Improvement of hull form for an 1,800 TEU containership toward reduced fuel consumption under in-service conditions
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초록
In the present study, the hull form of an 1,800 TEU containership was developed to reduce fuel consumption under real operation conditions. Contrary to the conventional hull form design practice in terms of the calm-sea performance, the hull form design in this study was aimed at improving the performance of a ship under in-service condition, which is closely associated with the added resistance due to waves. In order to reduce the added resistance due to waves, the bow hull form was modified to have sharper entrance with increased length between perpendicular. This enabled the waves to follow the bow part more smoothly. The added resistance of the developed hull was predicted by means of a series of CFD simulations in regular waves with wavelengths l=Lpp ¼ 0:5 2:0. The added resistance at irregular waves was calculated by frequency integration. The Daily Fuel Oil Consumption (DFOC) was subsequently calculated based on the wave statistics on the operating route. The significance of the present study lies in the point that the performance evaluation was carried out by means of the freesurface CFD simulation in the presence of regular waves. Final performance verification was made through a series of model tests. The resulting DFOC and daily CO2 emission for the optimal hull form under the in-service conditions was found to be reduced by 7.65%. Furthermore, the calm-sea DFOC and CO2 emission were also improved by 3.43%.
Abstract
In the present study, the hull form of an 1,800 TEU containership was developed to reduce fuel consumption under real operation conditions. Contrary to the conventional hull form design practice in terms of the calm-sea performance, the hull form design in this study was aimed at improving the performance of a ship under in-service condition, which is closely associated with the added resistance due to waves. In order to reduce the added resistance due to waves, the bow hull form was modified to have sharper entrance with increased length between perpendicular. This enabled the waves to follow the bow part more smoothly. The added resistance of the developed hull was predicted by means of a series of CFD simulations in regular waves with wavelengths l=Lpp ¼ 0:5 2:0. The added resistance at irregular waves was calculated by frequency integration. The Daily Fuel Oil Consumption (DFOC) was subsequently calculated based on the wave statistics on the operating route. The significance of the present study lies in the point that the performance evaluation was carried out by means of the freesurface CFD simulation in the presence of regular waves. Final performance verification was made through a series of model tests. The resulting DFOC and daily CO2 emission for the optimal hull form under the in-service conditions was found to be reduced by 7.65%. Furthermore, the calm-sea DFOC and CO2 emission were also improved by 3.43%.
참고문헌 (22)
- Ebira, K., "Development of a new stem to increase the propulsive performance of LPG carriers", J. Kansai Soc. Naval Architect, 241, pp.25~32 (2004)
- El Moctar, O., "Numerical and experimental analysis of added resistance of ships in waves", J. Offshore Mech. Arctic Eng, 139(1), pp.011301~011309 (2017)
- Fujii, H., "Experimental study on the resistance increase of a ship in regular oblique waves", Proceeding of the 14th ITTC, pp.351~360 (1975)
- Guo, B., "Evaluation of added resistance of KVLCC2 in short waves", J. Hydrodyn, 23(6), pp.709~722 (2011)
- Hirota, K., "Development of bow shape to reduce the added resistance due to waves and verification of full scale measurement", Proceedings of the First International Conference on Marine Research and Transportation (ICMRT05), pp.63~70 (2005)
- Hwang, S., "Experimental study on the effect of bow hull forms to added resistance in regular head waves", Proceedings of the 12th International Symposium on Practical Design of Ships and Other Floating Structures, pp.39~44 (2013)
- ITTC, "Report of Seakeeping Committee", Proceeding of the 12th ITTC (1969)
- ITTC, "ITTC-recommended procedures and guidelines. In: Prediction of Power Increase in Irregular Waves from Model Test. No.7.5-02-07-02.2", ~ (2014)
- Journee, J. M. J., "Prediction of speed and behaviour of a ship in a seaway", Int. Shipbuild. Prog, 23(265), pp.1~24 (1976)
- 김유철, "Analysis of added resistance and seakeeping responses in head sea conditions for low-speed full ships using URANS approach", International Journal of Naval Architecture and Ocean Engineering, 9(6), pp.641~654 (2017), 대한조선학회
- Cheol-Min Lee, "Effects of diffraction in regular head waves on added resistance and wake using CFD", International Journal of Naval Architecture and Ocean Engineering, 11(2), pp.736~749 (2019), 대한조선학회[DOI]
- Cheol-Min Lee, "Effect of bow hull forms on the resistance performance in calm water and waves for 66k DWT bulk carrier", International Journal of Naval Architecture and Ocean Engineering, 11(2), pp.723~735 (2019), 대한조선학회[DOI]
- Orihara, H., "Evaluation of added resistance in regular incident waves by computational fluid dynamics motion simulation using an overlapping grid system", J. Mar. Sci. Technol, 8, pp.47~60 (2003)
- Park, S. -W., "Hull form optimization study based on multiple parametric modification curves and free surface ReynoldsAveraged Navier-Stokes (RANS) solver", Applied Sciences-Basel, 12(5) (2022)
- Sadat-Hosseini, H., "CFD verification and validation of added resistance and motions of KVLCC2 with fixed and free surge in short and long head waves", Ocean Eng, 59, pp.240~273 (2013)
- Seo, M. G., "Comparative study on computation of ship added resistance in waves", Ocean Eng, 73, pp.1~15 (2013)
- Siemens, "Simcenter STAR-CCMþ Documentation Version 2020", ~ (2020)
- Tsujimoto, M., "A practical correction method for added resistance in waves", J. JASNAOE, 8, pp.177~184 (2008)
- Van, S. H., "Experimental investigation of the flow characteristics around practical hull forms", Third Osaka Colloquium on Advanced CFD Applications to Ship Flow and Hull Form Design (1998)
- 유진원, "Bow hull-form optimization in waves of a 66,000 DWT bulk carrier", International Journal of Naval Architecture and Ocean Engineering, 9(5), pp.499~508 (2017), 대한조선학회
- Yu, J. W., "Effect of ship motions on added resistance in regular head waves of KVLCC2", Ocean Eng, 146, pp.375~387 (2017)
- Yu, J. W., "An optimization study on the hull form and stern appendage for improving resistance performance of a coastal fishing vessel", Appl. Sci. Basel, 11(13) (2021)