基于VOF模型的真空引水罐内流动特性  

Research on flow characteristics inside vacuum tank based on VOF model

作　　者：王欢[1] 赵睿杰[1] 李红[1] 杨帆[1] 潘绪伟 WANG Huan;ZHAO Ruijie;LI Hong;YANG Fan;PAN Xuwei(National Research Center of Pumps,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013

出　　处：《排灌机械工程学报》2025年第1期74-79,共6页Journal of Drainage and Irrigation Machinery Engineering

基　　金：江苏省重点研发计划(现代农业)项目(BE2021340)。

摘　　要：为解决真空引水罐出口气体流出问题,探究罐内气液两相流动机理,基于RNG k-ε湍流模型和VOF模型对真空引水罐进行计算,对不同初始状态下真空引水罐内的气液两相交界面形态、出口管气体流出量以及出口管内流动状态进行分析,讨论了真空引水罐内初始状态对罐内流场的影响,总结了罐内水位对内部流场及出口管的作用关系.结果显示:当初始水位远高于进水管时会大幅优化真空引水罐内流场;与原初始水位相比,罐内气液两相交界面的交互作用减少;气体流出量体积分数峰值从最初的6.916%降至0.106%,平均值从3.442%降至0.027%;出口管流态得到明显改善,顶部低压区域减少.研究结果表明初始水位的变化会影响真空引水罐内流场特性、气体流出量及出口管流态,为深入认识真空引水罐内部流动及真空引水罐的设计提供了数据支撑.To address the issue of gas outflow from the outlet of a vacuum tank and to explore the underlying mechanism of gas-liquid two-phase flow within vacuum tank,the RNG k-εturbulence model and Volume of Fluid(VOF)model were employed.Analyses were conducted on the gas-liquid interface morphology,gas discharge percentage at the outlet pipe,and flow conditions under different initial conditions.The influence of initial conditions on the internal flow field was investigated,and the relationship between water level and internal flow field/outlet pipe characteristics was examined.Results indicate that when the initial water level is significantly higher than the inlet pipe,the internal flow field of the vacuum tank is substantially optimized.Compared with the original initial water level,the interaction at the gas-liquid interface is reduced.The peak gas discharge percentage decreases from 6.916%to 0.106%,with the average value decreased from 3.442%to 0.027%.The flow pattern in the outlet pipe has been significantly improved,and the low-pressure regions at the top has decreased.Research findings demonstrate that variations in initial water level can affecte the flow field characteristics,gas discharge volume,and outlet pipe flow patterns within the vacuum tank,providing data support for a deeper understanding of internal flow dynamics and vacuum water tank design.

关 键 词：引水罐 流体体积模型 罐内水位 罐内流场 出口流态 

分 类 号：S277.9[农业科学—农业水土工程]