本文選題：隧道火災(zāi) + 數(shù)值模擬��； 參考：《鄭州大學(xué)學(xué)報(bào)(工學(xué)版)》2017年01期

【摘要】：當(dāng)發(fā)生隧道火災(zāi)時(shí),縱向通風(fēng)方式常被用于人員疏散和排煙,而縱向風(fēng)速較大時(shí),煙氣將發(fā)生分岔流動(dòng),導(dǎo)致煙氣層整體性被破壞,對(duì)人員疏散造成威脅.火源橫向位置對(duì)隧道火災(zāi)煙氣流動(dòng)有顯著影響,通過數(shù)值模擬對(duì)不同火源橫向位置時(shí)煙氣分岔流動(dòng)特性進(jìn)行了研究.結(jié)果表明,隨著火源向側(cè)壁靠近,煙氣由對(duì)稱型分岔流動(dòng)轉(zhuǎn)變?yōu)椴粚?duì)稱分岔流動(dòng).當(dāng)火災(zāi)發(fā)生在側(cè)壁附近時(shí),煙氣轉(zhuǎn)變?yōu)?S"型流動(dòng).隨著火源與側(cè)壁間距的減小,分岔流動(dòng)臨界風(fēng)速呈指數(shù)型增加.
[Abstract]:When tunnel fire occurs, longitudinal ventilation is often used to evacuate people and exhaust smoke. When the longitudinal wind speed is high, the flue gas will be bifurcation and flow, which will lead to the destruction of the integrity of the flue gas layer and threaten the evacuation of people. The lateral position of fire source has a significant effect on the smoke flow in tunnel fire. Numerical simulation is used to study the characteristics of flue gas bifurcation under different transverse positions of fire source. The results show that the flow of flue gas changes from symmetric bifurcation to asymmetric bifurcation as the fire source approaches the lateral wall. When the fire occurred near the side wall, the smoke changed into "S" type flow. With the decrease of the distance between the fire source and the side wall, the critical velocity of bifurcation flow increases exponentially.
【作者單位】： 鄭州大學(xué)力學(xué)與工程科學(xué)學(xué)院;建筑安全與環(huán)境國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51404215) 國家博士后基金特別資助項(xiàng)目(2015T80781) 建筑安全與環(huán)境國家重點(diǎn)實(shí)驗(yàn)室開放課題(BSBE2015-02)
【分類號(hào)】：U458

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 王楚雄;楊涵青;;舵位橫向位置變化對(duì)高速船舶回轉(zhuǎn)圈的影響[J];武漢造船(武漢造船工程學(xué)會(huì)會(huì)刊);1989年03期

，

本文編號(hào)：1921599