高压气液脉冲两相流运动学建模与仿真分析

Kinematic Modeling and Simulation Analysis for High Pressure Gas-liquid Two-phase Flow Based on Pulse

提出一种通过气路和液路交替通入高压脉冲流体,形成两相振荡流对液压系统管道内壁的污染物进行去除的气液耦合激振方式。设计了气液脉冲试验系统,建立了高压气液脉冲两相流动力学模型,利用ANSYS中的FLUENT模块进行了仿真分析。采用κ-ε二方程湍流模型,气液两相流模型采用VOF模型,用SIMPLE算法对双流体控制方程组进行迭代求解,对气液脉冲两相流的压力场、速度场及流态进行了分析,为气液两相流激振的可控性提供了参考。

A gas-liquid coupling excitation method was proposed to remove the pollutant from the inner wall of the pipeline by the pulsating fluid passing through the alternating gas path and the liquid path. The gas-liquid pulse test system was designed and the dynamic model of high-pressure gas-liquid pulsed two-phase flow was established. The simulation was carried out by using FLUENT module in ANSYS. Using the κ-ε two-equation turbulence model, the VOF model was selected for the gas-liquid two-phase flow model, and the SIMPLE algorithm was used to solve the two-fluid control equations. The analyses of the curves and its cloud charts show that the pressure and its fluctuation of the mixed fluid increase with the increase of the initial mixing pressure of the gas-liquid two-phase flow. So, it provides a theoretical basis for the online cleaning of the complex hydraulic system and some theoretical basis of the new gas-liquid coupling excitation is presented.