PRESSURE
PRESSURE
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DOI：
10.32388/wgg52s
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发表时间：
2020-02
期刊：
影响因子：
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通讯作者：
H. Horst;Daniel V. Miller
中科院分区：
文献类型：
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作者：
H. Horst;Daniel V. Miller
本文研究了固液两相流入口区的压力脉动特性。为了研究压力脉动沿轴向的发展过程，在试验管内每隔2m设置6个压力传感器。实验发现，在较高流速范围内，最大压力波动随距进料器距离的增加而减小。也就是说，最大压力波动随着流动的发展而减小。另一方面，在较低的速度范围内，从进料器的距离上的最大压力波动的影响很小。此外，还证实了在入口区域自相关函数不具有周期性，但随着流动的发展，在远离进料口的测量点处，在低流速和高浓度范围内，自相关函数具有明显的周期性。这种周期性导致了管道中沙丘的移动。研究发现，在入口区域，最大压力脉动随颗粒直径的增大而增大，但随着与进料器距离的增大，最大压力脉动的增大速率减小。当流动充分发展时，最大压力脉动不受颗粒直径的影响。沙丘，倾斜度，平坦度，固液
This paper presents the characteristics of the pressure fluctuation in the entrance region in solid-liquid flow. To investigate an axial developing process of the pressure fluctuation, six pressure transducers were set at intervals of 2m in the test pipe. It was found from the experiment that in the range of higher velocities, the maximum pressure fluctuation decreased as the distance from the feeder increased. That is, the maximum pressure fluctuation decreased as the flow developed. On the other hand, in the range of lower velocities, little effect of distance from the feeder on the maximum pressure fluctuation was obtained. Furthermore, it was confirmed that the periodicity in the auto-correlation function was not obtained in the entrance region, but as the flow developed, the obvious periodicity in the auto-correlation function was obtained in the range of lower velocities and higher solid concentration at the measuring point far from the feeder. This periodicity results in the movement of dune formed in the pipe. And it was found that in the entrance region, the maximum pressure fluctuation increased as the particle diameter increased, but the rate of increase of the maximum pressure fluctuation decreased as the distance from the feeder increased. When the flow developed fully, the maximum pressure fluctuation was not effected by the particle diameter. Dunes, Skewness, Flatness, Solid-Liquid