Siu Fung NG - Academia.edu (original) (raw)
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Universidade Federal de Santa Catarina - UFSC (Federal University of Santa Catarina)
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Papers by Siu Fung NG
Naval engineers journal, 1987
High-speed displacement vessels are widely used in most of the smaller navies because they provid... more High-speed displacement vessels are widely used in most of the smaller navies because they provide low operating costs, combined with performance adequate for policing 200-nm exclusive econnomic zones. Feasibility designs of these kinds of vessel, such as corvettes and patrol boats, always require calm water resistance estimates. This paper is an attempt to use available data to analyze main hull form parameters that affect the resistance characteristics of the vessel. A few high-speed roundbilge methodical series (such as the well-known series 64, NPL-HSRB, SSPA-SFDV, HSVA ' C ' series and Canadian fast surface ship series) as well as some numerical formulas from regression analyses are available for the powering studies of this type of vessel. However, any attempt to design a good highspeed displacement hull by adopting the previously mentioned methodical series has to be carefully examined. The main hull form parameters must be appropriate to the speed range, due to some distinctive resistance characteristics at Froude numbers larger or smaller than 0.45-0.55. This paper covers some basic considerations of these aspects, by utilizing several computer programs which were developed by the author based on some of the high-speed round-bilge methodical series. Finally, other hull form parameters that may affect resistance are discussed.
Naval engineers journal, 1987
High-speed displacement vessels are widely used in most of the smaller navies because they provid... more High-speed displacement vessels are widely used in most of the smaller navies because they provide low operating costs, combined with performance adequate for policing 200-nm exclusive econnomic zones. Feasibility designs of these kinds of vessel, such as corvettes and patrol boats, always require calm water resistance estimates. This paper is an attempt to use available data to analyze main hull form parameters that affect the resistance characteristics of the vessel. A few high-speed roundbilge methodical series (such as the well-known series 64, NPL-HSRB, SSPA-SFDV, HSVA ' C ' series and Canadian fast surface ship series) as well as some numerical formulas from regression analyses are available for the powering studies of this type of vessel. However, any attempt to design a good highspeed displacement hull by adopting the previously mentioned methodical series has to be carefully examined. The main hull form parameters must be appropriate to the speed range, due to some distinctive resistance characteristics at Froude numbers larger or smaller than 0.45-0.55. This paper covers some basic considerations of these aspects, by utilizing several computer programs which were developed by the author based on some of the high-speed round-bilge methodical series. Finally, other hull form parameters that may affect resistance are discussed.