摘要
X光成像和CT在医疗、工业等领域获得了广泛的应用. 本文在轴对称假设的条件下,将X光成像系统用于测量气固流化床固含分布. 使用新型X光探测器和改进后的回归算法对投射图像进行重构还原,得到流化床中径向颗粒浓度分布.
Presuming axial symmetry for the solid concentration, the portable X-ray photography technique was improved and applied to measure the radial solid concentration in a riser of a circulating fluidized bed. The principle and image processing are briefly introduced. Twenty to thirty images with 100~200 ns X-ray pulses were processed to get a time-averaged concentration profile. The main steps of this technique include getting photos, deducting the background, calibrating mass thickness map, and regressing calculation. As a demonstration, the radial profile of solid concentration in a f192 mm riser was determined and compared with correlations in the literature.
出处
《过程工程学报》
CAS
CSCD
北大核心
2002年第5期400-405,共6页
The Chinese Journal of Process Engineering
基金
国家杰出青年基金资助项目(编号:29725613)
教育部留学回国人员基金资助项目
