Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Performance Analysis and Configuration Design of the Thruster Nozzle for Ground-firing Test and Evaluation

지상연소시험평가용 추력기 노즐의 성능해석과 형상설계

  • 감호동 (부경대학교 대학원 에너지시스템공학과) ;
  • 김정수 (부경대학교 기계공학과) ;
  • 배대석 (부경대학교 기계공학과)
  • Received : 2012.01.16
  • Accepted : 2012.03.20
  • Published : 2012.04.01
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Abstract

A computational analysis of nozzle flow characteristics and plume structure is conducted to examine performance of the supersonic nozzle employed in a thruster for ground firing test. At first, flow simulations in two-dimensional converging-diverging nozzle are performed for the verification of computational capability as well as turbulence model validity. Axisymmetric converging-diverging nozzles for ground firing test are analyzed with the k-${\omega}$ SST model. A performance penalty caused by flow separation in a diverging section is observed in initially-designed nozzle. The performance could be enhanced by the modification of the diverging section of nozzle contour.

지상연소시험용 추력기 노즐의 성능해석을 위하여 노즐유동 특성 및 플룸 구조를 해석한다. 2차원 축소확대 노즐유동을 해석하고, 이를 실험값과 비교하여 해석기법 검증 및 난류모델 선정을 수행한다. k-${\omega}$ SST 난류모델을 사용한 Reynolds-averaged Navier-Stokes 방정식으로 2차원 축대칭 지상연소시험용 노즐을 해석한 결과, 초기 설계된 노즐내부에서 충격파 및 유동박리에 의한 성능저하가 관찰되었다. 이에 노즐 확대부분의 형상을 수정하여 성능 향상을 확인하였다.

Keywords

References

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