室內(nèi)燃?xì)庑孤⿺U(kuò)散模擬及爆炸后果分析
發(fā)布時(shí)間：2018-03-07 09:28
本文選題：室內(nèi)燃?xì)庑孤?/strong> 切入點(diǎn)：擴(kuò)散 出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文 論文類型：學(xué)位論文
【摘要】：能源問(wèn)題,一直是左右經(jīng)濟(jì)的大問(wèn)題。隨著石油資源的日益減少,天然氣由于其巨大的儲(chǔ)量,以及其清潔性,開(kāi)始受到人們的重視,越來(lái)越多的居民用戶開(kāi)始選擇天然氣作為主要能源。天然氣給人們帶來(lái)便利的同時(shí),也不可避免的帶來(lái)危險(xiǎn)。天然氣是一種可燃?xì)怏w,通過(guò)燃?xì)夤艿阑蛘呷細(xì)庠?都有可能造成泄漏,泄漏的燃?xì)庠谑覂?nèi)發(fā)生擴(kuò)散,天然氣的濃度值會(huì)增大到爆炸下限,在有點(diǎn)火源的情況下,會(huì)引爆泄漏的燃?xì)?從而發(fā)生爆炸,這將對(duì)建筑物以及室內(nèi)人員造成難以挽回的損失。所以,研究室內(nèi)燃?xì)庑孤⿺U(kuò)散規(guī)律,分析爆炸之后的危險(xiǎn)效應(yīng),對(duì)燃?xì)夤芫W(wǎng)正常運(yùn)行以及居民安全用氣的作用是非常大的。本文研究的是室內(nèi)發(fā)生燃?xì)庑孤┑墓r,利用數(shù)值模擬的方法,對(duì)該工況進(jìn)行模擬,得到不同影響因素下的擴(kuò)散規(guī)律,并對(duì)發(fā)生爆炸的后果進(jìn)行計(jì)算分析。主要過(guò)程如下:總結(jié)和比較現(xiàn)有燃?xì)庑孤┖蛿U(kuò)散模型,結(jié)合本文工況,建立合適數(shù)學(xué)模型;建立包括三大基本方程、組分輸運(yùn)方程以及混合氣體密度方程的燃?xì)庑孤⿺U(kuò)散基本方程組,應(yīng)用有限體積法進(jìn)行離散化處理,湍流模型為考慮浮力修正的k~ε模型,應(yīng)用FLUENT軟件對(duì)燃?xì)怆p眼灶灶孔發(fā)生泄漏事故進(jìn)行數(shù)值模擬;通過(guò)改變泄漏時(shí)間、泄漏速度、窗戶入風(fēng)、窗戶開(kāi)度以及泄漏氣體得到不同影響因素下,室內(nèi)燃?xì)夥植家?guī)律;泄漏房間發(fā)生爆炸后,按照天然氣最低濃度值為2%,進(jìn)行了危險(xiǎn)區(qū)域的劃分,應(yīng)用TNT當(dāng)量法對(duì)爆炸后果計(jì)算,應(yīng)用超壓準(zhǔn)則,分析其對(duì)建筑物以及室內(nèi)人員所造成的傷害。本文在現(xiàn)有研究的基礎(chǔ)上,對(duì)影響燃?xì)鈹U(kuò)散規(guī)律的多種因素進(jìn)行了分析,應(yīng)用數(shù)值模擬的方法,得到了不同影響因素下室內(nèi)燃?xì)鈹U(kuò)散規(guī)律;利用工程理論的方法,對(duì)爆炸后果進(jìn)行了計(jì)算,這對(duì)居民安全用氣以及工程上對(duì)于爆炸效應(yīng)的計(jì)算都有借鑒意義。
[Abstract]:With the decreasing of oil resources, natural gas is getting more and more attention because of its huge reserves and its cleanliness. More and more residents begin to choose natural gas as the main energy source. While natural gas brings convenience to people, it inevitably brings danger. Natural gas is a kind of combustible gas that passes through gas pipelines or gas stoves. It is possible to cause a leak, the leaking gas will spread indoors, the concentration of the natural gas will increase to the lower limit of the explosion, and if there is a fire source, the leaked gas will be detonated, and the explosion will occur. This will cause irreparable damage to buildings and interior personnel. Therefore, the study of indoor gas leakage and diffusion law, analysis of the dangerous effects after the explosion, It is very important to the normal operation of the gas pipeline network and the safety of the residents. In this paper, the working condition of gas leakage in the room is studied, and the numerical simulation method is used to simulate the working condition. The main process is as follows: summarize and compare the existing gas leakage and diffusion models, and establish the appropriate mathematical model combined with the working conditions in this paper; The basic equations of gas leakage and diffusion including three basic equations, component transport equations and mixed gas density equations are established. The finite volume method is used to discretize the equations. The turbulence model is a k- 蔚 model considering buoyancy correction. FLUENT software was used to simulate the leakage accident of gas binocular stove hole, and the indoor gas distribution was obtained by changing the leakage time, leakage velocity, window entry air, window opening and leakage gas. After the explosion occurred in the leaking room, the dangerous area was divided according to the minimum gas concentration of 2, and the TNT equivalent method was applied to calculate the explosion consequence, and the overpressure criterion was applied. On the basis of the existing research, this paper analyzes many factors that affect the gas diffusion law, and applies the numerical simulation method. The diffusion law of indoor gas under different influence factors is obtained, and the consequences of explosion are calculated by using the method of engineering theory, which can be used for reference in the calculation of safety gas for residents and for the calculation of explosion effect in engineering.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU996.9
【引證文獻(xiàn)】
相關(guān)會(huì)議論文 前1條
1 龐磊;呂良海;姚偉;;不同燃?xì)鉂舛认率覂?nèi)燃?xì)獗蓟鹧娌胺秶植继卣鱗A];2012中國(guó)消防協(xié)會(huì)科學(xué)技術(shù)年會(huì)論文集（上）[C];2012年
，本文編號(hào)：1578850
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