JAXA Supercomputer System Annual Report April 2017-March 2018 Report Number: R17ETET12 Subject Category: Skills Acquisition System PDF Responsible Representative: Takashi Takahashi, Aeronautical Technology Directorate, Numerical Simulation Research Unit Contact Information: Kenji Kobayashi knjkoba@chofu.jaxa.jp Members: Kenji Kobayashi Abstract Coherent structures around a re-entry capsule were investigated using the unsteady flow solver FaSTAR. A re-entry capsule shows dynamic instability in subsonic and transonic speeds. This study focused on the subsonic unsteady flow around the capsule and investigated the mechanism of the dynamic・・・<<read more>>
JAXA Supercomputer System Annual Report April 2017-March 2018 Report Number: R17ETET15 Subject Category: Skills Acquisition System PDF Responsible Representative: Yoshikazu Makino, Aeronautical Technology Directorate Next Generation Aeronautical Innovation Hub Center Contact Information: Dongyoun Kwak kwak.dongyoun@jaxa.jp Members: Hotaka Kobayashi, Yutaro Yamasaki, Dongyoun Kwak, Shihoko Endo, Hiroki Adachi, Shoya Ogino Abstract Innovative drag reduction technologies are investigated to reduce the fuel consumption for a conventional aircraft configuration. Aircraft noise prediction technologies and the conceptual design technologies are also developed for future aircraft・・・<<read more>>
JAXA Supercomputer System Annual Report April 2017-March 2018 Report Number: R17ETET17 Subject Category: Skills Acquisition System PDF Responsible Representative: Takashi Aoyama, Aeronautical Technology Directorate, Numerical Simulation Research Unit Contact Information: Takashi Ishida ishida.takashi@jaxa.jp Members: Toru Yamaya, Daichi Asaoka Abstract The purpose of this research is to construct a collision model considering the influence of bulk viscosity and verify the stability in high Reynolds number flow analysis. In order to compare the computational stability and calculation time using SRT (Single-Relaxation Time)・・・<<read more>>
JAXA Supercomputer System Annual Report April 2017-March 2018 Report Number: R17ETET18 Subject Category: Skills Acquisition System PDF Responsible Representative: Takashi Yamane, Aeronautical Technology Directorate, Propulsion Research Unit Contact Information: Seiji Yoshida yoshida.seiji@jaxa.jp Members: YOSHIDA Seiji(JAXA), Mitsumasa Makida(JAXA), Naoki Nakamura(ASIRI), Takeishi Ikumi(Waseda univ.) Abstract Lean combustion is promising to reduce nitrogen oxide emission from jet-engines. To solve combustion instability, that is a problem of lean combustion, a pilot burner for ensuring stable combustion and a main burner for performing lean, low-NOx・・・<<read more>>
JAXA Supercomputer System Annual Report April 2017-March 2018 Report Number: R17ETET21 Subject Category: Skills Acquisition System PDF Responsible Representative: Takashi Aoyama, Aeronautical Technology Directorate, Numerical Simulation Research Unit Contact Information: Atsushi Hashimoto hashimoto.atsushi@jaxa.jp Members: Yoimi Kojima, Yoichi Saito Abstract Shock-wave/boundary layer interaction on the suction side of the wing at high Mach number and/or high angle of attack leads to large scale self-sustained motion of the shock wave. This phenomenon is called transonic buffet. The buffet leads to dangerous structural・・・<<read more>>
