發(fā)布時間：2019-05-10 16:31

【摘要】：為研究扁平型空間火災(zāi)頂棚射流特性,在一長15 m、寬11 m、高4.6 m的扁平空間內(nèi)進行了實驗與數(shù)值模擬,空間內(nèi)強制通風(fēng)對火源熱釋放率為100~500 kW的火災(zāi)頂棚射流溫度變化影響。研究發(fā)現(xiàn)了空間內(nèi)通風(fēng)、障礙物和門開口都會對頂棚射流溫度產(chǎn)生擾動;通風(fēng)對頂棚射流降溫作用在火源熱釋放率小于200 kW的火災(zāi)場景和遠離火源的區(qū)域更明顯,而通風(fēng)對上壁面附近最高溫度所在位置并沒有明顯的影響;同時,通風(fēng)并未改變頂棚射流以近似指數(shù)形式降低的規(guī)律,但會加速溫度的下降速率,可使溫度衰減系數(shù)最大提高近2倍。
[Abstract]:In order to study the characteristics of fire roof jet in flat space, experiments and numerical simulations were carried out in a flat space with a length of 15 m, a width of 11 m and a height of 4.6 m. The effect of forced ventilation in space on the temperature change of fire ceiling jet with heat release rate of 100 脳 500 kW. It is found that ventilation in space, obstacles and door opening will disturb the temperature of ceiling jet. The effect of ventilation on the cooling of ceiling jet is more obvious in the fire scene where the heat release rate of the fire source is less than 200 kW and in the area far from the fire source, but the ventilation has no obvious effect on the position of the highest temperature near the upper wall. At the same time, ventilation does not change the law that the ceiling jet decreases in the form of approximate index, but it will accelerate the temperature drop rate and increase the temperature attenuation coefficient by nearly 2 times.
【作者單位】： 中國船舶重工集團公司第七一三研究所;哈爾濱工程大學(xué)航天與建筑工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51676051) 中央高�；究蒲袠I(yè)務(wù)費專項基金項目(HEUCF160201)
【分類號】：TU998.1

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1 端木維可;細水霧幕抑制狹長空間頂棚射流火焰研究[D];鄭州大學(xué);2017年

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