978 



HYDRODYNAMICS IN SHIP DESIGN 



Vortex(es), references to flow photographs of, 37 



spacing, long'l and transv in a vortex street, 141 

 streets and vibrating bodies, 141 

 trails, eddy-frequency relations, 142 



references to, 144 



schematic diagram of, 6 



'Wake(s), -adapted screwprop, design of, 609 

 anah'sis diagram for ABC ship, 367 



of, around or behind ship or model, 248, 250, 254, 

 261 

 bibliography on, 262 

 diagrams, TMB 3-diml, analysis of, 362 

 -fraction, diagrams at propdev positions, 358 

 bibliography on, 359, 360 

 effective, definition of, 615 

 formula of Aquino, 368 



Schoenherr, 369 

 graph of D. W. Taylor, 369 

 nominal, definition of, 615 

 ship-, estimate of, 368 

 patterns abaft ship-shaped bodies, 39 



around ships, references to, 39 

 persistence of, behind a ship, 261 

 -survey diagrams, definition sketch for, 366 

 torpedo, 366 



transom-stern ABC ship, 366 

 3-diml, 360-366 

 variations, behind ships, 259-262 



systematic, 572 

 vectors from model tests, 874 

 -velocity effect on appendage drag, 292 

 Water(s), added-mass coefficients for vibrating ships, 433 

 data for skegs in, 438 

 adequate flow to propdevs in confined waters, 668 

 air and, mechanical properties of, 915 

 confined, behavior in, first approx, 501 

 predicted, of a ship in, 389 

 change of trim data in, 328 

 definition of, 389 

 design factors for, 666 



features applicable, 659 

 drag, sinkage, squat, design for reduction, 661 

 effect(s), bibliography on, 415 



of lateral restrictions in subcritical range, 410 

 summary of, 414 

 estimated added-mass coeff for vibrating ship in, 



433 

 lack of reliable data on power and propeller 



performance in, 411 

 operation at supercritical speeds, 412 

 practical definition of, 389 

 predicting ship behavior in, 389 

 resistance curves of R. Brard for Suez Canal 



model, 413 

 running in, transverse section shapes for, 662 

 ship performance, unexplained anomalies in, 414 

 sinkage data in, 328 



speeds, economical and practical, in, 660 

 straight-element hull for use in, 666 

 deep-, resist and speed from shallow-water data, 400 

 depth, given, practical resist-speed cases involving, 396 

 2 per cent speed reduction in, 403 

 limiting, of D. W. Taylor, for ship trials, 407 



Water(s), -depth to square-draft ratio, 393 

 elastic characteristics of, 922 



flow through free-flooding spaces, resist due to, 323 

 fresh and salt, data on change of state, 921 

 kinematic-viscosity values of, 920 

 mass-densitj' values of, 917-919 

 mechanical properties of, 915 

 standard or reference values for, 915-920 

 inlet and discharge openings, design, 701 

 mechanical properties of, 915, 920 

 open, deep, change of trim and sinkage in, 325 

 restricted, definition of, 389 

 sea, chemical constituents of, 924 

 shallow, and restricted; see Water(s), confined 

 behavior in, first approx, 501 

 controllability model tests in, 876 

 definition of, 389 

 effect of, on speed and power, 390 



summary of, 414 

 estimated effect of lateral channel restrictions in 



subcritical range, 410 

 operation, modification to normal forms for, 666 

 quantitative effect on ship resistance and speed, 



390 

 resistance data, typical, 389 



found from deep-water data, 400 

 prediction by inspection, 408 

 section shapes for, 662 

 speed from deep-water data, 397 

 transverse dimensions for, 662 

 vessels, adaptation of straight-element form to, 

 666 



typical, 663 

 vibration problems in, 673 

 wave(s), data, 181 



relation to deep-water waves, 180 

 speed, definition of, 392 

 "standard", mass density, volumes, weight, 915 



reference data for, 915, 918, 920 

 vapor pressure of, 146, 147, 921 

 Waterline(s), afterbody, transom-stern ABC ship, 506 

 beam, maximum, fore-and-aft position, 481 

 curvature, 0-diml, of ABC ship, 507 



plots, 506 

 designed, fairing of for ABC ship, 200-202 

 first sketch of, 479 

 of ABC ships, 505 

 shape, 479 

 typical ships, 230 

 parallel, reference data on, 231 

 inclined, for variable-weight conditions, 499 



on saiUng yachts, data on, 784 

 length, first approx, 464 

 parallel, definition of, 230 



design lane for, 480 

 shapes and coefficients, designed, 228 

 slope, at entrance, graphs for, 479 



run, 480 

 stem shapes at various, 508 

 Waterplane^, coefficient, data for selecting, 478 



shape of vessel near designed, 504 

 WaveCs), actual wind, tabulated data for, 175 

 bibliography on, 182-185 

 complex, for design purposes, 171 



