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Preliminary study on three-dimensional imaging of cryogenic two-phase flow based on electrical capacitance volume tomography
Cryogenics ( IF 2.1 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.cryogenics.2020.103127
Tao Xia , Huangjun Xie , Aibo Wei , Rui Zhou , Limin Qiu , Xiaobin Zhang

Abstract The potential application of electrical capacitance volume tomography (ECVT) to the liquid nitrogen-vaporous nitrogen two-phase flow measurement is evaluated by numerical experiment. The Landweber iteration is taken as the inversion algorithm which derives the reconstructed images. Eight types of ECVT sensor structures are tested and the accuracy of the reconstructed images is compared to evaluate the quality of the sensor structures. Especially, the effect of the axial guard electrodes is analyzed and discussed. The anti-noise ability of the optimal structure is also determined by calculating seven different phase distribution cases. The results demonstrate that the shifted plane and the axial guard electrode in ECVT sensor are helpful for image reconstruction quality. The layer number of ECVT sensor influences the reconstructed images a lot while the shape of the electrode has little effect on it. ECVT also shows a certain anti-noise ability under the noise level of 60 dB and 55 dB.

中文翻译:

基于电容体积断层扫描的低温两相流三维成像初步研究

摘要 通过数值实验评估了电容体积断层扫描(ECVT)在液氮-气氮两相流测量中的潜在应用。Landweber 迭代被用作推导重建图像的反演算法。测试了八种类型的 ECVT 传感器结构,并比较了重建图像的准确性,以评估传感器结构的质量。特别是对轴向保护电极的影响进行了分析和讨论。优化结构的抗噪能力也是通过计算七种不同的相位分布情况来确定的。结果表明,ECVT 传感器中的移位平面和轴向保护电极有助于图像重建质量。ECVT传感器的层数对重建图像的影响很大,而电极的形状对其影响很小。ECVT在60分贝和55分贝的噪音水平下也表现出一定的抗噪能力。
更新日期:2020-09-01
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