Accession Number : AD0760334

Title :   Measurement of Wave Resistance in Water of Finite Depth by Wave-Pattern Analysis.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA UNIV BERKELEY COLL OF ENGINEERING

Personal Author(s) : Chen,Kenneth Keh-Ya

Report Date : MAR 1973

Pagination or Media Count : 102

Abstract : Longitudinal-cut wave-pattern analysis is used to obtain the wavemaking resistance in water of finite depth. By considering the momentum flux through certain control surfaces, a resistance formula can be derived in terms of values of the potential function on a plane behind the ship and perpendicular to the direction of motion or alongside and parallel to this direction. Furthermore, by using the linearized wave theory the resistance can be expressed explicitly in terms of the spectrum of the recorded wave profiles. The wave profiles were measured in model tests carried out for three water depths H/L = 0.125, 0.1583 and 0.2667. The test speed covered both the subcritical and supercritical speed ranges. The total resistance was also measured simultaneously. (Author)

Descriptors :   (*SHIP HULLS, HYDRODYNAMICS), OCEAN WAVES, MODEL TESTS, VELOCITY, POWER SPECTRA, MODEL BASINS, EXPERIMENTAL DATA, DATA PROCESSING, NAVAL RESEARCH

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE