矩形泄漏孔水平喷射火热辐射研究

发布时间：2018-05-12 19:58

  本文选题：喷射火 + 矩形泄漏孔　； 参考：《中国安全科学学报》2017年06期

【摘要】：为研究矩形泄漏孔水平喷射火的热辐射分布,首先采用火灾动态模拟软件(FDS)模拟具有相同面积的正方形和长方形泄漏孔下13种不同泄漏速度的喷射火,监测喷射火的热辐射数据和伤害半径;然后运用Thornton模型计算热辐射值和伤害半径,添加矩形泄漏孔长宽比因子至模型中,根据模拟结果修正Thornton模型。研究得出:热辐射的Thornton模型预测值和模拟值变化趋势一致,但Thornton模型预测值更大;修正后的Thornton模型可用于预测矩形泄漏孔喷射火孔口近区域的热辐射值;伤害半径与泄漏速度成指数关系,伤害半径的Thornton模型预测结果和模拟结果吻合得较好。
[Abstract]:In order to study the thermal radiation distribution of horizontal jet fire with rectangular leak hole, the fire dynamic simulation software (FDS) was used to simulate 13 kinds of fire with different leakage velocity under square and rectangular leak holes with the same area. The thermal radiation data and the damage radius of the spray fire are monitored, and then the thermal radiation value and the injury radius are calculated by using Thornton model, and the rectangular leakage hole aspect ratio factor is added to the model, and the Thornton model is modified according to the simulation results. The results show that the predicted value of the Thornton model is consistent with the simulated value, but the predicted value of the Thornton model is larger, and the modified Thornton model can be used to predict the thermal radiation value near the nozzle of the rectangular leak hole. The damage radius is exponentially related to the leakage velocity, and the prediction results of the damage radius by Thornton model are in good agreement with the simulation results.
【作者单位】： 山东工商学院管理科学与工程学院;北京工业大学建筑工程学院;首都经济贸易大学安全与环境工程学院;
【基金】：国家自然科学基金资助(51474151) 山东省自然科学基金资助(ZR2014GQ015)
【分类号】：TE88
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本文编号：1879952