船舶流体力学関係基本用語集 - Osaka U

1 Added resistance advance ratio amplitude anti-fouling paint self-polishing paint appendage bound vortex free vortex horse shoe vortex trailing vortex circulation bow bulb stern bulb bubble cavitation catamaran diverging wave transverse wave effective power continuity equation erosion expanded area ratio form factor free surface condition hull surface condition hump hollow kinematic viscosity laminar boundary layer turbulent boundary layer momentum thickness multiphase flow natural period frequency of encounter propeller efficiency propeller open test propulsive efficiency similarity law self-propulsion test shear stress stagnation point stream line tracing method thrust deduction wake fraction trailing edge leading edge viscosity wave making resistance wave breaking resistance frictional resistance eddy making resistance spray resistance separation resistance viscous resistance angle of vanishing stability inclining experiment center of buoyancy center of floatation hydrostatic curve metacentric height neutral equilibrium righting arm (lever)

2 Righting couple initial stability displacement volume wall-sided wetted surface area water plane area block coefficient midship section coefficient upright condition added mass advance transfer tactical diameter turning radius bank suction force check helm conformal mapping course stability criterion crash astern (or stop) drift angle heading angle sinkage trim squat effective angle of attack flow straightening coefficient residual resistance rudder normal force slewing motion induced velocity wash down zig-zag maneuver zig -zag centrifugal force centripetal force inertia force moment of inertia gyrational radius product of inertia logarithmic decrement convolution integral reflection transmission resonance resonant frequency reciprocity relation probability distribution significant wave height restoring force wave drift force wave exciting force wave steepness maximum wave slope green water (or sea)

3 Group velocity phase velocity waterline lee side weather side starboard side port side nominal speed loss voluntary speed loss seakeeping progressive wave standing wave surface tension capillary wave surface wave tidal wave wave celerity (speed) wave length wave number regular wave crest trough irregular wave short-crested wave head sea following sea beam sea bow quartering sea stern quartering sea