In this work, the pressure wave propagation in the vertical and horizontal directions has been studied using a self-designed clapboard-type internally circulating fluidized bed. The effects of flow regimes and solid mixture on the pressure wave propagation characteristics were analyzed in terms of time-averaged pressure, standard deviation, power spectral density, dominant frequency, propagation time delay, and attenuation. The superficial velocity ratio had a remarkable effect on the pressure wave propagation time delay in the vertical direction but had less influence on the pressure wave propagation in the horizontal direction. The particle circulation provided an extra resistance force to the horizontal pressure wave propagation and resulted in an increase in the pressure wave decay factor in the horizontal direction. The addition of glass beads and salt greatly increased the time delay and decay factor both in vertical and horizontal directions. The addition of 15% corn powder (Geldart-C group) reduced the propagation time delay but increased the decay factor.

在这项工作中，已经使用自行设计的隔板式内部循环流化床研究了压力波在垂直和水平方向上的传播。从时间平均压力，标准偏差，功率谱密度，主频，传播时间延迟和衰减方面分析了流动方式和固体混合物对压力波传播特性的影响。表观速度比对垂直方向压力波传播时间延迟有显着影响，而对水平方向压力波传播时间影响较小。粒子循环为水平压力波的传播提供了额外的阻力，并导致水平方向的压力波衰减因子增加。玻璃珠和盐的添加大大增加了垂直和水平方向的时间延迟和衰减因子。添加15％的玉米粉（Geldart-C组）减少了传播时间延迟，但增加了衰减因子。