本文選題：預(yù)混氣體 + 火焰前鋒��； 參考：《工業(yè)安全與環(huán)�！�2017年11期

【摘要】：為揭示障礙物對(duì)于火焰?zhèn)鞑ミ^(guò)程中的激勵(lì)作用,采用Zimont火焰面模型對(duì)內(nèi)置不同阻塞率障礙物的密閉管道內(nèi)天然氣-空氣預(yù)混氣體的燃爆過(guò)程進(jìn)行數(shù)值模擬,結(jié)果表明障礙物對(duì)于天然氣燃爆過(guò)程中火焰?zhèn)鞑サ募?lì)作用明顯,火焰?zhèn)鞑ソ?jīng)歷了從層流向湍流的轉(zhuǎn)變過(guò)程,70%阻塞率時(shí)激勵(lì)作用達(dá)到最大,火焰前鋒速度達(dá)到了1 156 m/s,管道內(nèi)最大爆炸壓力達(dá)到1.02 MPa;火焰?zhèn)鞑ブ琳系K物處時(shí),不同阻塞率障礙物場(chǎng)中湍流動(dòng)能峰值變化趨勢(shì)基本一致,且高湍流動(dòng)能區(qū)的分布與湍流動(dòng)能峰值發(fā)生劇烈變化。
[Abstract]:In order to reveal the exciting effect of obstacles on flame propagation, the Zimont flame surface model is used to simulate the explosion process of natural gas / air premixed gas in a closed pipe with different blocking rates. The results show that the barrier has an obvious effect on the flame propagation in the process of natural gas explosion, and the maximum incentive effect is obtained when the flame propagates through the transition from layer to turbulence with a blocking rate of 70%. The velocity of flame front reaches 1 156 m / s and the maximum explosion pressure in the pipe reaches 1 02 MPA. When the flame propagates to the barrier, the peak value of turbulent kinetic energy in the barrier field with different blocking rates is basically the same. Moreover, the distribution of turbulent kinetic energy and the peak value of turbulent kinetic energy change dramatically.
【作者單位】： 常州大學(xué)江蘇省油氣儲(chǔ)運(yùn)技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：建筑消防工程技術(shù)公安部重點(diǎn)實(shí)驗(yàn)室開(kāi)放課題(KFKT2014MS02);建筑消防工程技術(shù)公安部重點(diǎn)實(shí)驗(yàn)室開(kāi)放課題(KFKT2015ZD03) 常州市科技支撐計(jì)劃項(xiàng)目(CE20155025) 公安部科技強(qiáng)警基礎(chǔ)工作專項(xiàng)(2014GABJC047);公安部消防局科研計(jì)劃項(xiàng)目(2015XFR 22) 江蘇省高校自然科學(xué)研究重大項(xiàng)目(16KJA170004)
【分類號(hào)】：TE88

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