本文關(guān)鍵詞： 管道輸送 固液兩相流 阻力損失 計算流體力學(xué)原理 數(shù)值模擬　出處：《昆明理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：我國礦產(chǎn)資源豐富,但大多位于偏僻的山區(qū),新建鐵路、公路等運(yùn)輸干線投資較大、建設(shè)時間長且對環(huán)境造成嚴(yán)重破壞。管道輸送因成本低、效率高、占地少且污染小,越來越受到人們的重視。在運(yùn)用管道對礦漿進(jìn)行輸送時,管道的阻力特性是管道輸送技術(shù)中的關(guān)鍵問題之一,直接影響著整個管道系統(tǒng)輸送壓力大小、泵型、泵站數(shù)量以及管道材質(zhì)及管壁厚度的選擇,在整個管道輸送系統(tǒng)中起著舉足輕重的作用。因此,對阻力損失的研究具有十分重要的意義。此外,由于輸送管線在鋪設(shè)過程中受到地理位置的限制,高低起伏落差大,不再是水平鋪設(shè)而是呈現(xiàn)坡度不等的傾斜鋪設(shè),因此,對復(fù)雜形態(tài)管道輸送特性的研究尤為重要。由于固液兩相流復(fù)雜的流動規(guī)律,進(jìn)行純粹的理論研究相當(dāng)困難的,歷來的研究往往主要基于試驗(yàn),不僅耗費(fèi)大量的人力、物力和時間且得到的均是經(jīng)驗(yàn)公式,受實(shí)驗(yàn)條件的限制�；诖吮疚膹墓桃簝上嗔骼碚摮霭l(fā),結(jié)合計算流體力學(xué)原理,利用計算機(jī)對管道輸送進(jìn)行數(shù)值模擬與分析,論文的主要研究工作如下:(1)針對固體物料進(jìn)行了相關(guān)的物理特性和漿體特性基礎(chǔ)實(shí)驗(yàn)的研究,對固體物料及漿體內(nèi)部運(yùn)動機(jī)理進(jìn)行了初探,為后續(xù)數(shù)值模擬實(shí)驗(yàn)參數(shù)的設(shè)置奠定基礎(chǔ)。(2)基于計算流體力學(xué)(Computation Fluid Dynamics)采用多相流模型-歐拉模型并通過Fluent軟件進(jìn)行數(shù)值模擬,探討了不同流速、顆粒濃度、顆粒粒徑、顆粒密度、管道管徑及傾角下管道出口處的漿體流速分布及固體顆粒濃度分布的變化規(guī)律,并分析了不同工況下阻力損失的變化規(guī)律,為實(shí)際工程提供良好的工程實(shí)踐參考價值。(3)通過分析不同工況下的固體顆粒流動規(guī)律,得到管道輸送阻力損失的主要來源,并通過分析仿真結(jié)果,擬合各輸送因素與阻力損失的關(guān)系表達(dá)式,基于能量理論,依據(jù)量綱分析分別建立了水平和傾斜管道的阻力損失計算模型,并通過實(shí)測數(shù)據(jù)對模型進(jìn)行驗(yàn)證,均達(dá)到很好的效果,為固液兩相流管道輸送阻力損失預(yù)測方面提供一定的借鑒價值。本文采用理論與實(shí)驗(yàn)相結(jié)合的方式,基于能量理論,結(jié)合計算流體力學(xué)原理對管道輸送進(jìn)行數(shù)值模擬與分析,不僅方便快捷,且能很好的觀測管道內(nèi)部的流型變化規(guī)律,對實(shí)際工程具有一定的實(shí)踐指導(dǎo)意義。
[Abstract]:Our country is rich in mineral resources, but most of them are located in remote mountainous areas. The main transportation lines such as new railways and highways have a large investment, long construction time and serious damage to the environment. Due to low cost, high efficiency, less land occupation and less pollution, pipeline transportation has the advantages of low cost, high efficiency, small area and little pollution. The resistance characteristic of pipeline is one of the key problems in pipeline transportation technology, which directly affects the pressure and pump type of the whole pipeline system. The number of pumping stations, the selection of pipe material and the thickness of pipe wall play an important role in the whole pipeline transportation system. Therefore, the study of resistance loss is of great significance. Because the transportation pipeline is restricted by the geographical position in the course of laying, the height and height fluctuate greatly, it is not horizontal laying but inclined laying with different slope, so, It is very important to study the transportation characteristics of pipeline with complex shape. Because of the complex flow law of solid-liquid two-phase flow, it is very difficult to carry out pure theoretical research. The material resources and time are all empirical formulas, which are limited by experimental conditions. Based on this, based on the theory of solid-liquid two-phase flow and the principle of computational fluid dynamics, the numerical simulation and analysis of pipeline transportation are carried out by computer. The main research work of this paper is as follows: (1) the basic experiments on physical properties and slurry properties of solid materials have been carried out, and the motion mechanism of solid materials and slurry has been studied. In order to lay a foundation for the setting of experimental parameters for subsequent numerical simulation, the multiphase flow model-Euler model is adopted based on computational fluid dynamics (CFD) and the numerical simulation is carried out by Fluent software. The different velocity of flow, particle concentration and particle size are discussed. The variation law of particle density, slurry velocity distribution and solid particle concentration distribution at the outlet of pipeline under pipe diameter and dip angle are analyzed, and the variation law of resistance loss under different working conditions is analyzed. By analyzing the flow law of solid particles under different working conditions, the main source of pipeline transportation resistance loss is obtained, and the simulation results are analyzed. According to the energy theory and dimensional analysis, the calculation models of the resistance loss of horizontal and inclined pipelines are established, and the model is verified by the measured data. It can provide some reference value for predicting the resistance loss of solid-liquid two-phase pipeline transportation. In this paper, the method of combining theory with experiment, based on energy theory, is adopted. The numerical simulation and analysis of pipeline transportation based on the principle of computational fluid dynamics are not only convenient and quick, but also can well observe the variation of flow pattern in pipeline, and have a certain practical significance for practical engineering.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD50

