基于Fluent和FENSAP-ICE的极区海洋平台甲板结构结冰数值模拟

NUMERICAL SIMULATIONS OF DECK STRUCTURE ICING ON POLAR OFFSHORE PLATFORMS BASED ON FLUENT AND FENSAP-ICE

极区自然资源丰富却气候恶劣,海洋平台在此地区作业时甲板表面极易出现结冰现象。针对极区海洋平台甲板结构结冰问题,采用Fluent与FENSAP-ICE软件相结合的方法,分析在过冷雾和过冷雨条件下,距海面高度和结构特征长度对甲板结构结冰的影响。结果表明:当特征风速为5 m·s^−1、6 m·s^−1和7 m·s^−1时,在风速不变的条件下,随着距海面高度由2 m增加到20 m,结构表面的平均结冰厚度均逐渐增加且结构表面的结冰相对增长率逐渐减小;在特征风速为5 m·s^−1条件下,在距海面高度为20 m和80 m处,随着结构特征长度由1 m增加到30 m时,结构表面的平均结冰厚度均逐渐减小且减少程度逐渐减缓。

The polar region is rich in natural resources,but the climate is harsh.The deck surface of offshore platforms in this region is prone to icing,which is dangerous.To investigate factors affecting the icing of deck structures on polar marine platforms,a combination of the software programs Fluent and FENSAP-ICE was used to analyze the influence of sea surface height and structure length on deck icing under conditions of supercooled fog and rain.The results showed that when characteristic wind speeds were 5 m·s^−1,6 m·s^−1 and 7 m·s^−1,average ice thickness on the structure surface increased gradually with height from 2 m to 20 m and the relative growth rate of ice on the structure surface decreased gradually.Additionally,when characteristic wind speed was 5 m·s^−1 at altitudes of 20 m and 80 m above sea level,the length of the structure increased from 1 m to 30 m,and average ice thickness on the structure surface and degree of reduction decreased.