2024

Presentations

  • Masahito Akamine, Susumu Teramoto, and Koji Okamoto, “Microphones and Three-dimensional Background-Oriented Schlieren Measurements of an Ideally Expanded Supersonic Jet,” AIAA SciTech 2024, AIAA-2024-2101, Orlando, Florida, USA, Jan. 2024
  • Goshi Ichikawa, Masahito Akamine, Susumu Teramoto, and Koji Okamoto, “Ray Tracing Analysis of the Sound from a Supersonic Jet Impinging on an Inclined Plate,” AIAA SciTech 2024, AIAA-2024-2633, Orlando, Florida, USA, Jan. 2024

2023

Journal paper

  • Masahito Akamine, Susumu Teramoto, and Koji Okamoto, “Formulation and demonstrations of three-dimensional background-oriented Schlieren using a mirror for near-wall density measurements,” Experiments in Fluids, Vol. 64, No. 7, p. 134, 2023
    doi: 10.1007/s00348-023-03672-1

Presentations

  • Daichi Ogawa, Susumu Teramoto, and Koji Okamoto, “Resolvent analysis for compressibility effect on jet shear layer,” Asian Joint Conference on Propulsion & Power (AJCPP), AJCPP2023-049, Kanazawa, Ishikawa, Japan, Mar. 2023
  • Shun Nakamura, Susumu Teramoto, and Koji Okamoto, “Extension of a harmonic balance method to the incoming wake effect on the separated boundary layer,” Asian Joint Conference on Propulsion & Power (AJCPP), AJCPP2023-050, Kanazawa, Ishikawa, Japan, Mar. 2023
  • Hisana Sugimoto, Zheye Xie, Koji Okamoto, and Susumu Teramoto, “Experimental study on the operating characteristics of Tesla pump designed for liquid,” Asian Joint Conference on Propulsion & Power (AJCPP), AJCPP2023-154, Kanazawa, Ishikawa, Japan, Mar. 2023
  • Masahito Akamine, Susumu Teramoto, and Koji Okamoto, “A validation of three-dimensional near-wall density measurement with background-oriented schlieren using mirror,” Asian Joint Conference on Propulsion & Power (AJCPP), AJCPP2023-074, Kanazawa, Ishikawa, Japan, Mar. 2023
  • Masahito Akamine and Koji Okamoto, “Formulation and demonstrations of three-dimensional background-oriented schlieren using a mirror for near-wall density measurements,” Experiments in Fluids Seminar Series (invited), Online, Oct. 2023.
    doi: 10.52843/cassyni.ym3wjc
  • Yuma Iwamoto, Susumu Teramoto, and Koji Okamoto, “Acceleration of Large-Eddy Simulation Using Harmonic Balance Method for Unsteady Flows with Low Non-dimensional Frequency,” Global Power & Propulsion Society (GPPS) International Technical Conference, TUADAM-164, Hong Kong, China, Oct. 2023
  • Masahito Akamine, Susumu Teramoto, and Koji Okamoto, “An Investigation on Spatial Resolution in Three-Dimensional Background-Oriented Schlieren Measurement of a Supersonic round Jet,” International Gas Turbine Congress (IGTC) 2023, TuAM12.2, Kyoto, Japan, Nov. 2023
  • Yuma Iwamoto, Susumu Teramoto, and Koji Okamoto, “Acceleration of Large-Eddy Simulation Using Harmonic Balance Method for Unsteady Flows with Low Reduced Frequency,” International Gas Turbine Congress (IGTC) 2023, ThAM16.1, Kyoto, Japan, Nov. 2023
  • Kazuki Matsumoto, Youngha Kwon, Koji Okamoto, Masahito Akamine, and Susumu Teramoto, “Development and evaluation of laser acoustic measurement system for supersonic jet noise,” Acoustics 2023, Sydney, Australia, Dec. 2023

2022

Journal papers

  • Masahito Akamine, Seiji Tsutsumi, Koji Okamoto, Susumu Teramoto, and Satoshi Nonaka, “Interpretation of Multilobe Wavepackets in Spectral Proper Orthogonal Decomposition of Supersonic Jet,” AIAA Journal, Vol. 60, No. 1, pp. 56-64, 2022
    doi: 10.2514/1.J060341
  • Yuma Iwamoto, Susumu Teramoto, Koji Okamoto, “Computationally Efficient Large-Eddy Simulation of Periodic Unsteady Flow using Harmonic Balance Method,” Journal of Thermal Science, Vol. 31, No. 1, pp. 62-71, 2022
    doi: 10.1007/s11630-022-1559-z

