测定了不同物料最大操作区所对应的静床高及喷动流化气速与床层压降、床层空隙率分布的关系。
The corresponding static bed height of the biggest spout fluid operating range and the relation between bed pressure drop and spout fluid velocity were determined.
计算结果表明，银催化剂床层空隙率的减小或操作空速的增加有利于减弱该催化反应过程中外扩散效应的影响。
The obtained results showed that the effect of external diffusion could be slackened by the decrease of fixed-bed voidage and the increase of space velocity.
近年来填充床反应器CFD数学模型韵几个研究重点是动量交换系数、毛细管压力以及床层空隙率的非均匀分布性。
Several of the focuses of CFD model in packed-bed reactors were studied, namely, the momentum exchange coefficient, the capillary pressure and the void fraction.
由于床层中没有大气泡生成，与普通流化床（CFB）相比，VFB具有更低的初始流化速度和更大的床层空隙率，而且流化稳定。
A comparison of VFB and CFB indicates that VFB has lower minimum fluidization velocity, higher bed voidage and more steady fluidization because big bubbles can not be formed in the bed.
不同滤层厚度、滤速和加药比ALT等条件下的过滤试验结果表明：滤层中单元滤床的特征尺寸的变化仅与空隙率有关。
The experiment reveals that the variation of UFE numbers is only dependent on the volume-specific deposit of filter, the effects of filtration velocity, bed depth and ALT ratio are not evident.
不同滤层厚度、滤速和加药比ALT等条件下的过滤试验结果表明：滤层中单元滤床的特征尺寸的变化仅与空隙率有关。
The experiment reveals that the variation of UFE numbers is only dependent on the volume-specific deposit of filter, the effects of filtration velocity, bed depth and ALT ratio are not evident.
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