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

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study of the Compound Choking Phenomenon in Gas Flows

기체유동에서 발생하는 복합초킹 현상에 관한 연구

  • 이준희 (안동대학교 대학원 기계공학과) ;
  • 백승철 (경북대학교 대학원 기계공학과) ;
  • 최보규 ((주)동화엔텍 기술연구소) ;
  • 김희동 (안동대학교 기계공학부)
  • Published : 2003.01.01
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Abstract

Compound choking frequently occurs at a minimum area of the flow passage, where two or more streams which have different stagnation properties are merged. This phenomenon is especially important in that the flow choking may not be given by Mach number, M=1 at the nozzle throat. In order to obtain a detailed understanding of the flow characteristics involved in the compound flow choking, the two-dimensional, compressible, Wavier-Stokes equations are solved using a fully implicit finite volume method and the predicted solutions are compared with the results of the one-dimensional theoretical analysis. Stagnation pressure and temperature of each stream are changed to investigate the effects on the compound choking. The results show that stagnation pressures of each stream affect Mach number and static pressure distributions downstream of the exit of the convergent nozzle. However, the flow characteristics of the compound choking are not significantly dependent on the total temperature ratio.

Keywords

References

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