气液联合激振用于液压系统管路除污技术的研究

摘要

To study the feasibility of hydraulic pipe decontamination by a gas-liquid united technology,a gas-liquid united excitation system is developed based on the hydraulic excitation system.The experiment results show that a gas-liquid united oscillatory flow can be produced by mixing the gas pulse from a pulse generator and the hydraulic oil.Then,Euler-Euler two-fluid model has been adopted and the gas-liquid two-phase flow model is defined as Mixture Model by Fluent software.Meanwhile,by SIMPLE algorithm,the two-fluid control equations are solved by iterative numerical method.The simulation results show that the pulsation characteristics of two-phase flow have predictable decontamination effects on inner hydraulic piping pollutants,indicating that the controllability and the feasibility of the gas-liquid united excitation system.%为研究气液联合激振下液压系统管路除污的可行性，在液压激振系统的基础上，构建了气液联合激振系统，试验分析表明通过波动发生器产生的气脉冲与液压油混合后可产生脉动的气液联合振荡流。采用欧拉－欧拉双流体模型，通过 Fluent 软件将气液两相流定义为 Mixture 模型，利用 SIMPLE 算法对双流体控制方程组进行了迭代求解。数值模拟表明，两相流混合后的脉动特性对液压系统管道污染物的剥离具有可预见的技术效果，从而说明了气液联合激振的可控性与可行性。