A Study on the Transitional Shock Separation Patterns in an Over-Expanded Nozzle

과팽창 노즐에서 발생하는 충격파 박리 패턴의 천이에 관한 연구

  • 이종성 (안동대학교 대학원 기계공학과) ;
  • ;
  • 김희동 (안동대학교 기계공학과)
  • Received : 2010.03.22
  • Accepted : 2010.05.13
  • Published : 2010.06.30


Numerical investigation was carried out on axisymmetric over-expanded rocket nozzle to predict flow fields of transitional shock separation patterns. The unsteady, compressible N-S equations with k-$\omega$ SST for turbulence model closure were solved using a fully implicit finite volume scheme. Computed results were in good agreement with previous experimental works. It was found that strong side-loads were generated during the transition of RSS to FSS due to the development of a vortex ring in the inviscid jet core region. Hysteresis phenomenon exhibited by the shock-separation patterns was also found during the start-up and shut-down processes.


Supported by : 한국연구재단


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