Abstract Energy released in explosion of aluminum dust at a given concentration in air depends on pre-ignition turbulence. The combined effects of turbulence and concentration on aluminum dust/air explosion in a 20 L spherical vessel were examined by numerical calculation in this study. It is found that role of pre-ignition turbulence in the aluminum dust/air explosion is related to the nominal concentrations. At lower nominal concentrations, the turbulence is a dominant factor affecting an aluminum dust/air explosion over uniformity of aluminum dust suspended in air. However, at higher nominal concentrations, the uniformity of aluminum dust suspended in air is a dominant factor affecting an aluminum dust/air explosion over turbulence.

中文翻译：

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湍流对空气中不同浓度铝粉爆炸的影响

摘要 空气中给定浓度的铝粉爆炸所释放的能量取决于预燃湍流。本研究通过数值计算研究了湍流和浓度对 20 L 球形容器中铝粉尘/空气爆炸的综合影响。发现预燃湍流在铝粉尘/空气爆炸中的作用与标称浓度有关。在较低的标称浓度下，湍流是影响铝粉/空气爆炸超过悬浮在空气中的铝粉均匀性的主要因素。然而，在较高的标称浓度下，悬浮在空气中的铝粉的均匀性是影响铝粉/空气在湍流中爆炸的主要因素。