ABSTRACT

Liquefied natural gas (LNG) exhibits significant environmental advantages. However, the hazards of LNG-fuelled ships need to be investigated in their early design stages, particularly with regard to accidental fuel leakage. In this study, a hypothetical oil tanker model was used with a fuel gas supply system installed on the main deck; the objective was to establish a critical zone for natural gas dispersion. A probabilistic approach was applied to determine credible scenarios, and leak size, location, and direction were considered as parameters along with environmental parameters such as wind direction and speed. Computational fluid dynamics was used to present the critical zone in terms of the contours of the natural gas concentration. The simulation results indicated that the leak size and wind speed significantly influence the size of the critical zone.

摘要

液化天然气 (LNG) 具有显着的环境优势。然而，LNG 燃料船舶的危害需要在其早期设计阶段进行调查，特别是在意外燃料泄漏方面。在这项研究中，假设油轮模型与安装在主甲板上的燃气供应系统一起使用；目的是建立一个天然气分散的临界区。应用概率方法来确定可信的场景，泄漏大小、位置和方向与风向和风速等环境参数一起被视为参数。计算流体动力学用于根据天然气浓度的轮廓呈现临界区。