本文選題：通風(fēng)散煙 + 三維數(shù)值模擬�。� 參考：《人民黃河》2017年06期

【摘要】：通風(fēng)散煙是水利水電工程長(zhǎng)大隧洞施工中的重要環(huán)節(jié)。傳統(tǒng)的施工通風(fēng)設(shè)計(jì)沒(méi)有考慮污染物的排放過(guò)程等,負(fù)壓風(fēng)機(jī)的設(shè)計(jì)多依賴經(jīng)驗(yàn),常出現(xiàn)施工通風(fēng)效果不佳的問(wèn)題。采用計(jì)算流體力學(xué)軟件FLUENT進(jìn)行長(zhǎng)大隧道通風(fēng)散煙三維數(shù)值模擬,研究不同負(fù)壓風(fēng)機(jī)風(fēng)量對(duì)獨(dú)頭掘進(jìn)的長(zhǎng)大隧洞施工有害氣體排放特性的影響,提出了隧洞負(fù)壓風(fēng)機(jī)實(shí)際工作流量與正壓風(fēng)機(jī)實(shí)際工作流量比值為1.1~1.3時(shí),對(duì)隧洞內(nèi)有害氣體排出最有利。同時(shí),結(jié)合隧洞掘進(jìn)過(guò)程中風(fēng)機(jī)實(shí)際工作狀態(tài),從保證隧洞在掘進(jìn)到不同長(zhǎng)度時(shí)都有較好通風(fēng)條件的角度,提出了以掘進(jìn)長(zhǎng)度1 km時(shí)負(fù)壓與正壓風(fēng)機(jī)實(shí)際工作流量比為1.1為控制的長(zhǎng)大隧洞負(fù)壓風(fēng)機(jī)風(fēng)量設(shè)計(jì)方法。
[Abstract]:Ventilating and dispersing gas is an important link in the construction of long tunnel of water conservancy and hydropower project.The traditional construction ventilation design does not consider the pollutant discharge process, the negative pressure fan design depends on the experience, often has the construction ventilation effect not to be good the question.Using the computational fluid dynamics software FLUENT to simulate the ventilation and smoke emission of long and long tunnel, the influence of different negative pressure fan air volume on the harmful gas emission characteristics in the construction of long tunnel with single head tunneling is studied.When the ratio of actual working flow of negative pressure fan and actual working flow of positive pressure fan is 1.1 ~ 1.3, it is most favorable for the discharge of harmful gas in tunnel.At the same time, considering the actual working condition of the fan in the tunneling process, from the point of view of ensuring that the tunnel has better ventilation conditions during tunneling to different lengths,A design method of air volume of negative pressure fan in long tunnel is presented, which is controlled by the actual working flow ratio of negative pressure fan to positive pressure fan at 1 km driving length.
【作者單位】： 四川大學(xué)水利水電學(xué)院;
【分類(lèi)號(hào)】：TV554
，

本文編號(hào)：1745353