提升管循环流化床气,固局部滑落速度的分布

来源 :高校化学工程学报 | 被引量 : 0次 | 上传用户:xtt1027
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本研究采用光纤激光多普勒测速仪(LDV),通过两列信号处理系统,同时测定了气体和颗粒局部速度,研究了低密度循环流化床提升管内局部滑落速度的变化规律。实验结果表明,提高颗粒循环速率,在任一径向位置的气固滑落速度均增加;提高气体表观速度,反而使气固之间局部滑落速度减小。由于固体颗粒在近壁区的团聚行为,在近壁区气、固局部滑落速度出现一个极大值。
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