CAJ | 학술논문

采用递归分析方法对流化床内的压力脉动信号进行分析，研究了不同工况下石英砂与柱形生物质颗粒混合双组分颗粒的流动特性。柱形生物质颗粒尺寸为10 mm×10 mm（直径×长），石英砂粒径为0.8 mm。在鼓泡床阶段，随着生物质含量的增加，系统的周期性呈现先减弱再增强的变化趋势；该阶段确定性与层流率均表现为随气速的增加而增大，其值在生物质含量低时会明显减小，系统熵则随着气速的增大而减小。在腾涌阶段，生物质添加前后系统信号的递归图呈现相似的纹理特征，确定性与层流率变化较小，此时熵随着气速的增加而减小，与单组分流动呈现相反的趋势。
채용체귀분석방법대류화상내적압력맥동신호진행분석，연구료불동공황하석영사여주형생물질과립혼합쌍조분과립적류동특성。주형생물질과립척촌위10 mm×10 mm（직경×장），석영사립경위0.8 mm。재고포상계단，수착생물질함량적증가，계통적주기성정현선감약재증강적변화추세；해계단학정성여층류솔균표현위수기속적증가이증대，기치재생물질함량저시회명현감소，계통적칙수착기속적증대이감소。재등용계단，생물질첨가전후계통신호적체귀도정현상사적문리특정，학정성여층류솔변화교소，차시적수착기속적증가이감소，여단조분류동정현상반적추세。
Recurrence plot and recurrence quantification analysis were used to analyze the pressure fluctuation signal, and particle flow characteristics at different numbers of biomass, quartz sands and different gas velocities were investigated. The quartz sands with the diameter of 0.8 mm and cylinder-shaped biomass particles with both diameter and length of 10 mm were used as bed materials. In the bubbling section, the periodicity of the system decreased first and then increased with increasing proportion of biomass. In the slugging section, recurrence plots of signal had the same textural feature in the fluidized-bed before and after biomass was added. The bubbling section determinism and laminarity flow rate increased with increasing gas velocity, and significantly decreased at a low proportion of biomass, but entropy of the system decreased with increasing gas velocity. The slugging section determinism and laminarity flow rate had a small change and entropy of the system decreased with increasing gas velocity, showing opposite tendency from the one-component system.