세가지 마찰저항곡선의 특성에 관한 연구
A Study on a Characteristic of the Three Friction Resistance Lines
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초록
The speed-power prediction is one of the most important functions of towing-tank facilities. Generally, ITTC-1978 extrapolation method is employed for the full-scale powering prediction. During the procedure, the friction resistance line plays a major role to predict both model- and full-scale resistance. In this paper, the form factors determined by ITTC-1957 line for several kinds of vessels are compared with the values obtained using the lines proposed by Grigson(1993) and Katsui et al.(2005). Resistance and selfpropulsion coefficients predicted by three different friction resistance lines are minutely analyzed. Finally, brake powers and revolutions estimated by flat plate friction resistance lines of Grigson and Katsui et al. are compared with the results obtained from ITTC-1957 line.
Abstract
The speed-power prediction is one of the most important functions of towing-tank facilities. Generally, ITTC-1978 extrapolation method is employed for the full-scale powering prediction. During the procedure, the friction resistance line plays a major role to predict both model- and full-scale resistance. In this paper, the form factors determined by ITTC-1957 line for several kinds of vessels are compared with the values obtained using the lines proposed by Grigson(1993) and Katsui et al.(2005). Resistance and selfpropulsion coefficients predicted by three different friction resistance lines are minutely analyzed. Finally, brake powers and revolutions estimated by flat plate friction resistance lines of Grigson and Katsui et al. are compared with the results obtained from ITTC-1957 line.
참고문헌 (8)
- ITTC, "Report of Performance Committee", 15th ITTC, ~ (1978)
- Larsson, L, , Proceedings of Gothenburg 2000: A Workshop on CFD in Ship Hydrodynamics (2000)
- Grigson, C.W.B., "An Accurate Smooth Friction Line for Use in Performance Prediction", Trans. RINA Part A, 135, pp.149~162 (1993)
- Grigson, C.W.B, "A reanalysis of the Lucy Ashton and Victory experiments, Transactions", Trans. of RINA, 138(1), pp.17~130 (1996)
- ITTC, "Report of Propulsion Committee", 23rd ITTC, ~ (2002)
- Katsui, T., "The Proposal of a New Friction Line", Proc. 5th Osaka Colloquium on Advanced Research on Ship Viscous Flow and Hull Form Design by EFD and CFD Approaches, pp.76~83 (2005)
- Report of Resistance Committee, "ITTC", 25th ITTC, ~ (2008)
- Report of Specialist Committee on Powering Performance Prediction, "ITTC", 25th ITTC, ~ (2008)