本文關(guān)鍵詞： 障礙物 半密閉空間 大渦模擬 油氣 湍流 混合物 實(shí)驗(yàn)驗(yàn)證　出處：《化工學(xué)報(bào)》2017年11期 　論文類(lèi)型：期刊論文

【摘要】：針對(duì)置障條件下容積式半密閉空間內(nèi)油氣著火爆炸特性進(jìn)行了研究,通過(guò)高速攝影等技術(shù)手段對(duì)爆炸過(guò)程中火焰形態(tài),爆炸超壓特性進(jìn)行了實(shí)驗(yàn),并對(duì)實(shí)驗(yàn)進(jìn)行了大渦模擬,精確模擬了火焰與障礙物相互作用時(shí)的火焰形態(tài),流場(chǎng)結(jié)構(gòu),超壓特性,與實(shí)驗(yàn)進(jìn)行了對(duì)比分析。結(jié)果表明:障礙物的存在會(huì)使火焰結(jié)構(gòu)發(fā)生變化,出現(xiàn)半球形圓錐形毛刷形的轉(zhuǎn)變,并在障礙物下游由于未燃?xì)怏w的卷吸產(chǎn)生火焰旋渦;爆炸超壓峰值的產(chǎn)生是燃燒速度與泄壓速度相互耦合作用的結(jié)果,在油氣爆炸過(guò)程中,障礙物的存在會(huì)導(dǎo)致燃燒速度以及泄壓速度的變化,進(jìn)而對(duì)超壓峰值產(chǎn)生一定的影響。
[Abstract]:In this paper, the characteristics of oil and gas ignition and explosion in the volumetric semi-closed space under the condition of barrier setting are studied. The flame morphology and explosion overpressure characteristics in the explosion process are tested by means of high-speed photography, and the experimental results are simulated by large eddy. The flame shape, flow field structure, overpressure characteristics of the flame interacting with an obstacle are accurately simulated and compared with the experimental results. The results show that the flame structure changes with the existence of the barrier. The change of the hemispherical conical brush shape occurs, and the flame vortex is produced in the downstream of the obstacle due to the entrainment of the gas body, and the peak value of the explosion overpressure is the result of the interaction between the combustion velocity and the pressure relief velocity, and in the process of oil and gas explosion, The existence of obstacles will lead to the change of combustion speed and pressure relief velocity, which will have a certain effect on the peak value of overpressure.
【作者單位】： 陸軍勤務(wù)學(xué)院油料系;陸軍72489部隊(duì);
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51276195)~~
【分類(lèi)號(hào)】：TE88

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