本文選題：車廂火災(zāi) + 機械排煙　； 參考：《中國安全生產(chǎn)科學(xué)技術(shù)》2017年02期

【摘要】：為了揭示車廂內(nèi)部火災(zāi)煙氣在不同防排煙方式下的遷移特征,優(yōu)化選擇最優(yōu)防排煙方式,運用火災(zāi)動力學(xué)軟件FDS對CRH2A動車組的一節(jié)車廂進行模擬計算。分別采用機械排煙系統(tǒng)、空氣幕系統(tǒng)及二者復(fù)合系統(tǒng)對車廂內(nèi)煙氣進行控制,對比分析不同排煙系統(tǒng)下車廂內(nèi)煙氣溫度、煙氣層高度和煙氣濃度的變化規(guī)律。結(jié)果表明:隨著排煙量的增加排煙效果顯著增大,但排煙量不宜過大,當固定功率為0.2 MW時,V_2=0.87 m~3/s排煙效果最佳;空氣幕在一定程度上可以阻擋煙氣蔓延至相鄰車廂,機械排煙在降低煙氣溫度與濃度方面的效果比空氣幕系統(tǒng)明顯;每個獨立系統(tǒng)的控?zé)熜Чh不及二者復(fù)合系統(tǒng)效果明顯。綜合考慮防排煙的有效性和經(jīng)濟性,在本文設(shè)定工況下,V_1=1.12 m~3/s、V_2=1.62 m~3/s為最優(yōu)防排煙組合方式。
[Abstract]:In order to reveal the characteristics of fire smoke migration in different smoke control and exhaust modes and to optimize the optimal smoke prevention and exhaust mode, the fire dynamics software FDS was used to simulate and calculate one compartment of CRH2A EMU. The mechanical smoke exhaust system, the air curtain system and the combined system were used to control the smoke in the compartments, and the variation rules of the smoke temperature, the height of the flue gas layer and the smoke concentration under the different exhaust systems were compared and analyzed. The results show that the effect of exhaust smoke is obviously increased with the increase of the amount of exhaust smoke, but the amount of exhaust smoke should not be too large. When the fixed power is 0.2 MW, the exhaust effect is the best when the fixed power is 0.2 MW / 0.87 mm2 / s, and the air curtain can to some extent prevent the smoke from spreading to the adjacent compartments. The effect of mechanical smoke exhaust on reducing smoke temperature and concentration is more obvious than that of air curtain system, and the effect of smoke control in each independent system is far less than that of the composite system. Considering the efficiency and economy of smoke prevention and exhaust, the optimal combination of smoke prevention and exhaust was found in this paper under the working condition of 1.12 mv / s / s = 1.62 m/ s.
【作者單位】： 河南理工大學(xué)安全科學(xué)與工程學(xué)院;重慶大學(xué)煤礦災(zāi)害動力學(xué)與控制國家重點實驗室;
【基金】：國家自然科學(xué)基金(U1361205,51404090,51574111) 煤礦災(zāi)害動力學(xué)與控制國家重點實驗室自主研究課題(2011DA105287-ZD201401)
【分類號】：U298.4

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