本文選題：安全工程　切入點：車庫　出處：《安全與環(huán)境學(xué)報》2017年05期

【摘要】：為研究車庫內(nèi)氫氣連續(xù)性泄漏的濃度分布和聚集狀態(tài),采用ICEM-CFD軟件建模,利用Fluent軟件對氫氣連續(xù)性泄漏過程進行了模擬。通過分析監(jiān)測點氫氣物質(zhì)的量分?jǐn)?shù)、氫氣分布和可燃性區(qū)域體積分?jǐn)?shù),研究了橫梁及其間距(L)、自然通風(fēng)、通風(fēng)口面積(A)對車庫內(nèi)氫氣的擴散和分布狀態(tài)的影響。結(jié)果表明:在密閉狀態(tài)下,無橫梁時可燃性區(qū)域最小,L=3 m時可燃性區(qū)域最大;當(dāng)A=0.5 m2時,在自然通風(fēng)的作用下,車庫底部氫氣物質(zhì)的量分?jǐn)?shù)明顯下降,但車庫中部和上部氫氣物質(zhì)的量分?jǐn)?shù)與密閉時相近;當(dāng)A=1 m2時,雖然初始階段氫氣物質(zhì)的量分?jǐn)?shù)上升很快,但很快就趨于穩(wěn)定,監(jiān)測點氫氣物質(zhì)的量分?jǐn)?shù)均在爆炸下限以下,此時自然通風(fēng)能夠消除氫氣爆炸的風(fēng)險。
[Abstract]:In order to study the concentration distribution and accumulation state of continuous leakage of hydrogen in garage, ICEM-CFD software was used to model the process of continuous leakage of hydrogen, and Fluent software was used to simulate the process of continuous leakage of hydrogen. The effects of crossbeam and its spacing, natural ventilation and vent area A) on the diffusion and distribution of hydrogen in the garage were studied. When there is no cross beam, the combustible region is the biggest when the minimum value of fuel is 3 m, and the quantity fraction of hydrogen in the bottom of the garage decreases obviously under the action of natural ventilation, but the fraction of hydrogen in the middle and upper part of the garage is similar to that in the closed garage. When the concentration of hydrogen is 1 m ~ 2, the hydrogen content increases rapidly at the initial stage, but it tends to be stable soon, and the hydrogen content at the monitoring point is below the lower limit of explosion. At this time, natural ventilation can eliminate the risk of hydrogen explosion.
【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;
【分類號】：X932
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本文編號：1694111