摘要
Abstract
Based on the Reynolds averaged Navier-Stokes equation and SST turbulence model,CFD technology was used to conduct numerical simulation research on the pipeline system of the water jet propulsion device,and to analyze the inlet flow characteristics of the water jet propulsion device under different flow rates and unit layout distances.The research results show that under the same unit spacing,as the flow rate decreases,the flow velocity gradually decreases,the flow tubes between adjacent units gradually converge,the mutual influence decreases,the depth interference coefficient first decreases and then increases,and the width and area interference coefficients gradually decrease;Under the same flow conditions,as the distance between the two units increases,the mutual influence between the flow pipes gradually decreases,the depth interference coefficient changes gradually,and the amplitude of the change is small.The width and area interference coefficients both increase;Under the same unit layout spacing,as the flow rate decreases,when the spacing L=2D,the variation amplitude of the interference coefficient of the units decreases,indicating that the mutual interference between the two units is reduced.To ensure that water grabbing is not likely to occur and to meet the requirements of safe and stable operation of the unit,it is recommended to use a unit layout spacing of L=2D.关键词
喷水推进装置/管路系统/流管特性/水力性能/数值模拟Key words
water jet propulsion device/pipeline system/flow tube characteristics/hydraulic performance/numerical simulation分类
建筑与水利
