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首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >CFD analysis and experimental study on the effect of oxygen level, particle size, and dust concentration on the flame evolution characteristics and explosion severity of cornstarch dust cloud deflagration in a spherical chamber
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CFD analysis and experimental study on the effect of oxygen level, particle size, and dust concentration on the flame evolution characteristics and explosion severity of cornstarch dust cloud deflagration in a spherical chamber

机译：CFD分析及实验研究氧气水平，粒度和粉尘浓度对球形室中玉米淀粉粉尘覆盖爆炸特性及爆炸严重程度的影响

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To clarify the effect and mechanism of oxygen supply, particle size, and dust concentration on the flame propagation behaviours and explosion characteristics of cornstarch dust cloud, a 3D numerical simulation for simulating the explosion process of cornstarch dust cloud were conducted and verified with experimental data using a 20-L sphere. Next, flame behaviours and explosion parameters under different conditions were investigated using numerical calculation and experimental observation. Results revealed that: flame propagation during the whole explosion process can be divided into four various stages according to the CFD simulation. Temperature fluctuation, dust agglomeration, and three different zones can be distinguished from the flame configuration. Oxygen supply, particle size, and dust concentration pose different impact trends to the initial flame behaviours and explosion parameters. The flame length varied linearly over time while oscillation phenomenon can be found in flame velocity at both the horizontal and vertical directions. (C) 2020 Elsevier B.V. All rights reserved.
机译：为了阐明氧气供应，粒度和灰尘浓度对玉米粉尘云的火焰传播行为和爆炸特性的影响和机制，用实验数据进行了模拟玉米粉尘云的爆炸过程的3D数值模拟一个20-l球体。接下来，使用数值计算和实验观察研究了不同条件下的火焰行为和爆炸参数。结果表明：根据CFD仿真，整个爆炸过程中的火焰传播可分为四个各个阶段。温度波动，灰尘聚集和三种不同的区域可以与火焰配置区分开。氧气供应，粒度和灰尘浓度对初始火焰行为和爆炸参数构成不同的影响趋势。随着时间的推移，火焰长度随着时间的推移而变化，而振荡现象可以在水平和垂直方向上的火焰速度中找到。 （c）2020 Elsevier B.V.保留所有权利。

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