基于光电池阵列的小通道气液两相流气泡参数检测方法

Bubble parameter measurement of gas-liquid two-phase flow in small channel based on photodiode array

提出一种基于光电池阵列的小通道气液两相流气泡尺寸(气泡截面直径及其截面中心点位置)检测新方法。该方法先利用光电池阵列传感器获得反映小通道内气液两相流气泡截面信息的光强分布信号,然后利用主成分分析对信号降维,最后利用支持向量机(SVM)方法分别建立气泡截面直径和气泡截面中心点位置的测量模型,并进而实现气泡截面直径及其截面中心点位置2个参数的测量。在内径为4.04 mm的水平玻璃管内进行的初步实验研究结果表明本文所提出的基于光电池阵列的小通道气液两相流气泡尺寸检测方法是可行的、有效的。气泡截面中心点位置测量的最大相对误差小于8%,气泡中部截面直径测量的最大相对误差小于10%。

Based on photodiode array, a new method for bubble parameter（cross-sectional diameter and center of the bubble） measurement of gas-liquid two-phase flow in small channel was proposed. Firstly, the voltage signals, which reflect the cross-sectional information of bubbles in gas-liquid two-phase flow in small channel, were obtained by photodiode array sensors. Then, principal component analysis（PCA） was used to reduce the dimensionality of data sets. Finally, support vector machine（SVM） method was applied to develop the measurement models of bubble size. The measurements of the cross-sectional diameter and center of bubbles were implemented. The bubble parameter measurement experiments were carried out in a horizontal channel with inner diameter of 4.04 mm. The results show that the presented method is feasible and effective. The maximum relative error of the cross-sectional center of bubble is less than 8% and the maximum relative error of the cross-sectional diameter of the middle part of bubble is less than 10%.