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 楊佳奇;彭泉霖;唐穎;;水平圓管內(nèi)固液兩相流的壓降及流型分析[J];水力采煤與管道運(yùn)輸;2014年03期

2 張欽禮;姜志良;王石;陳秋松;朱陽亞;萬孝衡;;高濃度超細(xì)全尾砂充填料漿管道輸送阻力模型[J];科技導(dǎo)報;2014年24期

3 吳迪;蔡嗣經(jīng);楊威;王文瀟;王章;;基于CFD的充填管道固液兩相流輸送模擬及試驗(yàn)[J];中國有色金屬學(xué)報;2012年07期

4 王繼紅;張騰飛;王樹剛;梁運(yùn)濤;;水平管道內(nèi)固液兩相流流動特性的CFD模擬[J];化工學(xué)報;2011年12期

5 付林;高炳軍;;油煤漿輸送管道彎管部位流場的數(shù)值模擬與磨損預(yù)測[J];化工機(jī)械;2009年05期

6 張宏兵;陳露露;謝榮華;劉興斌;鄭�？�;尚作萍;;水平圓管固液兩相穩(wěn)態(tài)流動特性數(shù)值模擬[J];化工學(xué)報;2009年05期

7 趙利安;孟慶華;;伴有滑動床的漿體傾斜管道摩阻損失研究[J];礦業(yè)研究與開發(fā);2008年02期

8 趙曉鳳;;漿體管道輸送技術(shù)及應(yīng)用[J];甘肅冶金;2007年04期

9 劉誠;沈永明;唐軍;;水平方管內(nèi)固液兩相流運(yùn)動特性數(shù)值模擬[J];水利學(xué)報;2007年07期

10 劉永兵;陳紀(jì)忠;陽永榮;;管道內(nèi)液固漿液輸送的數(shù)值模擬[J];浙江大學(xué)學(xué)報(工學(xué)版);2006年05期

相關(guān)博士學(xué)位論文 前3條

1 趙利安;大顆粒漿體管內(nèi)流動規(guī)律研究[D];遼寧工程技術(shù)大學(xué);2011年

2 張士林;沉降性漿體速度與濃度分布耦合模型及遷移速度研究[D];大連理工大學(xué);2005年

3 馬銀亮;高濃度氣固兩相流的數(shù)值模擬研究[D];浙江大學(xué);2001年

相關(guān)碩士學(xué)位論文 前3條

1 李婷;礦漿管道水力輸送動力特性研究[D];武漢理工大學(xué);2013年

2 唐曉明;高濃度粘稠物料的泵送及流變特性試驗(yàn)研究[D];浙江大學(xué);2007年

3 解海衛(wèi);粉煤灰濃漿管道流動特性與阻力特性的研究[D];華北電力大學(xué)（河北）;2005年

，

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