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1999 Fiscal Year Final Research Report Summary

Study of unsteady phenomena of breakdown of tip vortex generated at supersonic flow field during the pass through oblique shock wave

Research Project

Project/Area Number 09650214
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionKitakyushu National College of Technology

Principal Investigator

KASHIMURA Hideo  Dept. of Control and Information, Kitakyushu National College of Technology, Prof., 制御情報工学科, 教授 (00044397)

Co-Investigator(Kenkyū-buntansha) YASUNOBU Tsuyoshi  Dept. of Control and Information, Kitakyushu National College of Technology, Associate Prof., 制御情報工学科, 助教授 (70239771)
Project Period (FY) 1997 – 1999
KeywordsCompressible flow / Shock wave / Diffraction / Vortex / Unsteady flow
Research Abstract

The unsteady phenomena of the flow field with the breakdown of the vortex by interaction with the shock wave was investigated in this study. The numerical analysis using the TVD method for the diffraction of the propagating shock wave at the sharp corner was carried out and the unsteady characteristics of the vortex behind the secondary shock wave was discussed. The flow visualization by means of the schlieren method was carried out to investigate the flow field with the interaction of vortex and a oblique shock wave was also carried out and the temperature distribution on the wedge surface was measured by the thermo-sensitive liquid crystal sheet with image processing system.
obtained results from the numerical and the experimental analysis are as follows ; 1.The temperature distribution on a wedge surface caused by interaction with a shock wave and vortex is clearly showed in the thermo-sensitive liquid crystal sheet. 2.The distortion of an oblique shock wave was observed by the interaction with vortex and influences to the position of a shock wave and a temperature distribution on a wedge surface was cleared. It is shown that the distortion of the oblique shock wave strongly depends on the pressure ratio of flow field and the position of a vortex generator. 3.By means of the pass through the vortex at the corner behind the diffracting shock of a opposite shock wave, the roll up of vortex to the corner is occurred and the triple point and the slip surface is generated.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 樫村秀男: "伝播する回折衝撃波背後の流れにおける渦形成"北九州工業高等専門学校研究報告. 31. 55-60 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 樫村秀男: "斜め衝撃波と渦との干渉により生じる衝撃波の変形"北九州工業高等専門学校研究報告. 32. 83-86 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 樫村秀男: "渦と衝撃波との干渉により生じる楔表面上の温度分布の感温液晶による計測"高速度撮影とフォトニクスに関する総合シンポジウム1999講演論文集. -. 301-304 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 安信強: "斜め衝撃波と渦との干渉に及ぼす圧力比の非定常的変化の影響"北九州工業高等専門学校研究報告. 33. 81-88 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.KASHIMURA: "Vortex Generation behind the Diffracted Shock Wave."Research Report of Kitakyushu National College of Technology. 31(in Japanese). 55-60 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.KASHIMURA: "Distortion of Shock Wave Caused by Interaction between Oblique Shock Wave and Vortex."Research Report of Kitakyushu National College of Technology. 32 (in Japanese). 83-86 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.KASHIMURA: "Measurement of Temperature Distribution on Wedge Surface Generated by Interaction between Vortex and Shock Wave Using Thermo-Liquid Crystal."Proc. Of Symp. On High Speed Photography and Photonics. 1999 (in Japanese). 301-304 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.YASUNOBU: "Effect on Unsteady Fluctuation of Pressure Ratio for Interaction Between Oblique Shock Wave and Vortex."Research Report of Kitakyushu National College of Technology. 33 (in Japanese). 81-88 (2000)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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