Numerical investigation of the parameters that may seriously impact the ship control lability in restricted bending channels. (15th December 2022)

• Record Type: Journal Article
• Authors: Yang, Bo; Kaidi, Sami; Lefrançois, Emmanuel
• Is Part Of: Ocean engineering. Volume 266(2022) Part 1
• Publication Date: 2022-12-15
• Subjects: CFD simulations -- Bending channel -- Inland navigation -- Restricted waterways -- Ship hydrodynamics; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2022.112735
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: Inland waterway transport is now playing a significant role thanks to its various advantages over the other transportation modes, for example, low cost, low environmental pollution, and large capacity, etc. However, inland waterways are not only naturally curved but also narrow and shallow, which causes complex flow environments and navigational conditions. Inland ships are consequently susceptible to accidents in restricted curved waterways. Especially during these years, this mode of transport has seen significant progress by the arrival of the new generation of ships (larger size and more powerful), and this makes ships' maneuverability in such sensitive waters severer. The aim of the present work is firstly to well understand the flow behaviors around a ship in bending zones, and secondly to study the variation of hydrodynamic forces (bank cushion and suction phenomena) in these zones. To conduct this investigation, the CFD model based on an unsteady Navier-Stokes solver in STARCCM+ is used. The verification and validation of this model are realized by respecting the ITTC recommendations. The latter is then used to perform a series of simulations by testing the following parameters: channel angle, water depth to draft ratio, ship speed, channel bottom width and drift angle on ship hydrodynamics in restricted curved fairways. The obtained results of this work provide an interesting idea about the ship's hydrodynamics variation and characterize the parameters that seriously impact the ship controllability in restricted bending channels. Highlights: CFD method was used to simulate the flow behaviors around the ship in bending zones for different operational configurations. Relative frame motions were applied to the computational domains. The pressure around the ship in curves will increase with h/T ratio reducing, which is opposite to the shallow water effect. Sway force is the most sensitive to the changes in restricted curved configurations, where Gaussian trend can be noticed.