转盘式网箱清洗装置设计与模拟试验  

Design and simulation test of rotating disc cage cleaning device

作　　者：满晓东 宋协法[1] 黄志涛[1] 董登攀[1] MAN Xiaodong;SONG Xiefa;HUANG Zhitao;DONG Dengpan(College of Fisheries,Ocean University of China,Qingdao 266003,Shandong,China)

机构地区：[1]中国海洋大学水产学院

出　　处：《渔业现代化》2019年第6期22-28,共7页Fishery Modernization

基　　金：山东省科技重大专项“深远海鱼类养殖专用设备研制(2018CXGC0106)”

摘　　要：在网箱养殖过程中,网衣附着物的产生影响了网箱内部水流交换和鱼类的正常生长。设计了一套转盘式网箱清洗装置,用于解决网衣附着问题。根据选取的水泵(额定流量Q额=30 L/min、额定压力p额=20 MPa),应用连续性方程和伯努利方程,通过水力学计算并使用流量测速法进行实物样机试验,确定了清洗盘的最优喷嘴直径d=0.6 mm,其射流速度v=196.41 m/s、射流压力p=19.3 MPa。运用基于有限体积法的计算流体力学软件FLUENT对高压水射流场进行数值模拟分析,确定清洗盘与网衣的最大工作距离为10.3 mm;验证了使用Realizable k-ε湍流模型可以精确地计算此射流工况下的水动力学参数。结果表明,设计的网箱清洗装置可以满足网衣清洗需求,为网箱清洗装置的设计和优化提供参考。In the process of cage aquaculture,attachments on netting affect water exchange and normal growth of fish in cages.A rotating disc cage cleaning device was designed to solve the problem of attachments on netting.With the selected pump(rated flow QR=30 L/min,rated pressure pR=20 MPa),continuity equation and Bernoulli equation were applied for prototype test through hydraulic calculation and with flow velocity method to determine that the optimum nozzle diameter of the cleaning discs d=0.6 mm,the jet velocity v=196.41 m/s and the jet pressure p=19.3 MPa.The computational fluid dynamics software FLUENT based on the finite volume method was used to carry out the numerical simulation analysis of the high pressure water jet field,and the maximum working distance between the cleaning discs and the netting was determined to be 10.3 mm;it was verified that the hydrodynamic parameters of this jet could be accurately calculated by using the Realizable k-εturbulence model.The results show that the designed cage cleaning device can meet the netting cleaning requirements,which provides references for the design and optimization of cage cleaning device.

关 键 词：网箱清洗装置 清洗盘 喷嘴 水力学 数值模拟 

分 类 号：S969[农业科学—水产养殖]