Accession Number : ADA155197


Title :   Calculation of Viscous Effects on Ship Wave Resistance Using Axisymmetric Boundary Layer Approaches


Descriptive Note : Interim rept. Jan-Dec 1984


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC


Personal Author(s) : Wang, H T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a155197.pdf


Report Date : 13 May 1985


Pagination or Media Count : 44


Abstract : This report investigates the effect of fluid viscosity on ship wave resistance for a wide range of ship hulls. Two direct, simple models are used to model the potential flow around the hull: Michell thin-ship theory and zeroth order slender ship theory. The viscous flow is modeled by two relatively simple integral boundary layer methods, both of which approximate the actual hell by axisymmetric bodies. The various methods are used to calculate wave resistance for a series of speeds for five ship hulls, three of which have extensive experimental data. The results basically show that the trend of the viscous correction is to improve the agreement of the calculated and measured values. For the thicker ship hull cases, the results indicate that a more complex potential flows wave resistance theory is required to obtain reasonable agreement with measured results.


Descriptors :   *BOUNDARY LAYER , *SHIP HULLS , AXISYMMETRIC , CORRECTIONS , FLUIDS , MATHEMATICAL MODELS , POTENTIAL FLOW , RANGE(EXTREMES) , RESISTANCE , SHIPS , SLENDER BODIES , VISCOSITY , VISCOUS FLOW , WATER WAVES , WAVES


Subject Categories : Marine Engineering
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE