Experimental And Simulation Study Of Gas Evolution And Dissolution Process

In hydraulic system, the pressure of flowing liquid cause gas evolution and dissolution, resulting in bubble and cavitation generation and collapse. Generation of bubbles and cavitation in turn affects hydraulic pressure changes in the system. Sudden changes in pressure impact the hydraulic systems working capacity and can damage the components. In addition, the separation effect of gas-liquid separation technology is mainly determined by the relevant parameters in the process of gas dissolution and evolution. Therefore, it is necessary to study the process of gas dissolution and evolution in this paper.This topic is aiming to simulate and study the gas dissolution and evolution in liquid.The main contents are as follows:(1). Based on Henry's law in fluid mechanics and ideal gas law, the mathematical model of gas dissolution and evolution is built and derive the basic equation of gas solubility in liquid is derived.(2). Based on MATLAB simulation software, the mathematical model is simulated and analyzed. In simulation study, the simulation curves of the gas dissolved and precipitated pressure and the dissolved gas volume in the liquid are obtained by changing the initial equilibrium pressure, gas-liquid volume ratio and gas solubility of the solution liquid surface.(3). Experimental testing platform is built and the test process is accelerated using the electric vibration system. Then the optimization and improvement of the test platform are put forward by the error analysis of the experimental data. Finally, the test program and test steps are improved.(4). Pressure are obtained under different test conditions in anti-wear hydraulic oil,industrial gear oil and pure water by experimental study on dissolution and evolution of gas. Simultaneously, the gas dissolution and evolution time constants for each solution at different gas-liquid volume ratios are determined by pressure change curve. Finally,according to the measurement of air solubility in the liquid, pressure test curve in the gas dissolution and evolution process and simulation curve are compared.In this paper, the mathematical model of pressure and dissolved gas volume during gas dissolution and evolution is proposed, and the influencing factors of the model are simulated. The gas dissolution and evolution test process is accelerated by an electric vibration system of the test platform. The correctness of the study is verified by comparing the results of the simulation and analysis of the pressure in the process of gas dissolution and evolution. At the same time, the gas dissolution and evolution time constants of different liquids under the condition of changing the gas-liquid volume ratio were determined by the experimental data, which set the foundation for the study of under bubble model in hydraulic pipeline.