Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Preliminary CFD Results of a Dual Bell Nozzle based on the KSLV-II

한국형발사체를 기반으로 한 듀얼 벨 노즐의 전산수치해석 기초 결과

  • Kim, Jeonghoon (Department of Aerospace Engineering, Graduate School at Chungnam National University) ;
  • Choi, Junsub (Department of Aerospace Engineering, Graduate School at Chungnam National University) ;
  • Huh, Hwanil (Department of Aerospace Engineering, Chungnam National University)
  • Received : 2016.09.06
  • Accepted : 2016.11.17
  • Published : 2016.12.01
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Abstract

Numerical analysis was conducted as a preliminary study for evaluating the dual bell nozzle. For future parametric studies, a dual bell nozzle was designed, and thereafter inlet condition, turbulence model, and the number of optimum grids were determined. Dual bell nozzle was designed based on the KSLV-II first stage nozzle. Inlet condition was determined to frozen flow model of non-reacting eight species by comparing with the design values. SST $k-{\omega}$ model turned out to be suitable as turbulence model. About 150 thousand of the grids were selected after grid sensitivity tests. Based on the results determined in this study, we plan to investigate performance gain of the KSLV-II by adopting a proposed dual bell nozzle.

듀얼 벨 노즐을 평가하기 위한 기초연구로써 전산수치해석을 진행하였다. 추후 진행할 설계 변수 연구를 위해 듀얼 벨 노즐을 설계하고 입구 조건과 난류 모델, 최적 격자수를 선정하였다. 듀얼 벨 노즐은 KSLV-II 1단 노즐을 기반으로 설계하였다. 입구 조건은 설계 값과의 비교를 통해 비반응 8화학종의 동결유동 모델로 결정하였다. 난류 모델은 SST $k-{\omega}$ 모델이 가장 적합하였다. 격자 민감도 해석을 통해 약 15만개의 최적 격자수를 선정하였다. 본 연구에서 결정한 내용들을 바탕으로 향후 한국형발사체에 듀얼 벨 노즐을 적용한 해석을 진행하여 성능 이득을 연구하고자 한다.

Keywords

References

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