Two-Dimensional Numerical Simulation of Flow Around Three-Stranded Rope  

作　　者：WANG Xinxin WAN Rong HUANG Liuyi ZHAO Fenfang SUN Peng 

机构地区：[1]Laboratory of Fisheries Engineering, Fisheries College, Ocean University of China [2]National Engineering Research Centre for Oceanic Fisheries, Shanghai Ocean University

出　　处：《Journal of Ocean University of China》2016年第4期627-636,共10页中国海洋大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (31072246, 30972256);Special Fund for Research on high efficient techniques for Antarctic Krill (20150256);Agro-Scientific Research in the Public Interest (201203018, 201303050-02);the Fundamental Research Funds for Chinese Academy of Fishery Sciences (CAFS) (2012A1301)

摘　　要：Three-stranded rope is widely used in fishing gear and mooring system. Results of numerical simulation are presented for flow around a three-stranded rope in uniform flow. The simulation was carried out to study the hydrodynamic characteristics of pressure and velocity fields of steady incompressible laminar and turbulent wakes behind a three-stranded rope. A three-cylinder configuration and single circular cylinder configuration are used to model the three-stranded rope in the two-dimensional simulation. The governing equations, Navier-Stokes equations, are solved by using two-dimensional finite volume method. The turbulence flow is simulated using Standard κ-ε model and Shear-Stress Transport κ-ω(SST) model. The drag of the three-cylinder model and single cylinder model is calculated for different Reynolds numbers by using control volume analysis method. The pressure coefficient is also calculated for the turbulent model and laminar model based on the control surface method. From the comparison of the drag coefficient and the pressure of the single cylinder and three-cylinder models, it is found that the drag coefficients of the three-cylinder model are generally 1.3–1.5 times those of the single circular cylinder for different Reynolds numbers. Comparing the numerical results with water tank test data, the results of the three-cylinder model are closer to the experiment results than the single cylinder model results.Three-stranded rope is widely used in fishing gear and mooring system. Results of numerical simulation are presented for flow around a three-stranded rope in uniform flow. The simulation was carried out to study the hydrodynamic characteristics of pressure and velocity fields of steady incompressible laminar and turbulent wakes behind a three-stranded rope. A three-cylinder configuration and single circular cylinder configuration are used to model the three-stranded rope in the two-dimensional simulation. The governing equations, Navier-Stokes equations, are solved by using two-dimensional finite volume method. The turbulence flow is simulated using Standard κ-ε model and Shear-Stress Transport κ-ω（SST） model. The drag of the three-cylinder model and single cylinder model is calculated for different Reynolds numbers by using control volume analysis method. The pressure coefficient is also calculated for the turbulent model and laminar model based on the control surface method. From the comparison of the drag coefficient and the pressure of the single cylinder and three-cylinder models, it is found that the drag coefficients of the three-cylinder model are generally 1.3–1.5 times those of the single circular cylinder for different Reynolds numbers. Comparing the numerical results with water tank test data, the results of the three-cylinder model are closer to the experiment results than the single cylinder model results.

关 键 词：cylinder turbulent Reynolds turbulence laminar circular hydrodynamic governing incompressible Navier 

分 类 号：S971.3[农业科学—捕捞与储运]