A Combined Study on Shock Diffraction

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5th Symposium on Integrating CFD and Experiments in Aerodynamics (October 3-5, 2012, Chofu Aerospace Center, Japan Aerospace Exploration Agency (JAXA)), Chofu, Tokyo, Japan

Shock wave diffraction is a complex process which has been studied at great length but has never been fully understood. The diffraction process creates numerous complex wave structures, a shear layer and a strong vortex. The structure of this shear layer has been the subject of numerous studies. Some simulations have shown this shear layer to be unstable, observing that it develops Kelvin-Helmholtz-style instabilities. Simulation performed in this work show a strong grid dependency. The diffraction process is widely regarded as self-similar in time; however, these instabilities have never been seen experimentally at small time scales. The high speed and small scale of the phenomena present make them extremely challenging to visualise using any experimental method. The aim of this work is to provide a complete picture of the phenomena that occur when a Mach 1.46 shock diffracts around a 172 degree corner while presenting the experimental techniques which are most suited to this type of flow.

形態: カラー図版あり

Physical characteristics: Original contains color illustrations

資料番号: AA0062070023

レポート番号: JAXA-SP-13-001E

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詳細情報 詳細情報について

  • CRID
    1050574036225047424
  • NII論文ID
    120006827904
  • NII書誌ID
    AA11984031
  • ISSN
    1349113X
  • Web Site
    http://id.nii.ac.jp/1696/00004125/
  • 本文言語コード
    en
  • 資料種別
    conference paper
  • データソース種別
    • IRDB
    • CiNii Articles

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