Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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The Interaction Between Modules Caused by Thermal Choking in a Supersonic Duct

덕트내 초음속 유동에서 열폐색에 의한 모듈 간의 간섭

  • 김장우 (호서대학교 디스플레이공학부) ;
  • 구경완 (호서대학교 국방과학기술학과) ;
  • 한창석 (호서대학교 국방과학기술학과)
  • Published : 2007.02.01
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Abstract

Airframe-integrated Scramjet engines of NASA Langley type consist of a compressor, a combustion chamber and a nozzle. When some disturbances occur in one module of the engine, its influences are propagated to other modules. In this study, it is investigated numerically how shock waves were caused by thermal choking in one module propagate upstream and how they influence adjacent modules. The calculations are carried out in 2-dimensional supersonic viscous flow model using explicit TVD scheme in generalized coordinates. The adverse pressure gradient caused by heat addition brings about separation of the wall boundary layers and formation of the oblique shock wave that proceed to upstream. This moving shock wave formed one module blocks the flow coming into the adjacent modules, which makes the modules unstarted.

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References

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