气体溶解和析出的仿真与试验研究

发布时间：2018-04-30 17:14

本文选题：压力曲线 + 气体溶解和析出时间常数　；参考：《电子科技大学》2017年硕士论文

【摘要】：在液压系统中,由于压力的变化导致液体中发生气体溶解和析出过程,从而出现气泡和气穴的产生及破灭现象,而气泡和气穴的产生及破灭不但会引起系统的压力变化,对组成系统的元件产生破坏及失效,最终致使系统的工作性能下降。此外,在石油化工设计和生产中,气液分离技术的分离效果主要由气体溶解和析出过程中相关参数决定。因此本课题对气体溶解和析出过程进行研究是十分必要的。本课题是对液体中气体溶解和析出现象进行仿真与试验研究,其主要内容为:(1).根据流体力学中的亨利定律和理想气体状态方程构建气体溶解和析出过程的数学模型以及推导气体在液体中溶解度的基本方程。(2).基于MATLAB仿真软件,对所构建的数学模型进行仿真分析。然后在仿真研究中通过改变溶液液面上初始平衡压力、气液体积比和气体溶解度,得到气体溶解和析出过程中压力及液体中溶解气体体积的仿真曲线。(3).设计并搭建试验平台,并通过电动振动系统加速试验过程,然后根据试验数据的误差分析提出试验平台优化与改进的方法,最后通过改进后的试验平台优化了试验方案与试验步骤。(4).对气体溶解和析出过程进行试验研究,得到不同试验条件下对抗磨液压油、工业齿轮油和纯水进行试验的压力变化曲线,同时确定了每种溶液在不同气液体积比条件下的气体溶解和析出时间常数。最后根据测量空气在液体中的溶解度,对气体溶解和析出过程中压力的试验曲线与仿真曲线进行对比。本文提出了气体溶解和析出过程中压力及溶解气体体积的数学模型,并对模型的影响因素进行仿真研究;试验平台通过电动振动系统,加速气体溶解和析出试验过程;通过气体溶解和析出过程中压力的仿真结果和试验结果对比,验证了数学模型的正确性,同时通过试验数据确定了不同液体在改变气液体积比条件下的气体溶解和析出时间常数,为液压脉动管路气泡模型研究奠定基础。
[Abstract]:In the hydraulic system, the process of gas dissolution and precipitation in the liquid is caused by the change of pressure, resulting in the emergence and disintegration of bubbles and cavitation, and the emergence and disintegration of bubbles and cavitation can not only cause the change of the pressure of the system, but also break and failure to the components of the system and eventually lead to the decline of the performance of the system. In addition, in the design and production of petrochemical industry, the separation effect of gas and liquid separation technology is mainly determined by the related parameters in the process of gas dissolution and precipitation. Therefore, it is very necessary to study the process of gas dissolution and precipitation. This topic is the simulation and experimental study of the gas dissolution and analysis in the liquid. The contents are as follows: (1) according to Henry's law and ideal gas state equation in fluid mechanics, the mathematical model of gas dissolving and precipitation process and the basic equation for deriving the solubility of gas in liquid are established. (2) based on MATLAB simulation software, the mathematical model is simulated and analyzed. Then the solution is changed in the simulation study. The initial balance pressure, the volume ratio of gas-liquid and gas solubility on the liquid surface, the simulation curves of pressure and dissolved gas volume in the process of gas dissolution and precipitation are obtained. (3) the test platform is designed and built, and the test process is accelerated through the electric vibration system. Then, the test platform is optimized and modified according to the error analysis of the test data. In the end, the test scheme and the test steps were optimized by the improved test platform. (4) the process of gas dissolution and precipitation was tested, and the pressure change curves were obtained under different test conditions against grinding hydraulic oil, industrial gear oil and pure water, and each solution in different gas and liquid volume ratio strips was determined. Finally, according to the solubility of the air in the liquid, the test curve of the pressure in the process of dissolved and precipitated gas is compared with the simulation curve. The mathematical model of the pressure and the volume of dissolved gas in the process of gas dissolution and precipitation is put forward, and the influence factors of the model are imitated. True research; the test platform accelerates the process of gas dissolution and precipitation through the electric vibration system. Through the comparison of the simulation results of the pressure in the process of gas dissolution and precipitation, the correctness of the mathematical model is verified. At the same time, the gas dissolution and analysis of different liquids under the condition of changing the volume ratio of gas to liquid are determined by the test data. The time constant is the basis for studying the bubble model of hydraulic pulsating pipeline.

【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH137

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