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초음속 노즐 유동의 최적해석을 위한 난류모델의 평가와 선정

Assessment and Validation of Turbulence Models for the Optimal Computation of Supersonic Nozzle Flow

  • 감호동 (부경대학교 대학원 에너지시스템공학과) ;
  • 김정수 (부경대학교 기계공학과)
  • 투고 : 2012.11.30
  • 심사 : 2013.01.21
  • 발행 : 2013.02.01

초록

초음속 축소-확대 노즐 유동을 정확하게 해석하기 위하여, 실험치와 해석값 사이의 비교를 통해 난류모델 성능평가를 수행한다. Boussinesq 가정을 적용한 RANS 방정식으로 2차원 노즐 유동을 해석하되, Spalart-Allmaras, RNG k-${\varepsilon}$, 그리고 k-${\omega}$ SST 난류모델을 평가에 사용한다. 각 모델들로 계산된 노즐 벽면의 압력구배 및 충격파 구조는 실험 데이터와 유사한 결과를 보였는데, 그 중에서도 SST 난류모델이 실험값에 가장 근접한 해석결과를 나타내었다.

Assessment and validation of RANS turbulence models are conducted for the optimal analysis of supersonic converging-diverging nozzle through the comparison between computational results and experimental data. One/two equation turbulence closures such as Spalart-Allmaras, RNG k-${\varepsilon}$, and k-${\omega}$ SST are employed to simulate the two-dimensional nozzle flow. Computational results with the turbulence models mentioned fairly well predict shock structure of the nozzle-inside and pressure distribution along the wall. Especially, SST model among the employed ones shows the best agreement to experimental results.

과제정보

연구 과제 주관 기관 : 한국연구재단

참고문헌

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피인용 문헌

  1. A Computational Study on the Shock Structure and Thrust Performance of a Supersonic Nozzle with Overexpanded Flow vol.18, pp.4, 2014, https://doi.org/10.6108/KSPE.2014.18.4.001
  2. The Mechanism for the Quasi-Back-Attack Phenomenon of Gas Jets Submerged in Water pp.2093-2480, 2019, https://doi.org/10.1007/s42405-018-00138-1