本文關(guān)鍵詞： 分布規(guī)律 固液二相流 多孔介質(zhì) 顆粒直徑 遷移—沉積　出處：《北方工業(yè)大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：固液二相流入滲多孔介質(zhì)的實(shí)例廣泛存在于工業(yè)、農(nóng)業(yè)、礦業(yè)和石油業(yè)等領(lǐng)域。隨著近年來(lái)對(duì)環(huán)境問(wèn)題的的關(guān)注,對(duì)該領(lǐng)域的研究越來(lái)越頻繁,比如尾礦的滲漏,垃圾滲瀝液的遷移污染,地下水回灌等領(lǐng)域均具有重要的應(yīng)用價(jià)值及意義。本文以尾礦庫(kù)礦漿排放過(guò)程中礦漿顆粒在庫(kù)內(nèi)沉積問(wèn)題為背景,開(kāi)展不同條件下固液二相流在多孔介質(zhì)的分布規(guī)律試驗(yàn)研究,旨在獲取多孔介質(zhì)內(nèi)入滲顆粒的沉積和分布規(guī)律,本文主要研究?jī)?nèi)容如下:(1)研究顆粒運(yùn)動(dòng)基本理論,多孔介質(zhì)孔隙模型,多孔介質(zhì)中顆粒的主要遷移-沉積模型以及當(dāng)前對(duì)遷移-沉積模型所進(jìn)行過(guò)的試驗(yàn)研究方式。(2)設(shè)計(jì)不同條件下固液二相流在多孔介質(zhì)分布的實(shí)驗(yàn)裝置及實(shí)驗(yàn)方案。研究多孔介質(zhì)的壁面效應(yīng)與介質(zhì)孔隙通道平均直徑的對(duì)應(yīng)關(guān)系,并且進(jìn)一步研究介質(zhì)的直徑與介質(zhì)顆粒中值粒徑比值Dt/DP對(duì)孔隙通道平均直徑的影響,得到本實(shí)驗(yàn)壁面效應(yīng)的大小。(3)開(kāi)展試驗(yàn)探究不同因素下入滲顆粒在多孔介質(zhì)的分布規(guī)律。通過(guò)設(shè)定差異的多孔介質(zhì)顆粒粒徑、入滲顆粒粒徑以及顆粒濃度來(lái)研究:顆粒在多孔介質(zhì)的瞬時(shí)沉積質(zhì)量和總累計(jì)沉積質(zhì)量在不同時(shí)間的對(duì)應(yīng)關(guān)系;多孔介質(zhì)段內(nèi)部及上界面處顆粒沉積的最終質(zhì)量分析;多孔介質(zhì)各段中顆粒沉積強(qiáng)度和最終沉積質(zhì)量分析;最終由多孔介質(zhì)中顆粒沉積的不同現(xiàn)象進(jìn)行分類(lèi)總結(jié),得出沉積分布規(guī)律。(4)設(shè)計(jì)正交試驗(yàn)研究多孔介質(zhì)顆粒粒徑、入滲顆粒粒徑、水頭高度、二相流濃度對(duì)多孔介質(zhì)滲透性能改變程度影響�；趯�(duì)流—彌散方程,采用飽和、均質(zhì)的多孔介質(zhì)中,顆粒在一維穩(wěn)定滲流下的運(yùn)輸方程來(lái)推導(dǎo)多孔介質(zhì)孔隙率隨入滲時(shí)間的演化規(guī)律。
[Abstract]:Examples of solid-liquid two-phase flow infiltration porous media widely exist in industry, agriculture, mining and oil industry. With the attention to environmental problems in recent years, the research in this field is becoming more and more frequent. For example, the leakage of tailings, pollution of leachate migration, groundwater recharge and other fields have important application value and significance. The distribution of solid-liquid two-phase flow in porous media was studied under different conditions in order to obtain the deposition and distribution of infiltrated particles in porous media. The main contents of this paper are as follows: (1) the basic theory of particle movement and pore model of porous media are studied. The main migration-deposition models of particles in porous media and the current experimental study of migration-deposition models. The experimental device and scheme of solid-liquid two-phase flow distribution in porous media were designed under different conditions. The relationship between the wall effect of porous media and the average diameter of porous channel was studied. Furthermore, the influence of the ratio of medium diameter to medium particle median particle diameter (Dt/DP) on the mean diameter of pore channel is further studied. The size of the wall effect in this experiment. 3) to investigate the distribution of infiltration particles in porous media under different factors. By setting different particle size of porous media. To study the particle size and particle concentration: the relationship between the instantaneous deposition quality of particles in porous media and the total cumulative deposition quality at different times; Final quality analysis of particle deposition in the internal and upper interface of porous media segment; Analysis of particle deposition strength and final deposition quality in porous media; Finally, the different phenomena of particle deposition in porous media were classified and summarized, and the sediment distribution law was obtained. (4) orthogonal experiments were designed to study the particle size, infiltration particle size and water head height of porous media. The effect of two-phase flow concentration on the permeability of porous media was studied. Based on convection-dispersion equation, saturated and homogeneous porous media was used. The evolution of porous media porosity with infiltration time is derived by the transport equation of particles under one-dimensional steady seepage.
【學(xué)位授予單位】：北方工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：O359;O357.3

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