Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Structural Analysis of Liquid Rocket Thrust Chamber Regenerative Cooling Channel using Bodner-Partom Viscoplastic Model

Bodner-Partom 점소성 모델을 이용한 액체로켓 연소기 재생냉각 채널 구조해석

  • 류철성 (한국항공우주연구원 연소기팀) ;
  • 백운봉 (한국표준과학연구원) ;
  • 최환석 (한국항공우주연구원 연소기팀)
  • Published : 2006.12.30
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Abstract

Elastic-viscoplastic structural analysis has been performed for regenerative cooling chamber of liquid rocket thrust chamber using Bodner-Partom visco-plastic model. Strain rate test was conducted for a copper alloy at various temperatures in order to get material constants of visco-plastic model used in the structural analysis. Material constants of visco-plastic model were obtained from strain rate test results and visco-plastic model was incorporated into finite element program, Marc, by means of a user subroutine. The structural analysis results indicated that the deformation of cooling channel is mostly caused by thermal loading rather than pressure loading and confirmed structural stability of the cooling channel under the operating condition.

Bodner-Partom 점소성 모델을 이용하여 액체로켓 연소기 재생냉각 챔버의 구조해석을 수행하였다. 구조해석에 사용한 점소성 모델의 재료상수를 구하기 위하여 구리합금에 대하여 변형률 속도를 변화시켜 인장시험을 상온 및 고온에서 수행하였다. 점소성 모델은 상용유한요소 해석 프로그램인 Marc의 사용자 서브루틴을 이용하여 구현하였다. 구조해석 결과 냉각 채널은 압력에 의한 하중보다 열하중에 의하여 대부분의 변형이 발생하며 연소기의 작동조건에서 냉각 채널의 구조적인 안정성 여부를 확인할 수 있었다.

Keywords

References

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