Resistance experiments on a systematic series of high speed displacement monohull and catamaran forms in shallow water英文电子书.pdf

Resistance experiments on a systematic series of high speed displacement monohull and catamaran forms in shallow water. A.F. Molland, P.A. Wilson and D.J. Taunton. Ship Science Report No. 127 University of Southampton 2003 Contents Nomenclature 2 1 Introduction 3 2 Description of Models 3 3 Facilities and Tests 4 3.1 General4 3.2 Wave Pattern Resistance 4 3.3 Trim and Sinkage Measurements 5 4 Data Reduction and Correction 5 4.1 Coefficients5 4.2 Temperature Correction5 4.3 Resistance due to Turbulence Studs 6 4.4 Wetted Surface Area 6 5 Presentation of Data 6 6 Discussion of Results 7 6.1 Total resistance and wave pattern resistance 7 6.2 Running sinkage and trim 8 6.3 Wave properties 9 6.3.1 General 9 6.3.2 Distribution of wave resistance (energy) 9 7 Conclusions 10 Acknowledgements 10 References 11 Tables 12 Figures14 1 Nomenclature Demihull: One of the hulls which make up the catamaran. A Wetted surface area (demihull) [m2 ] FnL Froude Number [V(gL)-1/2] -1/2 FnH Depth Froude Number [V(gh) ] H Water depth [m] L Length of model on waterline [m] S Separation between catamaran demihull centrelines [m] T Wave period [s] V Ship speed [ms-1] Y Distance of wave cut from centreline of model [m] CF Coefficient of frictional resistance [ITTC’57 correlation line] 2 C Coefficient of residuary resistance [R /(½ρAV )] R R