本文選題：油氣潤滑 + 環(huán)狀流　； 參考：《燕山大學(xué)》2011年碩士論文

【摘要】：隨著現(xiàn)代化工業(yè)生產(chǎn)水平的不斷提高,對機械工業(yè)的要求也越來越高,當前機械產(chǎn)品正朝著高速、重載、高效、節(jié)能、自動化程度高和使用壽命長的方向發(fā)展,對潤滑效果的要求也越來越高。油氣潤滑就是適應(yīng)新時期發(fā)展需求而開發(fā)的新型潤滑方式,它綜合了氣液兩種流體潤滑的特點,起到了冷卻與潤滑的雙重作用,能夠?qū)崿F(xiàn)連續(xù)、定量、緩慢、均勻地向潤滑點供油,可以最大限度地提高被潤滑元件的使用壽命。同時,油氣潤滑還具有潤滑介質(zhì)消耗量極低、對環(huán)境污染小和自動化程度高等優(yōu)點,已應(yīng)用于多個工業(yè)領(lǐng)域,并取得了良好的經(jīng)濟效益。 環(huán)狀流是符合油氣潤滑工況下,油氣輸送管道內(nèi)兩相流的流型。國內(nèi)目前油氣潤滑技術(shù)水平較低的主要原因就是對環(huán)狀流形成機理的認識還不夠深刻。因此,本課題以開發(fā)具有自主知識產(chǎn)權(quán)的油氣潤滑系統(tǒng)及關(guān)鍵零部件為目的,進行了以下幾個方面的研究: (1)基于流體力學(xué)的基本方程,結(jié)合環(huán)狀流的流動特點,建立其數(shù)學(xué)模型;并給出了環(huán)狀流動時的壓降、液膜厚度和截面含氣率的計算方法。 (2)通過高速攝影法獲取油氣混合器和流型觀察段內(nèi)氣液兩相瞬時分布圖片,據(jù)此判斷不同氣液流量時管內(nèi)流型,得出了流型的轉(zhuǎn)換規(guī)律;重點分析環(huán)狀流時氣液兩相的相互作用,提出了新的環(huán)狀流形成機理。 (3)利用流體仿真軟件FLUENT對油氣混合器內(nèi)流場進行數(shù)值模擬,研究氣液兩相的流動特性和判斷流型,并與Mandhane流型圖作對比;分析不同氣液流量時的兩相體積分數(shù)分布圖及壓力、速度分布情況,豐富、完善由實驗結(jié)果得出的環(huán)狀流形成機理。
[Abstract]:With the continuous improvement of the level of modern industrial production, the requirements for the machinery industry are becoming higher and higher. The current mechanical products are developing towards high speed, heavy load, high efficiency, energy saving, high automation and long service life, and the requirements for the lubrication effect are becoming higher and higher. Oil and gas lubrication is a new type of development to adapt to the development of the new period. The lubrication method, which combines the characteristics of two kinds of fluid lubrication, plays the dual role of cooling and lubrication, can achieve continuous, quantitative, slow, uniform supply of oil to the lubricating point, and can maximize the service life of the lubricating element. At the same time, the oil and gas lubrication also has low lubricating medium consumption and low pollution and self pollution to the environment. The advantages of high degree of automation have been applied to many industrial fields and good economic benefits have been achieved.
The annular flow is the flow pattern of the two-phase flow in the oil and gas pipeline under the condition of oil and gas lubrication. The main reason for the low oil and gas lubrication technology at home is that the understanding of the forming mechanism of the annular flow is not deep enough. Therefore, the purpose of this project is to develop the oil and gas lubrication system and key components with independent intellectual property. The following aspects of the study:
(1) based on the basic equations of fluid mechanics and combining the flow characteristics of the annular flow, the mathematical model is established, and the calculation method of pressure drop, the thickness of the liquid film and the gas content of the cross section in the annular flow is given.
(2) the instantaneous distribution picture of gas and liquid two phase in the oil gas mixer and the flow pattern observation section is obtained by high speed photography. According to this, the flow pattern in the tube is judged by the different gas and liquid flow, and the transformation law of the flow pattern is obtained. The interaction of the gas-liquid two phases in the annular flow is emphatically analyzed, and the new forming mechanism of the annular flow is put forward.
(3) use the fluid simulation software FLUENT to simulate the flow field in the oil and gas mixer, study the flow characteristics of the gas-liquid two phase and determine the flow pattern, and compare with the Mandhane flow pattern, analyze the two phase volume fraction distribution diagram and pressure, the velocity distribution situation in different gas and liquid flow, and enrich the annular flow formation from the experimental results. Mechanism.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH117.2

【引證文獻】

相關(guān)期刊論文 前1條

1 李志宏;孫啟國;呂洪波;;油氣潤滑系統(tǒng)水平管路中環(huán)狀流的形成過程及特性研究[J];潤滑與密封;2012年07期

相關(guān)碩士學(xué)位論文 前3條

1 李志宏;油氣潤滑水平管內(nèi)環(huán)狀流流動特性研究[D];北方工業(yè)大學(xué);2012年

2 曾憲文;油氣混合器結(jié)構(gòu)設(shè)計及性能分析[D];北方工業(yè)大學(xué);2013年

3 李嬋;油氣分配器的結(jié)構(gòu)設(shè)計與性能仿真[D];北方工業(yè)大學(xué);2013年

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本文編號：2013525