基于CFD 的直接进气系统在船舶上的研究与应用  

Research and Application of Direct Air Intake System on Ships Based on Computational Fluid Dynamics

作　　者：冯树才 曲东旭 陈彦臻 李智 FENG Shucai;QU Dongxu;CHEN Yanzhen;LI Zhi(Marine Design&Research Institute of China,Shanghai 200011,China)

机构地区：[1]中国船舶及海洋工程设计研究院,上海200011

出　　处：《船舶》2023年第4期97-104,共8页Ship & Boat

摘　　要：为进一步降低船舶能耗,该文以某大型散货船为研究对象,提出直接进气系统的设计方案。基于计算流体力学(computational fluid dynamics,CFD)数值模拟法,对设计的合理性进行分析,并对直接进气系统在实船上的应用进行探讨。理论分析与实船验证结果表明:进气风道内流速与设计流速相符,直接进气系统总阻力远低于许用限制值,通过增压器的自吸能力可直接吸入舷外空气,系统设计合理;应用该系统后,主机、辅机油耗降低,机舱风机运行总能耗降低50%,初始投资回收周期短,可降低船舶运营成本。A design scheme of the direct air intake system of a large bulk carrier is proposed in order to reduce the energy consumption of the ship.The rationality of the design is analyzed by numerical simulation based on the computational fluid dynamics(CFD).And the application of the direct air intake system on the ship is also discussed.Theoretical analysis and ship trial show that the flow velocity in the intake duct is consistent with the designed flow velocity,and the total resistance of the direct intake system is much lower than the allowable limit value.The outboard air can be directly inhaled through the self-absorption capacity of the turbocharger,and the system design is reasonable.By applying this system,the fuel consumption of the main engine and auxiliary engine is reduced,the total energy consumption of the fan in the engine room is reduced by 50%,and the initial investment recovery cycle is short with reduced cost of ship operation.

关 键 词：直接进气系统 计算流体力学 数值模拟 实船应用 船舶运营成本 

分 类 号：U664.86[交通运输工程—船舶及航道工程]