本文選題：核電火災(zāi) + 火源模型修正　； 參考：《核科學(xué)與工程》2017年05期

【摘要】：針對(duì)核電廠防火設(shè)計(jì)中使用的火災(zāi)區(qū)域模型模擬軟件CFAST(Consolidated Model of Fire Growth and Smoke Transport)在火源模型方面的缺陷,提出耦合火源與熱煙氣層的熱反饋相互作用的火源計(jì)算模型。為了驗(yàn)證新的火源功率計(jì)算模型的可靠性,基于核電廠保守性原則,分別進(jìn)行了開(kāi)放空間和封閉空間內(nèi)橫向四層電纜橋架電纜燃燒火災(zāi)實(shí)驗(yàn)。通過(guò)比較模型預(yù)測(cè)的火源功率和溫度與實(shí)驗(yàn)測(cè)量值得到:相對(duì)于現(xiàn)有的區(qū)域模型軟件的火源計(jì)算模型,新的火源功率計(jì)算模型使得整個(gè)火災(zāi)過(guò)程中火源的熱釋放速率預(yù)測(cè)精確度提高了11%;特別是在電纜火焰橫向蔓延階段,精確度提高了24.7%。更重要的是:因?yàn)閰^(qū)域模型軟件CFAST火源計(jì)算模型忽略了煙氣的熱反饋?zhàn)饔?導(dǎo)致其基于開(kāi)放空間火源熱釋放速率測(cè)量值計(jì)算的熱煙氣層溫度小于實(shí)驗(yàn)測(cè)量值,該溫度數(shù)據(jù)如用于防火設(shè)計(jì)將導(dǎo)致缺乏保守性;而修正后的火源計(jì)算模型通過(guò)耦合火源與熱煙氣層熱反饋的相互作用,使得溫度計(jì)算結(jié)果趨勢(shì)性的大于實(shí)驗(yàn)測(cè)量值,使得預(yù)測(cè)結(jié)果趨于精確和保守。
[Abstract]:Aiming at the defects of the fire source model simulation software CFAST(Consolidated Model of Fire Growth and Smoke Transport) used in the fire prevention design of nuclear power plant, a fire source calculation model for coupling the thermal feedback interaction between the fire source and the hot flue gas layer is proposed. In order to verify the reliability of the new fire source power calculation model, based on the conservatism principle of nuclear power plant, the fire experiments of transverse four-layer cable bridge cable in open space and in closed space were carried out. By comparing the predicted power and temperature of the fire source with the experimental measurements, it is obtained that compared with the existing regional model software, the calculation model of the fire source is obtained. The new power calculation model improves the accuracy of heat release rate prediction in the whole fire process by 11 percent, especially in the transverse spread of the cable flame, the accuracy of which is improved by 24.7. More importantly, because the regional model software CFAST fire source calculation model neglects the heat feedback effect of smoke, the temperature of hot flue gas layer calculated based on the measurement value of heat release rate of open space fire source is smaller than the experimental value. If the temperature data is used in the fire prevention design, it will lead to a lack of conservatism, and the modified fire source calculation model can make the temperature calculation result trend larger than the experimental measured value by coupling the fire source with the thermal feedback of the hot flue gas layer. The prediction results tend to be accurate and conservative.
【作者單位】： 廣州中國(guó)科學(xué)院工業(yè)技術(shù)研究院核電火災(zāi)安全聯(lián)合實(shí)驗(yàn)室;中廣核工程有限公司;中國(guó)科學(xué)技術(shù)大學(xué)火災(zāi)科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【分類(lèi)號(hào)】：TM623;TU998.1

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