Presentation

  • Yuma Iwamoto, Susumu Teramoto, Koji Okamoto, “Large-Eddy Simulation of Slowly Pulsating Channel Flow Using Harmonic Balance Approach,” AIAA SciTech 2022, AIAA-2022-0773, Jan. 2022

2021

Journal paper

  • Masahito Akamine, Koji Okamoto, Susumu Teramoto, Seiji Tsutsumi, “Experimental study on effects of plate angle on acoustic waves from supersonic impinging jets,” The Journal of the Acoustical Sociaty of America, Vol. 150, No. 3, pp. 1856-1865, 2021
    doi: 10.1121/10.0006236

Presentations

  • Ayuki Yamamura, Koji Okamoto, Susumu Teramoto, Masahito Akamine, “Optical Measurement of Supersonic Jet Noise Using 2-D Position Sensitive Detector,” Asian Joint Conference on Propulsion & Power (AJCPP), 4B2-2, Mar. 2021
  • Atsushi Takemura, Shota Yamano, Koji Okamoto, Susumu Teramoto, Kazuo Yamaguchi, “Effect of Gas Supply Temperature Ratio on Wave Rotor Inlet and Outlet Port Condition,” Asian Joint Conference on Propulsion & Power (AJCPP), 5E2-2, Mar. 2021
  • Y. Murata, H. Daiguji, K. Okamoto, T. Ishii, “Experimental Study on the Acoustic Field Caused by Supersonic Jet -Effect of Sound Absorbing Materials-,” Asian Joint Conference on Propulsion & Power (AJCPP), 5D3-5, Mar. 2021
  • Yuma Iwamoto, Susumu Teramoto, Koji Okamoto, “Extension of Harmonic Balance Approach for Large-eddy Simulation of Unsteady Flows in Cascade,” ASME Turbo Expo 2021, GT2021-59193, Jun. 2021
  • Yuma Iwamoto, Susumu Teramoto, Koji Okamoto, “Computational Efficient Large-Eddy Simulation of a Periodic Unsteady Flow using Harmonic Balance Method,” Asian Congress on Gas Turbines (ACGT) 2020, 079, Aug. 2021

2020

Journal papers

  • Masashi Kurokawa, Susumu Teramoto, Koji Okamoto, “Acoustic Wave Generation from Two-Dimensional Supersonic Inviscid Jet Impinging on Inclined Plate,” AIAA Journal, Vol. 58, No. 8, pp. 3436-3445, 2020
    doi: 10.2514/1.J059012
  • Takahiko Toki, Susumu Teramoto, Koji Okamoto, “Velocity and Temperature Profiles in Turbulent Channel Flow at Supercritical Pressure,” Journal of Propulsion and Power, Vol. 36, No. 1, pp. 3-13, 2020
    doi: 10.2514/1.B37381

Presentation

  • Masahito Akamine, Seiji Tsutsumi, Koji Okamoto, Susumu Teramoto, Satoshi Nonaka, “Comparison of Modal and Conditional Analyses for Intermittent Phenomena in Jet Noise,” AIAA SciTech 2020, AIAA-2020-0997, Jan. 2020

2019

Journal papers

  • Masahito Akamine, Koji Okamoto, Susumu Teramoto, Seiji Tsutsumi, “Conditional sampling analysis of high-speed schlieren movies of Mach wave radiation in a supersonic jet,” The Journal of the Acoustical Society of America, Express Letters, Vol. 145, No. 1, EL122-EL128, 2019
    doi: 10.1121/1.5088493
  • Tracianne B. Neilsen, Aaron B. Vaughn, Kent L. Gee, Masahito Akamine, Koji Okamoto, Susumu Teramoto, Seiji Tsutsumi, “Data-educed, broadband equivalent acoustic source model for supersonic jet noise,” The Journal of the Acoustical Society of America, Vol. 146, No. 5, pp. 3409-3424, 2019
    doi: 10.1121/1.5132947

2018

Journal paper

  • Masahito Akamine, Koji Okamoto, Kent L. Gee, Tracianne B. Neilsen, Susumu Teramoto, Takeo Okunuki, Seiji Tsutsumi, “Effect of Nozzle–Plate Distance on Acoustic Phenomena from Supersonic Impinging Jet,” AIAA Journal, Vol. 56, No. 5, pp. 1943-1952, 2018
    doi: 10.2514/1.J056504

Presentation

  • Y. Murata, K. Iwasa, T. Ishii, K. Okamoto, S. Kaneko, “Fundamental study on the acoustic fields caused by the interference of supersonic jet with a perforated plate,” 176th Meeting of the Acoustical Society of America, 1pNS8, Nov, 2018