【摘要】：結(jié)合氣體爆炸傳播機理,利用FLACS軟件對泄壓點火不同端兩種方式(泄壓口通徑為25 mm和泄壓口完全開放)下甲烷的爆炸過程進(jìn)行數(shù)值模擬,獲得了5種體積分?jǐn)?shù)甲烷的爆炸特性參數(shù),分析得出:兩種不同泄壓方式下,10%,9.5%,11%體積分?jǐn)?shù)的甲烷爆炸特性變化趨勢接近,7%,8%的甲烷較前三者有所延遲;5種甲烷在管道中心處的最大爆炸壓力、最大爆炸壓力上升速率、最大爆炸壓力下降速率、溫度峰值都隨甲烷體積分?jǐn)?shù)的增大而逐漸上升,在10%時達(dá)到最大,繼續(xù)增加甲烷體積分?jǐn)?shù)則出現(xiàn)下降趨勢,最大爆炸壓力時間變化趨勢與其相反;管道中心處的爆炸產(chǎn)物濃度隨著甲烷體積分?jǐn)?shù)的增大而增大,與泄壓方式無關(guān);增大管道泄壓口面積有利于爆炸壓力以及爆炸高溫高壓氣體的釋放,使得各體積分?jǐn)?shù)甲烷的最大爆炸壓力、最大爆炸壓力上升速率、最大爆炸壓力下降速率、溫度峰值均下降,到達(dá)最大爆炸壓力的時間均增大。
[Abstract]:Combined with the mechanism of gas explosion propagation, the explosion process of methane was simulated by using FLACS software in two different ways (the outlet diameter was 25 mm and the outlet was completely open). The explosion characteristic parameters of 5 kinds of volume fraction methane are obtained. The results show that under two different pressure relief methods, the change trend of methane explosion characteristic of 10% volume fraction of 9.5wt% volume fraction is close to that of 7%, 8% of methane was delayed compared with the former three. The maximum explosion pressure at the center of the pipeline, the maximum explosion pressure rise rate, the maximum explosion pressure drop rate, and the temperature peak value rise with the increase of the volume fraction of methane, and reach the maximum at 10. When the volume fraction of methane continues to increase, there is a downward trend, and the time variation trend of maximum explosion pressure is opposite to that of methane. The concentration of the explosive product in the center of the pipeline increases with the increase of methane volume fraction, which has nothing to do with the pressure relief mode. Increasing the pressure relief area of the pipeline is beneficial to the explosion pressure and the release of the explosion gas at high temperature and high pressure. The maximum explosion pressure, the maximum explosion pressure rise rate, the maximum explosion pressure drop rate and the temperature peak value of each volume fraction of methane are all decreased. The time to reach the maximum explosion pressure increases.
【作者單位】： 西安科技大學(xué)安全科學(xué)與工程學(xué)院;西部礦井開采及災(zāi)害防治教育部重點實驗室;西部煤礦安全教育部工程研究中心;
【基金】：國家自然科學(xué)基金(51674193) 陜西省科技攻關(guān)項目(2015SF280) 西安科技大學(xué)博士啟動基金(2013QDJ048)
【分類號】：O643.22;X932

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