本文使用光纤测量了导流管喷动床环隙区的速度分布,通过计算颗粒流中的Savage数,Bagnold数和Friction 数等准则数,表明该区流动为重力控制,以摩擦应力为主的慢速颗粒流.颗粒速度沿径向近似线性变化,而且其切变率随高度有很大不同.最后研究了表现气速,导流管内径,夹带区高度等对颗粒速度分布的影响.
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