THE VOID FRACTION DISTRIBUTION IN TWO-DIMENSIONAL GAS-LIQUID TWO PHASE FLOW USING IMAGE PROCESS METHOD
THE VOID FRACTION DISTRIBUTION IN TWO-DIMENSIONAL GAS-LIQUID TWO PHASE FLOW USING IMAGE PROCESS METHOD
复制标题
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Zhao;Ke-yu;Cheng;Wen;Liao;Wei-li;Zhou;Xiao-de
中科院分区：
文献类型：
--
作者：
Zhao;Ke-yu;Cheng;Wen;Liao;Wei-li;Zhou;Xiao-de
提出了一种测量高气泡数密度下瞬时二维局部含气率的图像处理方法。它是基于计算气泡羽流图像的局部平均亮度和真实的空隙率之间的相关性。该方法被用来测试从可视化图像的局部空隙率的2D分布，其中的局部平均亮度和投影空隙率之间的相关性推导出通过引入一个理想的重叠概率的气泡图像在各种条件下。这项研究被用来研究的行为的泡状流的纵横比为1.0，1.5，和2.0。将该方法应用于瞬态测量。为了研究气泡对泡状流特性的影响，测量了三种不同长径比、三种不同气泡产生流量下的泡状羽流的含气率。的空隙率上的气体流速Dependency进行了测量，并从文献中的其他结果进行了比较。在我们的实验范围内，据观察，不仅坦克的长宽比影响羽流的结构，但也在坦克的气体流量影响羽流的结构。
An image processing method for measuring the instantaneous two-dimensional (2D) local void fraction at high bubble number density was proposed. It was based on computing a correlation between the locally averaged brightness of the bubble plume images and the real void fraction. The method was tested using the 2D distribution of local void fraction from visualized image, where a correlation between the locally averaged brightness and the projection void fraction was derived by introducing an ideal of overlapping probability of the bubble-images under various conditions. This research was used to study the behavior of the bubbly flows with aspect ratio of 1.0 1.5, and 2.0. The present method was applied to the instantaneous measurement. The void fraction for bubble plumes of three different aspect ratios with three different bubble generating flow rates were measured for the clarification of the effect of the bubble on the behavior of the bubbly flows. Dependency of the void fraction on the gas flow rate was measured and compared to other results from the literature. In the range of our experiments, it was observed that not only does an aspect ratio of the tank affect the structure of the plume, but also the gas flow rate in the tank affects the structure of the plume.