ABSTRACT

The hydrodynamic design of inland vessels mainly relies on resistance, propulsion, maneuvering, squat, and wash effects. From the propulsion point of view, inland vessels are mostly provided with a stern tunnel to overcome the limitations of the low draft by accommodating a propeller of larger diameter to have higher propulsive efficiency. The present work examines the influence of stern tunnel geometry on the resistance of an inland vessel in fully loaded and ballast conditions using model experiments and CFD investigations. Also, to ensure the propeller immersion in ballast conditions, the stern tunnel water entrainment properties are studied. Furthermore, to understand the stern tunnel-propeller interaction effects and propulsion coefficients, self-propulsion simulations using CFD are performed. The design study presented in this paper highlights the influence of stern tunnel configuration on the propulsion performance of an inland vessel in deep and shallow water.

摘要

内河船舶的水动力设计主要依靠阻力、推进、机动、下蹲和冲刷效应。从推进的角度来看，内河船舶大多设置艉隧道，通过容纳更大直径的螺旋桨来克服低吃水的限制，从而具有更高的推进效率。目前的工作使用模型实验和 CFD 调查研究了船尾隧道几何形状对满载和压载条件下内陆船舶阻力的影响。此外，为确保螺旋桨浸入压载条件下，研究了艉隧道的夹水特性。此外，为了了解船尾隧道-螺旋桨的相互作用效应和推进系数，使用 CFD 进行了自航模拟。