The objective of this study was to relate experimental pressure fluctuation behavior to the transition in mode of flow observed in fluidized dense phase pneumatic conveying of fly ash. Shannon entropy and wavelet analysis were utilized to extract features of the flow regimes. Daubechies db4 wavelet analysis of pulsating air pressure revealed that the flow mechanism of fly ash in a fluidized dense phase possessed non-steady characteristics associated with gradual aeration of dunes along the direction of flow. Variations of Shannon entropy values along the length of the pipeline were assessed to determine the location at which the flow converted from dense to dilute phase mode. The effects of conveying parameters and specific power consumption on Shannon entropy and variations of the local power consumption coefficient are discussed.

这项研究的目的是将实验压力波动行为与粉煤灰流化致密相气动输送中观察到的流动模式转变相关联。香农熵和小波分析被用来提取流态的特征。Daubechies db4脉动气压的小波分析表明，飞灰在流化致密相中的流动机制具有非稳定特性，与沙丘沿流动方向的逐渐曝气有关。评估了香农熵值沿管道长度的变化，以确定流量从密相模式转换为稀相模式的位置。讨论了输送参数和比功率消耗对香农熵的影响以及局部功率消耗系数的变化。