Vigorous particle collisions and mechanical processes occurring during high-velocity pneumatic conveying often lead to particle degradation. The resulting particle size reduction and particle number increase will impact on the flow characteristics, and subsequently affect the electrostatic type of flow measurements. This study investigates this phenomenon using both experimental and numerical methods. Particle degradation was induced experimentally by recursively conveying the fillite material within a pneumatic pipeline. The associated particle size reduction was monitored. Three electrostatic sensors were embedded along the pipeline to monitor the flow. The results indicated a decreasing trend in the electrostatic sensor outputs with decreasing particle size, which suggested the attenuation of the flow velocity fluctuation. This trend was more apparent at higher conveying velocities, which suggested that more severe particle degradation occurred under these conditions. Coupled computational fluid dynamics and discrete element methods (CFD–DEM) analysis was used to qualitatively validate these experimental results. The numerical results suggested that smaller particles exhibited lower flow velocity fluctuations, which was consistent with the observed experimental results. These findings provide important information for the accurate application of electrostatic measurement devices in pneumatic conveyors.

高速气动输送过程中发生的剧烈颗粒碰撞和机械过程通常会导致颗粒降解。所得的粒度减小和颗粒数量增加将影响流量特性，并随后影响流量测量的静电类型。这项研究使用实验和数值方法研究了这种现象。通过在气动管道中递归地输送填充材料，通过实验诱发了颗粒降解。监测相关的粒度减小。沿管道嵌入了三个静电传感器以监控流量。结果表明，随着颗粒尺寸的减小，静电传感器的输出呈下降趋势，这表明流速波动的减弱。这种趋势在较高的输送速度下更明显，这表明在这些条件下发生了更严重的颗粒降解。耦合的计算流体动力学和离散元方法（CFD–DEM）分析用于定性验证这些实验结果。数值结果表明，较小的颗粒表现出较低的流速波动，这与观察到的实验结果一致。这些发现为静电测量设备在气动输送机中的准确应用提供了重要信息。耦合的计算流体动力学和离散元方法（CFD–DEM）分析用于定性验证这些实验结果。数值结果表明，较小的颗粒表现出较低的流速波动，这与观察到的实验结果一致。这些发现为静电测量设备在气动输送机中的准确应用提供了重要信息。耦合的计算流体动力学和离散元方法（CFD–DEM）分析用于定性验证这些实验结果。数值结果表明，较小的颗粒表现出较低的流速波动，这与观察到的实验结果一致。这些发现为静电测量设备在气动输送机中的准确应用提供了重要信息。