Journal of the Korean Society for Marine Environment & Energy (한국해양환경ㆍ에너지학회지)

The Korean Society for Marine Environment and Energy (한국해양환경•에너지학회)
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Numerical Study of Pre-swirl Stator for Model and Full Scales

스케일 변화에 따른 전류고정날개의 영향 수치해석

  • Park, Sunho (Department Ocean Engineering, Korea Maritime and Ocean University) ;
  • Oh, Gwangho (NEXTfoam Co., Ltd.) ;
  • Rhee, Shin Hyung (Department of Naval Architecture & Ocean Engineering, Research Institute of Marine Systems Engineering, Seoul National University) ;
  • Koo, Bon-Yong (American Bureau of Shipping (ABS)) ;
  • Lee, Hoseong (American Bureau of Shipping (ABS))
  • Received : 2014.05.15
  • Accepted : 2014.08.19
  • Published : 2014.08.25
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Abstract

Interests on energy saving devices (ESDs) have been increased with the concern of the energy efficiency design index (EEDI) developed by the international maritime organization (IMO). To study the influence of ESDs, KVLCC2 with energy saving pre-swirl stator (PSS) was selected. To validate the computations, computed nominal wake of the model scale ship was compared with the experimental data, and the numerical uncertainty assessment was done for the full scale ship computations. The PSS changed rotational flow, which was assistant to the propeller thrust for the model and full scale ships. Performances of the full scale ships were predicted by ITTC methods, and new prediction method was proposed.

IMO에서 제시한 EEDI를 만족시키기 위해 에너지 절감 장치에 대한 관심이 증대되었다. 본 논문에서는 전류고정날개를 부착한 KVLCC2를 대상선으로 선정하여 에너지 절감 선박에 대해 연구하였다. 계산 결과의 정도를 검증하기 위해 모형선의 공칭반류를 모사하여 실험과 비교하였으며, 실선 스케일 계산에서는 격자 민감도에 대해 불확실성 평가를 하였다. 모형선과 실선 스케일 계산결과를 보면 전류고정날개는 추진기로 유입되는 반류의 회전성분을 변화시켜 추력에 도움을 주었다. ITTC에서 제시한 방법을 이용하여 실선의 성능을 예측해 보았으며, 이를 보안하는 방법을 제안하였다.

Keywords

References

  1. Celik, F., 2007, "A numerical study for effectiveness of a wake equalizing duct", Ocean Engineering, Vol. 34, pp. 2138-2145. https://doi.org/10.1016/j.oceaneng.2007.04.006
  2. Choi, J.-E., Kim, J.-H., Choi, B.J., Lee, S.B., Chung, S.H., Seo, H.W., 2014, "Development of energy-saving devices for a hull slow-speed ship through improving propulsion performance", 12th International Symposium on Practical Design of Ships and Other Floating Structures, Changwon, Korea, October 20-25.
  3. Feng, P., Ma, N., Gu, X., 2013, "Hydrodynamic analysis and design investigation of a ship with wave devouring hydrofoils for energy efficient propulsion", 12th International Symposium on Practical Design of Ships and Other Floating Structures, Changwon, Korea, October 20-25.
  4. Hansen, H.R., Dinham-Peren, T., Nojiri, T., 2011, "Model and full scale evaluation of a propeller boss cap fins device fitted to an aframax tanker", 2nd International Symposium on Marine Propulsors, Hamburg, Germany, June 15-17.
  5. Hollenbach, U., Reinholz, O., 2011, "Hydrodynamic trends in optimizing propulsion", 2nd International Symposium on Marine Propulsors, Hamburg, Germany, June 15-17.
  6. Kawamura, T., Ouchi, K., Nojiri, T., 2012, "Model and full scale CFD analysis of propeller boss cap fins (PBCF)", Journal of Marine Science and Technology, 17, pp. 469-480. https://doi.org/10.1007/s00773-012-0181-2
  7. Lee, S.-K., Yu, K., Tseng, R.K.-C., 2014, "Propeller performance of a containership fitted with energy-safing rudder fin in a seaway", 12th International Symposium on Practical Design of Ships and Other Floating Structures, Changwon, Korea, October 20-25.
  8. Park, S., Park, S.W., Rhee, S.H., Lee, S.B., Choi, J.-E., Kang, S.H., 2013, "Investigation on the wall function implementation for the prediction of ship resistance", International Journal of Naval Architecture and Ocean Engineering, Vol. 5, pp. 33-46. https://doi.org/10.3744/JNAOE.2013.5.1.033
  9. Park, J.S., Choi, Y.B., Kim, S.P., Kim, I.P., Hwang, Y.S., Park, J.J., Kim, Y.S., "Installation structure of pre-swirl stator for low-speed vessel", Registered number of Korea patent: 10-2006-0108472.
  10. Shin, H.J., Lee, K.H., Han, M.R., Lee, C.Y., Shin, S.C., 2013, "Pre-swirl duct of fuel oil saving device design and analysis for ship", Journal of the Society of Naval Architects of Korea, Vol. 50, No. 3, pp. 145-152. https://doi.org/10.3744/SNAK.2013.50.3.145
  11. Shih, T.H., Liou, W.W., Shabbir, A., Yang, Z., Zhu, Z., 1995, "A new k-e eddy-viscosity model for high Reynolds number turbulent flows - model development and validation", Computers & Fluids, Vol. 24, No. 3, pp. 227-238. https://doi.org/10.1016/0045-7930(94)00032-T
  12. Seo, J.H., Seol, D.M., Lim, T.G., Park, S.T., Han, B.W., Rhee, S.H., 2013, "A stereo PIV measurement of a model ship wake in a towing tank with uncertainty assessment", 10th International Symposium on Particle Image Velocimetry, Delft, TheNetherlands, July 2-4.