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A Computation Method for Separate Flow Velocity Based on ERT in Dredging Engineering

2024 IEEE INTERNATIONAL INSTRUMENTATION AND MEASUREMENT TECHNOLOGY CONFERENCE, I2MTC 2024(2024)

Tianjin Univ

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Abstract
For the solid-liquid two-phase flow in dredging engineering, the flow velocity of solid-phase objects is a crucial parameter to evaluate the dredging yields. However, the current computation method for flow velocity based on electrical resistance tomography (ERT) cannot effectively provide the parameter because only averaging velocity is available in practice. To address this issue, a dispersed-phase fraction-based method is proposed to separately calculate the flow velocity of not only solid-phase but also liquid-phase objects. This method first separates the solid and liquid phases from the reconstructed image using the calculated solid-phase fraction. Then, after comparing two ERT image series from adjacent upstream and downstream, the cross-correlation principle is used to calculate the flow velocity for the separated solid-phase and liquid-phase objects, respectively. Finally, Experiments based on the actual measurements in dredging engineering validate the rationality and effectiveness of the proposed method.
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solid-liquid two-phase flow,flow velocity,solid-phase fraction,electrical resistance tomography
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要点】:本文提出了一种基于电电阻层析成像(ERT)的固体-液体两相流中分离相流速的计算方法,能够分别计算固体相和液体相的流速,提高了疏浚工程产量评估的准确性。

方法】:该方法通过首先利用ERT重建的图像计算得到的固体相分数来分离固体和液体相,然后通过比较上下游相邻的ERT图像系列,应用交叉相关原理分别计算分离后的固体相和液体相的流速。

实验】:实验基于疏浚工程的实际测量数据,验证了所提方法的合理性和有效性,使用的数据集未在文中明确提及。