【摘要】：閥門作為管路流量控制過程中重要設(shè)備，其精確特性日益受到重視。閥門傳統(tǒng)的試驗(yàn)研究方法只能獲得閥門的宏觀外部特性，并且周期長，成本高，不能獲得閥門內(nèi)部的微觀流場(chǎng)結(jié)構(gòu)和精確特性。隨著CFD理論及CFD模擬軟件的發(fā)展，CFD可視化模擬越來越受到學(xué)術(shù)和工業(yè)界的青睞。本文對(duì)基于FLUENT的文丘利氣流控制閥的三維可視化模擬仿真進(jìn)行了研究。 本文對(duì)文丘利氣流控制閥的工業(yè)用途和有關(guān)調(diào)節(jié)閥門的CFD研究現(xiàn)狀及相關(guān)理論研究進(jìn)展進(jìn)行了闡述；對(duì)文丘利氣流控制閥門的流阻及流量特性進(jìn)行了分析；討論了與文丘利閥流動(dòng)相關(guān)的CFD理論及控制方程；最后針對(duì)文丘利氣流控制閥的典型工況進(jìn)行了CFD可視化模擬仿真。本文具體工作如下： 1）為了保證本文CFD計(jì)算的科學(xué)性，在對(duì)文丘利氣流控制閥進(jìn)行流場(chǎng)計(jì)算模擬之前，首先對(duì)現(xiàn)有的中心對(duì)稱蝶閥進(jìn)行了模擬研究；將蝶閥的流場(chǎng)分布及動(dòng)力矩特性的研究結(jié)果，與相關(guān)理論及文獻(xiàn)上的結(jié)果進(jìn)行對(duì)比，，結(jié)果是相當(dāng)吻合的，從而驗(yàn)證了非結(jié)構(gòu)混合網(wǎng)格技術(shù)，標(biāo)準(zhǔn)κε湍流模式和非結(jié)構(gòu)網(wǎng)格SIMPLE算法對(duì)這一類氣流控制閥門流場(chǎng)計(jì)算的合理性。 2）以壓力入口和壓力出口為邊界條件，通過對(duì)三種不同的入口壓力情況，以及閥板處于10°～80°的不同開度狀態(tài)，分別進(jìn)行了建模和網(wǎng)格劃分；通過大量的仿真計(jì)算得出了不同入口壓力條件及閥板分別處于不同開度時(shí)的速度及壓力云圖，速度矢量圖和流線圖；很好地反映出了閥板鈍體繞流作用下，閥板前后流場(chǎng)變化情況及隨著閥門開啟過程中漩渦的產(chǎn)生及消失過程。 3）對(duì)三種壓力入口條件及處于不同開度時(shí)閥板所受到的氣動(dòng)力矩進(jìn)行了計(jì)算，得出了閥板所受的氣動(dòng)合力矩隨閥板開度變化的曲線圖；反映出了該閥門的氣動(dòng)力矩呈現(xiàn)出交變彈性負(fù)載規(guī)律。 最后對(duì)本文研究內(nèi)容進(jìn)行了總結(jié)，并對(duì)本課題的進(jìn)一步研究進(jìn)行了展望。
[Abstract]:Valve as an important equipment in pipe flow control process, its accurate characteristics are paid more and more attention. The traditional method of valve test and research can only obtain the macroscopic external characteristics of the valve, and the cycle is long, the cost is high, and the microscopic flow field structure and accurate characteristics of the valve can not be obtained. With the development of CFD theory and CFD simulation software, CFD visualization simulation is more and more popular in academic and industry. In this paper, the three-dimensional visual simulation of Venturi airflow control valve based on FLUENT is studied. In this paper, the industrial use of Venturi airflow control valve, the CFD research status of regulating valve and related theoretical research progress are described, and the flow resistance and flow characteristics of Venturi airflow control valve are analyzed. The CFD theory and control equation related to Venturi valve flow are discussed. Finally, the visual simulation of Venturi airflow control valve by CFD is carried out. The specific work of this paper is as follows: 1) in order to ensure the scientific nature of the CFD calculation in this paper, the existing centrosymmetric butterfly valve is simulated before the flow field simulation of the Venturi airflow control valve; The results of flow field distribution and dynamic moment characteristics of butterfly valve are compared with those of related theory and literature, and the results are in good agreement, thus verifying the unstructured hybrid grid technology. The rationality of standard 魏 蔚 turbulence model and unstructured grid SIMPLE algorithm for calculating the flow field of this kind of airflow control valve. 2) taking the pressure inlet and the pressure outlet as the boundary conditions, three different inlet pressure conditions and the different opening states of the valve plate in the range of 10 擄~ 80 擄were established and meshed, respectively; The velocity and pressure cloud diagram, velocity vector diagram and streamline diagram of different inlet pressure condition and valve plate in different opening degree are obtained by a large number of simulation calculations. The change of flow field before and after the valve plate and the process of vortex generation and disappearance in the process of valve opening under the action of the blunt body of valve plate are well reflected. 3) the three pressure inlet conditions and the aerodynamic moment of the valve plate at different opening degrees are calculated, and the curves of the aerodynamic force moment of the valve plate with the opening degree of the valve plate are obtained. The aerodynamic moment of the valve shows the law of alternating elastic load. Finally, the research content is summarized, and the further research of this topic is prospected.
【學(xué)位授予單位】：武漢科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH138.52

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉健;李福堂;;基于Fluent的蝶閥三維流動(dòng)的數(shù)值模擬及分析[J];遼寧科技大學(xué)學(xué)報(bào);2008年Z1期

2 石娟;姚征;馬明軒;;調(diào)節(jié)閥內(nèi)三維流動(dòng)與啟閉過程的數(shù)值模擬及分析[J];上海理工大學(xué)學(xué)報(bào);2005年06期

3 吳文權(quán);流體繞多個(gè)鈍體不穩(wěn)定分離流動(dòng)數(shù)值仿真[J];華東工業(yè)大學(xué)學(xué)報(bào);1997年03期

4 徐宏海;楊麗;詹寧;;基于Fluent的調(diào)節(jié)閥內(nèi)部流場(chǎng)數(shù)值模擬[J];機(jī)械設(shè)計(jì)與制造;2009年08期

5 李志輝;張涵信;;跨流域三維復(fù)雜繞流問題的氣體運(yùn)動(dòng)論并行計(jì)算[J];空氣動(dòng)力學(xué)學(xué)報(bào);2010年01期

6 汪大洋;周云;譚平;;三維鈍體結(jié)構(gòu)風(fēng)壓分布與繞流特性的大渦模擬研究[J];空氣動(dòng)力學(xué)學(xué)報(bào);2011年03期

7 諸葛偉林,劉光臨,蔣勁,符向前;蝶閥三維分離流動(dòng)的數(shù)值模擬研究[J];流體機(jī)械;2003年06期

8 李玲,李玉梁;應(yīng)用基于RNG方法的湍流模型數(shù)值模擬鈍體繞流的湍流流動(dòng)[J];水科學(xué)進(jìn)展;2000年04期

9 程永光;基于插值的Lattice Boltzmann方法非均勻網(wǎng)格算法[J];武漢水利電力大學(xué)學(xué)報(bào);2000年05期

10 金曉宏;大型閥門開度電液控制系統(tǒng)研究[J];武漢冶金科技大學(xué)學(xué)報(bào);1997年02期

相關(guān)碩士學(xué)位論文 前1條

1 李斌;基于CFD的調(diào)節(jié)閥內(nèi)部流場(chǎng)的研究[D];蘭州理工大學(xué);2009年

本文編號(hào)：2369466