本文關(guān)鍵詞：列車著火后繼續(xù)在隧道中行駛的煙氣特性　出處：《華南理工大學(xué)學(xué)報(bào)(自然科學(xué)版)》2016年06期 　論文類型：期刊論文

  更多相關(guān)文章： 地鐵隧道 列車火災(zāi) 煙氣特性 數(shù)值模擬 熱釋放速率 溫度

【摘要】：保障隧道列車著火后繼續(xù)向前行駛的安全性是火災(zāi)應(yīng)急救援的目標(biāo).文中采用計(jì)算流體動(dòng)力學(xué)方法,使用STAR-CCM+軟件的滑移網(wǎng)格功能,研究了不同列車行駛速度和火源熱釋放速率對(duì)隧道內(nèi)煙氣特性的影響,得到列車攜帶火源在隧道內(nèi)行駛時(shí)煙氣溫度的分布規(guī)律和最佳行駛速度.結(jié)果表明:隧道列車著火后繼續(xù)向前行駛時(shí),存在一個(gè)使溫度達(dá)到最低的最佳行駛速度50km/h;當(dāng)列車運(yùn)行速度恒定時(shí),火災(zāi)熱釋放速率越大,人眼高度處的最高溫度也越高;熱釋放速率恒定時(shí),最高溫度隨著列車行駛速度的增大先減小后增大,呈開口向上的拋物線形狀;隨著著火列車向前運(yùn)行,列車車頂進(jìn)風(fēng)口的最高溫度逐漸上升,在隧道橫斷面的中性面上,最高溫度值有較大的振蕩;在隧道內(nèi)340 m處溫度最低,但是也達(dá)到了166.45℃.列車頂部區(qū)域的溫度過高,可能會(huì)被燒毀性破壞,因此可考慮在列車著火后繼續(xù)向前運(yùn)動(dòng)的同時(shí)給隧道通風(fēng),以降低環(huán)形空間的溫度.
[Abstract]:The aim of fire emergency rescue is to ensure the safety of tunnel train moving forward after fire. In this paper, the method of computational fluid dynamics (CFD) and the sliding grid function of STAR-CCM software are used. The influence of different train speed and heat release rate of fire source on flue gas characteristics in tunnel is studied. The distribution of flue gas temperature and the optimum driving speed are obtained when the train carries the fire source in the tunnel. The results show that the tunnel train continues to move forward after the fire. There is an optimum speed of 50 km / h for the lowest temperature; When the train speed is constant, the higher the fire heat release rate, the higher the maximum temperature at the eye height. When the heat release rate is constant, the maximum temperature decreases first and then increases with the increase of train speed, and then increases in the shape of parabola with the opening up. With the fire train running forward, the maximum temperature of the roof inlet of the train rises gradually, and the maximum temperature oscillates greatly on the neutral surface of the tunnel cross section. The temperature is the lowest at 340 m in the tunnel, but it also reaches 166.45 鈩，

本文編號(hào)：1363798