Numerical Study on Motion and Added Resistance for Ship Advancing in Head Waves in Shallow and Narrow Waterways
Ship hydrodynamics are under the effects of water depth and side wall in shallow and narrow waterways.In this paper,a DTC ship model is taken as the study object and STAR-CCM+is used as the CFD solver for viscous flow to carry out the numerical study on the ship motion and added resistance in head waves in finite water depth by RANS method.Based on the validation of the numerical method for benchmark cases,ship vertical motion responses and added resistance in head waves for a series of wavelengths in a shallow and narrow waterway of the same width as the towing tank and in an open shallow waterway are numerically calculated.Results indicate that the ship motion and resistance in the lower wave frequency range are nonlinear,and the increase in pressure resistance contributes most to the added resistance in waves.In the lower wave frequency range,side wall effects the linear motion response significantly,and results in the nonlinearity and local extreme values of added resistance in waves,but it has an insignificant effect on the higher-order components of ship motion and resistance.
shallow and narrow waterwaysside wallhead wavesmotion responseadded resistance in wavesnonlinearityCFD
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