Restricted waters present several challenges for ship builders and operators. The proximity of the seabed and river or canal banks cause viscous effects to be more pronounced than in unrestricted waters. These effects do not follow a linear scaling law, which is typically assumed in terms of sinkage and trim. Moreover, the resistance of the ship is increased in a complex fashion, which has largely eluded researchers. The present study will aim to elucidate scale effects in shallow water performance predictions. Particular attention is placed on the form factor, wave resistance, and frictional resistance. Scale effects are confirmed in the two former parameters. Justification for the obtained results is sought in terms of flow properties. Specifically, the flow velocity and boundary layer thickness are examined in detail. The selected case-study reflects recent experimental work on the KCS hull form in restricted waters.

禁水区给船舶制造商和经营者带来了一些挑战。与不受限制的水域相比，海床和河流或运河两岸的靠近引起的粘滞效应更加明显。这些影响不遵循线性比例定律，通常根据下沉和修剪来假定。而且，船的阻力以复杂的方式增加，这在很大程度上已经使研究人员望而却步。本研究旨在阐明浅水性能预测中的水垢效应。尤其要注意形状因数，波阻和摩擦阻力。比例效应在前两个参数中得到了确认。在流动性方面寻求获得的结果的合理性。具体地，详细检查流速和边界层厚度。