대한조선학회논문집 (Journal of the Society of Naval Architects of Korea)

  • 제59권3호
  • /
  • Pages.141-148
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  • 2022
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  • 1225-1143(pISSN)
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  • 2287-7355(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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하이브리드 난류 모델을 이용한 전류고정덕트 후류의 고정도 수치 해석

Computational Simulations of Turbulent Wake Behind a Pre-Swirl Duct Using a Hybrid Turbulence Model with High Fidelity

  • 강민재 (동아대학교 조선해양플랜트공학과) ;
  • 정재환 (선박해양플랜트연구소) ;
  • 조석규 (선박해양플랜트연구소) ;
  • 허재욱 (현대중공업 선박해양연구소) ;
  • 김상현 (현대중공업 선박해양연구소) ;
  • 이상봉 (동아대학교 조선해양플랜트공학과)
  • Kang, Min Jae (Department of Naval Architecture and Offshore Engineering, Dong-A University) ;
  • Jung, Jae Hwan (Korea Research Institue of Ships and Ocean Engineering) ;
  • Cho, Seok Kyu (Korea Research Institue of Ships and Ocean Engineering) ;
  • Hur, Jea-Wook (Ship Performance Research Department, Hyundai Maritime Research Institute, Hyundai Heavy Industries) ;
  • Kim, Sanghyeon (Ship Performance Research Department, Hyundai Maritime Research Institute, Hyundai Heavy Industries) ;
  • Lee, Sang Bong (Department of Naval Architecture and Offshore Engineering, Dong-A University)
  • 투고 : 2021.12.30
  • 심사 : 2022.03.07
  • 발행 : 2022.06.20
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초록

A hybrid turbulence model has developed by combining a sub-grid scale model using dynamic k equation in LES with k-𝜔 SST model of RANS equation. To ascertain potential applicability of the hybrid turbulence model, fully developed turbulent channel flows at Re𝜏=180 have been simulated of which computational domain has a top wall with coarse cells and a bottom wall with fine cells. The streamwise mean velocity and turbulent intensity profiles showed a good agreement with DNS data when using the hybrid model rather than using a single model in k-𝜔 SST or dynamic k equation models. Computational simulations of turbulent flows around KVLCC2 with a pre-swirl duct have been mainly performed using the hybrid turbulence model. Compared to the results obtained from RANS simulation with k-𝜔 SST model as well as LES with dynamic k equation SGS model, turbulent wakes of the duct in the present simulation using the hybrid turbulence model were very similar to that of LES. Also, the resistances acting on hull, rudder and duct in hybrid turbulence model were similar to those in RANS simulation whereas the viscous forces acting on the hull in LES had a significant error due to coarse cells inappropriate to the sub-grid scale model.

키워드

과제정보

본 논문은 선박해양플랜트연구소의 주요사업인 "해양구조물 전역거동해석 전산유체역학 핵심기술 개발(2/5, PES3940)"과 2022년도 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원(No. NRF-2019R1A2C1004682), "OpenFOAM 기반 추진기 공동예측 정도 향상 및 안정성 개선을 위한 수치 기법 개발"를 위한 현대중공업의 지원을 받아 수행된 연구 결과입니다.

참고문헌

  1. Hwang, A. and Lee, S.B., 2019. Influence of velocity interpolation at inlet boundary on turbulent channel flows. Journal of Computational Fluids Engineering, 24(2), pp.101-107. https://doi.org/10.6112/kscfe.2019.24.2.101
  2. Kim, J., Moin, P. and Moser, R., 1987. Turbulence statistics in fully developed channel flow at low Reynolds number. Journal of Fluid Mechanics, 177(1), pp.133-166. https://doi.org/10.1017/S0022112087000892
  3. Lee, K.S., Kim, M.C., Shin, Y.J. and Kang, J.G., 2019. Design of asymmetric pre-swril stator for KVLCC2 considering angle of attack in non-uniform flow fields of the stern. Journal of the Society of Naval Architects of Korea, 56(4), pp.352-360. https://doi.org/10.3744/SNAK.2019.56.4.352
  4. Lee, C.M., Shin, Y.J., Kim, M.C., Choi, J.E. and Chun, H.H., 2016. Design of asymmetric pre-swirl stator for LNG carrier according to variation of stator shapes. Journal of the Society of Naval Architects of Korea, 53(1), pp.37-44. https://doi.org/10.3744/SNAK.2016.53.1.37
  5. Shin, H.J., Lee, K.H., Han., M.R., Lee, C.Y. and Shin, S.C., 2013a. Pre-swirl duct of fuel oil saving device design and analysis for ship. Journal of the Society of Naval Architects of Korea, 50(3), pp.145-152. https://doi.org/10.3744/SNAK.2013.50.3.145
  6. Shin, H.J., Lee, J.S., Lee, K.H., Han, M.R., Hur, E.B. and Shin, S.C., 2013b. Numerical and experimental investigation of conventional and un-conventional preswirl duct for VLCC. International Journal of Naval Architecture and Ocean Engineering, 5(3), pp.414-430. https://doi.org/10.3744/JNAOE.2013.5.3.414
  7. Yoo, G.Y., Kim, M.C., Shin, Y.J., Shin, I. and Kim, H.W., 2019. Development and CFD analysis of a new type pre-swirl duct for 176k bulk carrier. Journal of the Society of Naval Architects of Korea, 56(4), pp.373-382. https://doi.org/10.3744/SNAK.2019.56.4.373