养殖工船排水管路内颗粒流动特性研究  

Study on flow characteristics of particles in drainage piping of aquaculture ship

作　　者：高瑞 黄文超[1,2] 张彬 GAO Rui;HUANG Wenchao;ZHANG Bin(Fishery Machinery and Instrument Research Institute,Chinese Academy of Fishery Sciences,Shanghai 200092,China;Joint Laboratory for Deep Blue Fishery Engineering,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,Shandong,China)

机构地区：[1]中国水产科学研究院渔业机械仪器研究所,上海200092 [2]青岛海洋科学与技术国家实验室深蓝渔业工程联合实验室,山东青岛266237

出　　处：《渔业现代化》2021年第4期61-69,共9页Fishery Modernization

基　　金：山东省支持青岛海洋科学与技术试点国家实验室重大科技专项(2018SDKJ0303-3)。

摘　　要：鱼类的排泄物及残饲等颗粒物易在管路中沉积造成堵塞,从而影响养殖水舱内水体清洁,并对鱼类造成不利影响。基于拉格朗日两相流数值模拟技术对排水管路内颗粒物流动特性进行仿真,通过矿浆泵管路提升试验结果标定了合适的湍流模型及计算方案,并据此开展分析研究。重点分析了颗粒物在不同粒径、不同进水流速、不同管径下的流动特性。结果显示:针对排水管路内的颗粒物流动问题,SST k-ω湍流模型具有较高的准确性;颗粒大小对流动影响非常明显,当颗粒足够小时,流体湍动、曳引、萨夫曼力等影响占据主导作用,而当颗粒达到一定大小后,重力则成为主要影响因素;就沉积情况而言,颗粒粒径影响最大,管路进口流速次之,管径的影响最小。Particles such as fish excretion and residual feed are easy to deposit in the pipeline and cause blockage,thus affecting the cleaning of water in aquaculture tank and causing adverse effects on fish.Based on the numerical simulation of Lagrangian two-phase flow,the flow characteristics of particles in drainage piping are simulated,the suitable turbulence model and calculation scheme are calibrated based on the slurry pump pipe lifting test results,and the analysis and research are carried out accordingly.The flow characteristics of particles under different particle size,flow velocity and pipe diameter are analyzed.The results show that the SST K-ωturbulence model has high accuracy for the particle flow in the drainage piping.The influence of particle size on flow is very obvious.When the particles are small enough,the turbulence,drag and saffman force play a dominant role.When the particles reach a certain size,gravity becomes the main factor.For particle deposition,the influence of particle size is the largest,followed by inlet velocity,and the influence of pipe diameter is the least.

关 键 词：排水管路 颗粒物 流动特性 养殖工船 深远海养殖 速度云图 颗粒分布 

分 类 号：S965.3[农业科学—水产养殖]