To study volatile combustion processes of single coal particles non-intrusive simultaneous multi-parameter measurements were performed. The experiment was carried out in a fully premixed flat flame burner with well-defined boundary conditions. For flame visualization high-speed luminescence imaging was combined with high-resolution high-speed OH-PLIF. To address particle size and shape a stereoscopic high-resolution backlight-illumination system was set up. Due to simultaneous recording of individual particle events the volatile combustion duration related to particle size, shape and velocity was measured. A comparison of luminescence imaging and OH-PLIF for flame visualization was investigated to define their application areas in coal combustion. The stereoscopic backlight-illumination setup was benchmarked to a well characterized bituminous coal. With a pixel resolution of ∼2.5 µm fine particle contours were resolved. The particle diameter and eccentricity were evaluated by an ellipse approximation. The experimental setup can be used to investigate different coal ranks and biomass in N₂/O₂ and CO₂/O₂ atmospheres in future.

为了研究单煤颗粒的挥发性燃烧过程，进行了非侵入式同时多参数测量。该实验是在边界条件明确的完全预混合平面火焰燃烧器中进行的。为了进行火焰可视化，将高速发光成像与高分辨率高速OH-PLIF相结合。为了解决颗粒大小和形状问题，建立了立体高分辨率背光照明系统。由于同时记录了单个颗粒事件，因此测量了与颗粒大小，形状和速度有关的挥发性燃烧持续时间。对发光成像和OH-PLIF进行火焰可视化的比较进行了研究，以定义它们在燃煤中的应用领域。立体背光照明设置以特征明确的烟煤为基准。像素分辨率约为2.5 µm，可分辨出细颗粒轮廓。通过椭圆近似法评价粒径和偏心率。实验装置可用于调查氮中不同的煤阶和生物量₂ / O ₂和CO ₂ / O ₂未来的大气压。