摘要
搭建了基于高速数字全息的燃烧颗粒测试系统。通过对全息图进行处理,观察了竹粉颗粒形貌变化和颗粒破碎等现象;验证了对颗粒三维轨迹追踪的可行性;比较了燃烧前后颗粒粒径分布和速度分布。重建结果展示了各种不同形貌竹粉颗粒的清晰图像。统计结果表明,燃烧后的小颗粒(粒径小于30μm)数量增多,大颗粒(粒径大于50μm)数量减少;径向速度分布范围变大;轴向速度整体增大,并出现双峰分布,与观察结果吻合较好。
In this study, a high-speed digital holographic system is established for measuring the amount of burning particles. After processing the hologram, the evolution of the morphology and the fragmentation of bamboo powder are observed. Further, the ability of the system to track the three-dimensional trajectories of particles is validated. The size and speed distributions of the particles before and after combustion are compared, and the reconstruction results display high-quality images of bamboo powders having various morphologies. The statistical results denote that the number of small particles (diameter<30 μm) increases, whereas that of the big particles (diameter>50 μm) decreases after combustion. Subsequently, the distribution range of the radial speed of the particles is extended, and the axial speed denotes an overall increase with a bimodal distribution. The statistical results are observed to agree very well with the direct observations.
作者
姚龙超
吴学成
林小丹
吴迎春
陈玲红
高翔
岑可法
Yao Longchao;Wu Xuecheng;Lin Xiaodan;Wu Yingchun;Chen Linghong;Gao Xiang;Cen Kefa(State Key Laboratory of Clean Energy Utilization , Zhejiang University, Hangzhou, Zhejiang 310027, China)
出处
《激光与光电子学进展》
CSCD
北大核心
2019年第10期60-66,共7页
Laser & Optoelectronics Progress
基金
国家自然科学基金(91741129)
国家自然科学基金重大项目(51390491)
国家自然科学基金创新研究群体项目(51621005)
关键词
全息
生物质颗粒
数字同轴全息
形貌与粒径
颗粒破碎
运动速度
holography
biomass particle
digital in -line holography: morphology and size
particle fragme ntation
motion velocity
