河北工业科技2018，Vol.35Issue(2)：98-103,6.DOI:10.7535/hbgykj.2018yx02004
局部反循环打捞装置数值模拟
Numerical simulation of local reverse circulation salvage device
摘要
Abstract
In order to make clear the mechanism of reverse circulation formation by conventional partial reverse circulation washing device in underground and the cause of the unsatisfactory washing effect at present,as well as to solve the problem of low chip extraction rate in the application process,computational fluid dynamics method is used to establish the calculation model of solid-liquid two-phase flow field of hole bottom in the washing operation of the device,and the pressure field distribu-tion,the velocity field distribution and the turbulence characteristics of the liquid phase washing media in the process of flush debris are analyzed.The simulation calculation shows that the pressure,flow velocity and turbulent kinetic energy dissipation of liquid phase washing media mainly occurr in the process of twice reversing in the outlet hole before entering the hole bottom flow field,reducing the ability to clean the debris in the middle of the hole,and causing part of the debris trapped in the middle of the hole.In order to improve the washing effect of reverse circulation well washing device,the structure of the bottom outlet hole can be improved,shifting downward the lower outlet hole position appropriately or reducing the diameter of outlet hole, increasing the flow rate of the washing medium at the bottom of the hole to improve the carrying capacity of the well washing medium to the debris.The research results may provide reference for the optimal design of the local reverse circulation salvage device.关键词
计算流体力学/反循环洗井/数值模拟/固液两相流/碎屑提取率Key words
computational fluid dynamics/reverse circulation washing well/numerical simulation/solid-liquid two-phase flow/extraction rate of debris分类
能源科技引用本文复制引用
王春生,何振楠,徐玉建,杨富祥..局部反循环打捞装置数值模拟[J].河北工业科技,2018,35(2):98-103,6.基金项目
国家自然科学基金 (21076043) （21076043）
