耙腔流场分析与结构优化  

Flow field analysis and structure optimization of drag cavity

作　　者：陈浩 孙守胜 李章超 王晓萌 张路生 CHEN Hao;SUN Shou-sheng;LI Zhang-chao;WANG Xiao-meng;ZHANG Lu-sheng(CCCC Tianjin Dredging Co.,Ltd.,Tianjin 300461,China;Tianjin Key Laboratory for Dredging Engineering Enterprises,Tianjin 300457,China;China Communications(Tianjin)Dredging Engineering Co.,Ltd.,Tianjin 300450,China)

机构地区：[1]中交天津航道局有限公司,天津300461 [2]天津市疏浚工程技术企业重点实验室,天津300457 [3]中交(天津)疏浚工程有限公司,天津300450

出　　处：《水运工程》2023年第S02期43-48,共6页Port & Waterway Engineering

摘　　要：针对耙吸挖泥船的耙头在挖掘黏土时,其内部流场情况不明晰的问题,本文对耙腔内部流场进行了仿真计算、分析及优化。采用计算流体动力学(CFD)值模拟计算技术,分析新老耙头的总压差、静压差及截面流速的变化情况。得出设置反弧形导流板后,腔体内部漩涡区域减少,能量损失降低,清水流动性能提高。结果表明:新耙头内部设置流线型腔体,可使流动平顺,输送阻力降低,截面流速趋于合理。其各项性能均优于老耙头。Regarding the problem that the internal flow field of the draghead of the rake suction dredger is not clear when excavating clay, the flow field in the drag cavity is simulated, analyzed and optimized. The change of total pressure difference, static pressure difference and cross section velocity of the new and old dragheads are analyzed by using Computational Fluid Dynamics(CFD)value simulation calculation technique. The results show that the vortex area in the drag cavity is reduced, the energy loss is reduced, and the flow performance of clean water is improved. The conclusions are that the streamlined internal cavity of the new draghead makes the internal flow smooth, the transport resistance is reduced, and the cross section velocity tends to be reasonable. Its performance is better than the old draghead.

关 键 词：耙头 耙腔 流场 导流板 

分 类 号：U616[交通运输工程—船舶及航道工程]