本文選題：管道 + 氫氣�。� 參考：《中國安全生產(chǎn)科學(xué)技術(shù)》2017年04期

【摘要】：為了研究管道內(nèi)氫氣的爆燃轉(zhuǎn)爆轟及其抑制過程,對單個障礙物管道中氫氣-空氣混合物燃爆過程以及多級泄爆進行了二維數(shù)值模擬。基于氫氣-空氣19步詳細(xì)化學(xué)反應(yīng)動力學(xué)機理,以及k-ε湍流模型、概率密度函數(shù)輸運方程和同位網(wǎng)格SIMPLE算法,采用計算流體軟件Fluent進行模擬。結(jié)果表明:密閉管道無泄爆時,在距點火端1.5 m左右爆燃轉(zhuǎn)為爆轟;泄爆口的位置對管道內(nèi)氫氣-空氣預(yù)混氣體的爆炸參數(shù)有重要影響,泄爆口位于管道中部時,能降低管道內(nèi)爆轟超壓,泄爆效果較好;位于管道中部單個泄爆口泄爆時,有效降低爆轟超壓,管道中部設(shè)置2個泄爆口時,能通過壓力和混合氣體的泄放將管道中已經(jīng)發(fā)生的爆轟衰減為爆燃;當(dāng)有3個泄爆口泄爆時,管道中沒有發(fā)生爆轟,達(dá)到良好的泄爆效果。
[Abstract]:In order to study the deflagration to detonation process and its suppression process of hydrogen gas in a single barrier pipe, a two-dimensional numerical simulation was carried out for the combustion process of a mixture of hydrogen and air in a single obstacle pipe and the multi-stage explosion. Based on the detailed chemical reaction kinetic mechanism of 19 steps of hydrogen and air, the K- 蔚 turbulence model, the transport equation of probability density function and the simple algorithm of in-situ grid, the computational fluid software fluent is used to simulate the chemical reaction. The results show that the detonation becomes detonation at about 1.5 m from the igniting end when there is no venting in the airtight pipeline, and the location of the vent has an important effect on the explosion parameters of the hydrogen-air premixed gas in the pipeline, and the vent is located in the middle of the pipeline. It can reduce the detonation overpressure in the pipeline, and it can reduce the detonation overpressure effectively when it is located in the middle of the pipeline with a single venting outlet, and when the middle part of the pipeline is set up with two venting openings, the detonation overpressure can be reduced effectively. The detonation occurred in the pipeline can be attenuated to deflagration through the release of pressure and mixed gas, and no detonation occurs in the pipeline when there are three venting holes, which can achieve a good venting effect.
【作者單位】： 南京工業(yè)大學(xué)安全科學(xué)與工程學(xué)院;江蘇省危險化學(xué)品本質(zhì)安全與控制技術(shù)重點實驗室;
【基金】：國家重點研發(fā)計劃項目(2016YFC0800102) 國家自然科學(xué)基金重點項目(21436006)
【分類號】：X932
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本文編號：2107480