To shed light on the effect of pulse flow on shear force and membrane fouling, the pulse frequency and flow velocity based on fiber Bragg grating (FBG) sensing technology were studied. The results show that there is a threshold for this synergy between the pulse frequency and flow velocity, which forms more easily at a high pulse frequency and low flow velocity. Moreover, the transition from pulse flow to continuous flow affects the shear force distribution with the membrane module height. Besides, at the same volumetric flow, Re gradually reaches a plateau as the pulse frequency increases from 1 to 5 Hz, and the membrane fouling control has a better flux recovery, which can reach a maximum of 28.89%. Finally, the results also show that the combined effect of high pulse frequency and low flow velocity would be higher than that of low pulse frequency and high flow velocity.

中文翻译：

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中空纤维膜组件中脉冲流引起的水力性能和结垢控制评估

为了阐明脉冲流对剪切力和膜污染的影响，研究了基于光纤布拉格光栅（FBG）传感技术的脉冲频率和流速。结果表明，脉冲频率和流速之间的这种协同作用存在一个阈值，在高脉冲频率和低流速下更容易形成这种协同作用。此外，从脉冲流到连续流的转变会影响剪切力随膜组件高度的分布。此外，在相同体积流量下，Re随着脉冲频率从1Hz增加到5Hz逐渐达到平台期，膜污染控制具有更好的通量恢复率，最高可达28.89%。最后，