Session: 07-04-01 Vessels in Ice - Simulations

Paper Number: 78558

78558 - Numerical Research on the Resistance Performance of a Ship Under Pack Ice Conditions 

Numerical Research on the Resistance Performance of a Ship Under Pack Ice Conditions

Xiang-Jie Tang ^a   Ming Zou ^a   Lu Zou ^a,b Zao-Jian Zou ^a,b

^a School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;

^b State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

 

ABSTRACT

Global warming has caused a dramatic change of the environment in polar regions, resulting in an obvious transition from the level-ice coverages to pack ice fields. The changed condition makes polar transportations more possible, with numerous waterways opening for the ships travelling in the Artic region. For ships navigating in waterways covered by pack ices, the ice resistance prediction is a critical issue in the design and construction process, which is directly related to the safety of the ship, and it is of great significance to the research of ship propulsion efficiency. In order to simulate the ship-ice interaction under such pack ice conditions, this paper adopts coupled numerical methods: the fluid flow is solved by Computational Fluid Dynamics (CFD) method, while the governing equation of ice and the ship-ice/ice-ice collisions are simulated by the Discrete Element Method (DEM). Specifically, the DEM-based ice particles and pack ice field are established according to the model test conditions and parameters in a published reference. In addition, this method is also capable of building a random pack ice field. The comparison between the present results and the model test date of three concentrations of pack ice (60%, 80% and 90%) and the results of another reference study by the Finite Element Method under the same conditions shows that the model established in this paper indicates higher accuracy in predicting ice resistance. On this basis, the influence of ship speed, ice thickness and pack ice diameter on the ice resistance is investigated.

KEY WORDS: Pack ice; Ship resistance; Computational fluid dynamics; Discrete element method.

Presenting Author: Tang Xiang-Jie Shanghai Jiao Tong University

Authors:

Tang Xiang-Jie Shanghai Jiao Tong University
Zou Ming Shanghai Jiao Tong University
Zou Lu School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University
Zou Zao-Jian School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University