本文選題：壓力曲線 + 氣體溶解和析出時(shí)間常數(shù)　； 參考：《電子科技大學(xué)》2017年碩士論文

【摘要】：在液壓系統(tǒng)中,由于壓力的變化導(dǎo)致液體中發(fā)生氣體溶解和析出過程,從而出現(xiàn)氣泡和氣穴的產(chǎn)生及破滅現(xiàn)象,而氣泡和氣穴的產(chǎn)生及破滅不但會(huì)引起系統(tǒng)的壓力變化,對(duì)組成系統(tǒng)的元件產(chǎn)生破壞及失效,最終致使系統(tǒng)的工作性能下降。此外,在石油化工設(shè)計(jì)和生產(chǎn)中,氣液分離技術(shù)的分離效果主要由氣體溶解和析出過程中相關(guān)參數(shù)決定。因此本課題對(duì)氣體溶解和析出過程進(jìn)行研究是十分必要的。本課題是對(duì)液體中氣體溶解和析出現(xiàn)象進(jìn)行仿真與試驗(yàn)研究,其主要內(nèi)容為:(1).根據(jù)流體力學(xué)中的亨利定律和理想氣體狀態(tài)方程構(gòu)建氣體溶解和析出過程的數(shù)學(xué)模型以及推導(dǎo)氣體在液體中溶解度的基本方程。(2).基于MATLAB仿真軟件,對(duì)所構(gòu)建的數(shù)學(xué)模型進(jìn)行仿真分析。然后在仿真研究中通過改變?nèi)芤阂好嫔铣跏计胶鈮毫�、氣液體積比和氣體溶解度,得到氣體溶解和析出過程中壓力及液體中溶解氣體體積的仿真曲線。(3).設(shè)計(jì)并搭建試驗(yàn)平臺(tái),并通過電動(dòng)振動(dòng)系統(tǒng)加速試驗(yàn)過程,然后根據(jù)試驗(yàn)數(shù)據(jù)的誤差分析提出試驗(yàn)平臺(tái)優(yōu)化與改進(jìn)的方法,最后通過改進(jìn)后的試驗(yàn)平臺(tái)優(yōu)化了試驗(yàn)方案與試驗(yàn)步驟。(4).對(duì)氣體溶解和析出過程進(jìn)行試驗(yàn)研究,得到不同試驗(yàn)條件下對(duì)抗磨液壓油、工業(yè)齒輪油和純水進(jìn)行試驗(yàn)的壓力變化曲線,同時(shí)確定了每種溶液在不同氣液體積比條件下的氣體溶解和析出時(shí)間常數(shù)。最后根據(jù)測(cè)量空氣在液體中的溶解度,對(duì)氣體溶解和析出過程中壓力的試驗(yàn)曲線與仿真曲線進(jìn)行對(duì)比。本文提出了氣體溶解和析出過程中壓力及溶解氣體體積的數(shù)學(xué)模型,并對(duì)模型的影響因素進(jìn)行仿真研究;試驗(yàn)平臺(tái)通過電動(dòng)振動(dòng)系統(tǒng),加速氣體溶解和析出試驗(yàn)過程;通過氣體溶解和析出過程中壓力的仿真結(jié)果和試驗(yàn)結(jié)果對(duì)比,驗(yàn)證了數(shù)學(xué)模型的正確性,同時(shí)通過試驗(yàn)數(shù)據(jù)確定了不同液體在改變氣液體積比條件下的氣體溶解和析出時(shí)間常數(shù),為液壓脈動(dòng)管路氣泡模型研究奠定基礎(chǔ)。
[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.

【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH137

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