中文摘要：

火焰在一个小规模的垂直矩形房间通过锆粒子云宣传试验性地被调查。在实验，锆引用了 99% 纯净被使用，粒子的直径是分布式的 122 m。锆灰尘坐飞机被驱散进房间流动并且由一朵电极火花点火了。一台高速度的摄像机被用来记录宣传火焰的图象。微热电偶， schlieren 光系统和显微镜的透镜被用来分别地获得温度侧面和火焰结构。基于试验性的结果，火焰繁殖特征和锆粒子云的火焰结构被分析。火焰的繁殖速度是相当慢的在起始 14 ms 然后加速到最大的价值。随后，火焰的繁殖速度几乎保持不变。锆粒子云的燃烧地区宽度是 56 公里。更小的粒子在在燃烧地区的前缘后面烧 1.46 公里的更大的粒子跟随的 1.4 公里的宽度主要在燃烧地区的前缘烧。煤气的阶段火焰没在锆粒子云和粒子是 15 ms 的单个锆的燃烧时间被看见，它取决于它的原来的尺寸。预热地区是在燃烧地区前的 78 公里厚度，集中的化学反应发生在 490 K。最大的火焰温度在更低的集中增加，到达最大的价值，然后在更高的集中稍微减少。

英文摘要：

Flame propagating through zirconium particle cloud in a small-scale vertical rectangle chamber was investigated experimentally. In the experiments, the zirconium quoted 99% purity was used and the diameter of particles was distributed 1-22 μm. The zirconium dust was dispersed into the chamber by air flow and ignited by an electrode spark. A high-speed video camera was used to record the images of the propagating flame. Micro-thermocouples, schlieren optical system and microscopic lens were used to obtain temperature profiles and flame structure, respectively. Based on the experimental results, flame propagation characteristics and flame structure of zirconium particle cloud were analyzed. The propagation velocity of the flame is quite slow in the initial 14 ms and then accelerates to maximum value. Subsequently, the propagation velocity of the flame almost keeps constant. The com- bustion zone width of zirconium particle cloud is 5-6 mm. Smaller particles burn mainly at the leading edge of combustion zone in the width of 1.4 mm followed by larger particles burning 1.4-6 mm behind the leading edge of the combustion zone. Gas phase flame is not seen in zirconium particle cloud and the combustion time of single zirconium particle is 1-5 ms, which depends on its original size. The preheated zone is 7-8 mm thickness ahead of the combustion zone and intensive chemical reaction takes place at 490 K. The maximum flame temperature increases at lower concentrations, reaches the maximum value, and then decreases slightly at higher concentrations.