
    2名

● 専任大学名

 1
  • 専任大学名
    総合研究大学院大学(SOKENDAI)

● 所属する所内委員会

 2
  • 所内委員会名
    ISASニュース編集委員会
  • 所内委員会名
    大学院教育委員会