NUMERICAL STUDY ON HYDRODYNAMIC BEHAVIOUR OF SHIPS SAILING IN LOCKS

摘要

In this paper, the CFD software FLUENT is used to numerically predict the hydrodynamic force and moment acting onrnan unappended ship passing through a lock. The unsteady RANS equations in conjunction with a RNG k-ε turbulencernmodel are solved. UDF is compiled to define the ship motion. Meanwhile, grid regeneration is dealt with by using therndynamic mesh method and sliding interface technique. Under the assumption of low ship speed, the influences of freernsurface elevation and ship squat are neglected in the numerical simulation. We focus on the comparisons of thernnumerical results with the benchmark model test data obtained at Flanders Hydraulics Research. Numerical calculationrnis carried out for the cases of model test to investigate the behaviour of vessels transiting in the Pierre Vandamme Lockrnin Zeebrugge. By analyzing the numerical results obtained under different testing conditions such as water depth andrneccentricity, and comparing the results with the benchmark model test data, we can verify the effectiveness of thernnumerical method and analyze the influences of various factors on ship hydrodynamic behaviour in locks. The numericalrnmethod proposed in this paper can qualitatively predict the ship-lock hydrodynamic interaction. It can provide certainrnguidance on safe manoeuvring and control of ship sailing in lock.