貓?zhí)哟┰焦艿劳话l(fā)性溢油事故數(shù)值模擬
發(fā)布時間：2018-09-03 19:00
【摘要】：論文針對河流穿越原油管道發(fā)生泄漏擴(kuò)散時涉及的河底土壤中、水體中、水面擴(kuò)散過程,將理論研究與FLUENT軟件數(shù)值模擬相結(jié)合,建立了河流穿越原油管道各個階段溢油擴(kuò)散通用模型。分析了現(xiàn)場風(fēng)速、水流速度、油品泄漏初始速度、泄漏孔徑大小等主要因素對擴(kuò)散過程發(fā)展結(jié)果的影響規(guī)律。根據(jù)貓?zhí)哟┰焦こ虒嶋H情況,建立了不同孔徑泄漏的適情性擴(kuò)散模型,并總結(jié)出擴(kuò)散范圍函數(shù)。編制貓?zhí)哟┰皆凸艿酪缬蛿U(kuò)散范圍計算簡易軟件,為應(yīng)急維搶修決策的制定提供科學(xué)依據(jù)和指導(dǎo)。 論文以河流穿越原油管道所處水域環(huán)境為研究對象,在文獻(xiàn)調(diào)研和分析的基礎(chǔ)上,開展了以下幾方面的工作： (1)總結(jié)了流體力學(xué)理論、多孔介質(zhì)等基礎(chǔ)理論,分析了各種理論模型和仿真軟件的優(yōu)缺點與適用性,結(jié)合河流穿越原油管道的特點,確定選用流體力學(xué)軟件FLUENT進(jìn)行河流穿越管道溢油擴(kuò)散數(shù)值模擬。 (2)在現(xiàn)有河流穿越原油管道泄漏研究的基礎(chǔ)上,分別針對裸管泄漏和河底管道泄漏兩種情況,建立了不同泄漏孔徑的二維、三維數(shù)學(xué)模型和物理模型；考慮土壤多孔介質(zhì)問題和風(fēng)場影響,對各階段擴(kuò)散規(guī)律進(jìn)行分析。 (3)分析不同泄漏初始速度、不同水流速度、不同泄漏孔直徑、不同風(fēng)速、不同土壤顆粒有效直徑條件下油品擴(kuò)散不同階段的體積變化情況,分析各因素對原油泄漏擴(kuò)散范圍的變化規(guī)律。 (4)建立貓?zhí)哟┰皆凸艿拦こ绦孤⿺U(kuò)散模型,進(jìn)行仿真計算,總結(jié)出油品擴(kuò)散最大水平、豎直位移與泄漏時間的函數(shù)關(guān)系。 (5)預(yù)測靜風(fēng)和風(fēng)場情況下,7種不同孔徑范圍的原油水下、水面擴(kuò)散區(qū)域,編寫貓?zhí)哟┰焦艿烙推沸孤⿺U(kuò)散范圍計算簡易軟件。
[Abstract]:In this paper, we combine the theoretical research with the numerical simulation of FLUENT software for the diffusion process of river bottom soil, water body and water surface during the leakage and diffusion of the river through the crude oil pipeline. A general model of oil spill diffusion in each stage of river crossing crude oil pipeline is established. The main factors such as field wind speed, flow velocity, initial oil leakage velocity, leakage aperture and so on are analyzed. According to the actual situation of cat jump river crossing project, the suitable diffusion model of different aperture leakage is established, and the diffusion range function is summarized. A simple software for calculating the diffusion range of oil spill through crude oil pipeline is developed, which provides scientific basis and guidance for emergency maintenance decision making. On the basis of literature investigation and analysis, the following works are carried out in this paper: (1) the basic theories of fluid mechanics, porous media and so on are summarized. The advantages and disadvantages and applicability of various theoretical models and simulation software are analyzed. The fluid dynamics software FLUENT is chosen to simulate the oil spill diffusion in river crossing pipeline. (2) based on the existing research on the leakage of river through crude oil pipeline, the bare pipe leakage and the river bottom pipeline leakage are respectively aimed at two kinds of cases, one is the bare pipe leakage, the other is the river bottom pipeline leakage. Two and three dimensional mathematical models and physical models of different leakage pore sizes are established, and the diffusion laws of different stages are analyzed considering the problem of soil porous media and wind field. (3) different initial leakage velocities and different flow velocities are analyzed. Under the conditions of different leakage hole diameter, different wind speed and different effective diameter of soil particles, the volume changes of different stages of oil diffusion, The variation law of various factors on the range of oil leakage and diffusion is analyzed. (4) the model of leakage and diffusion of Maoxiaohe River crossing crude oil pipeline is established, and the simulation calculation is carried out, and the maximum level of oil product diffusion is summed up. The relationship between vertical displacement and leakage time. (5) predicting seven kinds of oil diffusion areas with different pore sizes under static wind and wind field, and compiling a simple software for calculating leakage diffusion range of oil products through pipeline by cat jump river.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE88
本文編號：2220884
[Abstract]:In this paper, we combine the theoretical research with the numerical simulation of FLUENT software for the diffusion process of river bottom soil, water body and water surface during the leakage and diffusion of the river through the crude oil pipeline. A general model of oil spill diffusion in each stage of river crossing crude oil pipeline is established. The main factors such as field wind speed, flow velocity, initial oil leakage velocity, leakage aperture and so on are analyzed. According to the actual situation of cat jump river crossing project, the suitable diffusion model of different aperture leakage is established, and the diffusion range function is summarized. A simple software for calculating the diffusion range of oil spill through crude oil pipeline is developed, which provides scientific basis and guidance for emergency maintenance decision making. On the basis of literature investigation and analysis, the following works are carried out in this paper: (1) the basic theories of fluid mechanics, porous media and so on are summarized. The advantages and disadvantages and applicability of various theoretical models and simulation software are analyzed. The fluid dynamics software FLUENT is chosen to simulate the oil spill diffusion in river crossing pipeline. (2) based on the existing research on the leakage of river through crude oil pipeline, the bare pipe leakage and the river bottom pipeline leakage are respectively aimed at two kinds of cases, one is the bare pipe leakage, the other is the river bottom pipeline leakage. Two and three dimensional mathematical models and physical models of different leakage pore sizes are established, and the diffusion laws of different stages are analyzed considering the problem of soil porous media and wind field. (3) different initial leakage velocities and different flow velocities are analyzed. Under the conditions of different leakage hole diameter, different wind speed and different effective diameter of soil particles, the volume changes of different stages of oil diffusion, The variation law of various factors on the range of oil leakage and diffusion is analyzed. (4) the model of leakage and diffusion of Maoxiaohe River crossing crude oil pipeline is established, and the simulation calculation is carried out, and the maximum level of oil product diffusion is summed up. The relationship between vertical displacement and leakage time. (5) predicting seven kinds of oil diffusion areas with different pore sizes under static wind and wind field, and compiling a simple software for calculating leakage diffusion range of oil products through pipeline by cat jump river.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE88
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