16000 TEU甲醇双燃料船泵舱通风数值模拟

Numerical Simulation Study on Ventilation of Pump Compartment of Methanol-Fueled 16000 TEU Ship

以某16000 TEU甲醇双燃料船为例,基于计算流体力学(Computational Fluid Dynamics,CFD)仿真分析软件Star CCM+对其泵舱通风系统进行数值模拟。采用VOF(Volume Of Fluid)多相流数值方法计算分析泄漏甲醇的体积变化规律,研究不同射流速度下泵舱内空气达到安全阈值所需时间。研究结果表明:在现有通风系统作用下,114.74 s内可使泵舱内的甲醇质量浓度降低至安全阈值(200 mg/L)以内;当射流速度为0.5 m/s时,泵舱的通风效果最佳,能使通风达标所需时间缩短2%;射流流速过大会引发流场扰动,部分甲醇气体被吹入死角,不利于舱室通风。

Based on the Computational Fluid Dynamics(CFD)software Star CCM+,a numerical simulation of ventilation of the pump compartment of a methanol-fueled 16000 TEU ship is carried out.The volume change law of leaked methanol is derived by Volume Of Fluid(VOF),and the time required for the air in the pump compartment to reach the safety threshold at different jet velocities is studied.The research results show that with the existing ventilation system on the ship,the air in the pump compartment can reach the methanol safe threshold of 200 mg/L within 114.74 s.The ventilation effect is best when the jet velocity is 0.5 m/s,which shortens the time required for ventilation to meet the standard by 2%.When the jet velocity is too high,it will cause flow field disturbance,and some methanol gas will be blown into dead spaces and,hence,lower the ventilation effectiveness.