流化床内初始气泡频率实验研究

本文在多孔分布板流化床中测量了孔内气体流量的随机波动，在频谱图上发现有两个峰值，其主频本ｆ＿ｃ和次主频率ｆ＿ｓ分别表示了在流化床底层区内合并气泡和单气泡的生成频率，文中还得到了初始气泡频率与孔内平均流速、孔径、孔间距的关联式．

Study into the Characteristic of Initial Bubble Frequency in a Fluidized Bed

The random fluctuation characteristic curve of gas flow rate is measured in a perforated distributor,It is found that two crests emerge on frequency spectral diagram, The dominant frequencyfc and secondary dominant frequency fs reprersent the generation frequencies of single bubble andmerged bubbles in bettom region respectively, The correlations between frequencies and average flowrate , hole diameter and hole interval are presented.