發(fā)布時(shí)間：2018-01-13 16:26

  本文關(guān)鍵詞：螺旋葉片式水力旋流器數(shù)值模擬及結(jié)構(gòu)優(yōu)化　出處：《沈陽(yáng)航空航天大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 割縫式旋流器 兩相分離 正交優(yōu)化 分離性能 數(shù)值模擬

【摘要】：近年來(lái)隨著我國(guó)經(jīng)濟(jì)的飛速發(fā)展與社會(huì)的不斷進(jìn)步,石油已經(jīng)成為人們的日常生產(chǎn)生活之中無(wú)可替代的必需品。當(dāng)今我國(guó)的石油開(kāi)采工作還在不斷進(jìn)展當(dāng)中,大多數(shù)主力油田采出石油的含水率也在急劇增加。含油污水是一種對(duì)環(huán)境極具破壞性的污染源,因此,含油污水的處理不僅對(duì)保護(hù)水資源乃至維持地球的生態(tài)平衡都有著非同尋常的意義。采用旋流器來(lái)進(jìn)行含油污水處理的方法始于二十世紀(jì)八十年代末,并于二十世紀(jì)九十年代初期開(kāi)始在國(guó)內(nèi)外獲得了廣泛的應(yīng)用。本文對(duì)近年來(lái)的螺旋葉片式水力旋流器的研究進(jìn)展做出了整體的概括,并在傳統(tǒng)的螺旋葉片式旋流器的基礎(chǔ)上,以提高旋流器分離效率為目的,通過(guò)對(duì)其溢流管尾部進(jìn)行割縫處理的方式,設(shè)計(jì)出一種新型的割縫螺旋葉片式水力旋流器。利用Creo3.0建模軟件對(duì)已設(shè)計(jì)出的旋流器進(jìn)行實(shí)體建模,之后使用ANSYS前處理軟件Meshing對(duì)模型進(jìn)行網(wǎng)格劃分,最后導(dǎo)入到計(jì)算流體力學(xué)(Fluent)軟件中來(lái)進(jìn)行數(shù)值模擬計(jì)算分析。經(jīng)Fluent模擬結(jié)果表明,在同等條件下溢流管直徑取20mm、割縫長(zhǎng)為25mm、割縫寬度取2mm和割縫數(shù)量為8時(shí),內(nèi)部流場(chǎng)速度分布對(duì)稱性較好,溢流管油相體積分?jǐn)?shù)較高,不易發(fā)生紊流現(xiàn)象,且綜合分離性能最好,分離效率可達(dá)94.5%。為使旋流器的性能再次得到提升,再次對(duì)溢流管割縫進(jìn)行排列優(yōu)化。經(jīng)數(shù)值模擬結(jié)果表明改進(jìn)后的模型較比之前的模型分離效率有所提高,其分離效率最高可達(dá)96.7%。最后通過(guò)實(shí)驗(yàn)驗(yàn)證,得到旋流器實(shí)際的分離效率為96.2%,雖然數(shù)值模擬和實(shí)驗(yàn)結(jié)果有一些差異,這是因?yàn)槔硐氲哪M邊界條件設(shè)定與實(shí)驗(yàn)條件存在一定差異所致,且誤差值微乎其微直接可以忽略不計(jì)。觀察實(shí)驗(yàn)得出的百分比變化趨勢(shì)折線圖發(fā)現(xiàn),實(shí)際實(shí)驗(yàn)的曲線與數(shù)值模擬曲線較為吻合,同時(shí)正交試驗(yàn)優(yōu)選后的縫螺旋葉片式旋流器結(jié)構(gòu)分離性能穩(wěn)定較好,證明了通過(guò)正交優(yōu)化試驗(yàn)法對(duì)旋流器溢流管進(jìn)行割縫的設(shè)計(jì)方案是可以實(shí)現(xiàn)的。
[Abstract]:In recent years, with the rapid development of our economy and social progress, oil has become an irreplaceable necessity in people's daily production and life. The water cut of oil produced in most major oil fields is also increasing sharply. Oily sewage is a very destructive pollution source to the environment, therefore. The treatment of oily sewage is of great significance not only to protect water resources but also to maintain the ecological balance of the earth. The method of using hydrocyclone to treat oily sewage began at the end of 1980s. Since the beginning of 1990s, it has been widely used at home and abroad. In this paper, the research progress of spiral vane hydrocyclone in recent years is summarized. On the basis of the traditional spiral vane cyclone, in order to improve the separation efficiency of the cyclone, the slit treatment of the tail of the overflow tube is carried out. A new type of slit spiral vane hydrocyclone is designed and the solid model of the designed hydrocyclone is built by using Creo3.0 modeling software. Then we use ANSYS pre-processing software Meshing to mesh the model. Finally, the numerical simulation and analysis are carried out by the software of computational fluid dynamics. The Fluent simulation results show that the diameter of the overflow pipe is 20mm under the same conditions. The length of slit is 25mm, the width of slit is 2mm and the quantity of slit is 8:00. The velocity distribution of internal flow field is symmetrical, and the volume fraction of oil phase of overflow pipe is higher, so it is not easy to occur turbulence phenomenon. And the comprehensive separation performance is the best, separation efficiency can reach 94.5. in order to make the performance of the cyclone to be improved again. The numerical simulation results show that the improved model has higher separation efficiency than the previous model, and the maximum separation efficiency can reach 96.7. finally, the experimental results show that the improved model can improve the separation efficiency of the overflow pipe slit. Finally, the experimental results show that the improved model has higher separation efficiency than the previous model. The actual separation efficiency of hydrocyclone is 96.2, although there are some differences between the numerical simulation and the experimental results, this is due to the difference between the ideal simulation boundary conditions and the experimental conditions. And the error value can be ignored directly. The curve of the actual experiment is in good agreement with the numerical simulation curve. At the same time, the structure separation performance of slit spiral vane hydrocyclone is stable after orthogonal test, which proves that the design scheme of slit cutting for overflow tube of cyclone can be realized by orthogonal optimization test.
【學(xué)位授予單位】：沈陽(yáng)航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X741;TE937

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