摘要
Abstract
In order to meet the demand for automatic fishing equipment in Antarctic pelagic fisheries,this study focu-ses on the analysis of the characteristics and development of the internal backflow,vortex and velocity of the fish pump under three different flow rates(0.8 m/s,1.2 m/s,1.6 m/s).Based on the Realizable k-ε control equation and the VOF turbulence model,a three-dimensional numerical model of the gas-water two-phase flow in the fish tank of the fish pump was established.In the steady numerical calculation of gas-liquid two-phase flow,through the static pressure distribution and velocity field distribution of the internal flow field of the fish tank,it is determined that the flow law is reasonable and conforms to the basic theory of physics.The simulation results show that when the de-signed flow rate of liquid is between 0.8 m/s and 1.6 m/s,the fluid trace of the Antarctic krill suction pump is smooth,without obvious vortex and turbulent flow,which can effectively reduce the impact of krill on the wall surface and is suitable for the non-destructive transportation of Antarctic krill.When the designed liquid flow rate exceeds 1.6 m/s,the fish body damage rate is relatively high.The research results show that this paper can provide a refer-ence for the optimization of vacuum fish pump for ocean fishing.[Chinese Fishery Quality and Standards,2025,15(2):43-48].关键词
远洋捕捞/南极磷虾/真空式吸鱼泵/VOF/数值模拟Key words
Pelagic fishing/antarctic krill/vacuum suction fish pump/vof/numerical simulation分类
农业科技
