This paper investigates the effect of two-phase mixing of gas and liquid in a top-blowing mixing tank on the uniformity of temperature distribution, using hot heat transfer oil and air as the working medium. Results show that temperature difference is the main factor influencing the temperature field uniformity in the mixing tank, and the uniformity of the temperature distribution increases with the temperature difference increased, while the increase of the air flow and the insertion depth of the gun has less influence on the uniformity of the temperature distribution. In addition, a new threshold selection method is proposed for grayscale maps with temperature fields corresponding to different color gradations, in which the overall mean is replaced by the mean of the grayscale values in the target region, and a highly correlated model between the temperature field and the grayscale map is determined with a correlation coefficient of 0.98. Using a thermal imaging camera and digital image processing techniques, combining with a deviation approach, a relative ratio η between the uniformity of the two-dimensional temperature field distribution and the uniformity of the pixel distribution of its corresponding grayscale map is established. In particular, the indicator shows an interesting trend with an increasing temperature difference, i.e., the ratio is close to 1. The effect of bubble-flow topology on the uniformity of temperature distribution was explored, and it was found that betti numbers averages were negatively correlated with temperature distribution uniformity factor. Finally, a correlation model (correlation coefficient of 0.95) between the uniformity of the temperature field distribution and the average volumetric thermal coefficient was obtained experimentally.

本文研究了顶吹混合罐中气液两相混合对温度分布均匀性的影响，以热导热油和空气为工质。结果表明，温差是影响混合槽内温度场均匀性的主要因素，温度分布的均匀性随温差的增加而增加，而气流和枪插入深度的增加影响较小。温度分布的均匀性。此外，针对不同色阶对应的温度场灰度图，提出了一种新的阈值选择方法，将整体均值替换为目标区域灰度值的均值，确定温度场与灰度图之间的高度相关模型，相关系数为0.98。利用热像仪和数字图像处理技术，结合偏差法，建立二维温度场分布均匀度与其对应灰度图像素分布均匀度的相对比值η。特别是，随着温差的增加，该指标显示出一个有趣的趋势，即该比率接近 1。 探讨了气泡流拓扑对温度分布均匀性的影响，发现 betti 数平均值为负与温度分布均匀性因子相关。最后是一个相关模型（相关系数为0。