论文部分内容阅读
以染色法为基本原理,实验采集试件表面不同位置的染色过程视频.通过对视频数据的分析获取试件表面色度随时间增长的时序信号.实验过程可以划分为欠饱和区、平衡区和过饱和区.平衡区的比色值分布即为局部水收集系数分布的归一化结果.通过比色积分曲线的极限行为确定水滴撞击极限和总收集系数与最大局部水收集系数的比值.将实验结果与数值仿真结果和NASA(美国国家航空航天局)实验结果对比表明:水滴撞击特性参数与动态视频图像的RGB(rad-green-blue)色度空间可以建立较好的关联,实验重复性误差率小于±15%;水滴撞击特性参数之间存在内在关联.
Taking the dyeing method as the basic principle, the video of the dyeing process at different positions on the surface of the specimen was collected experimentally, and the chronological signal of the surface chromaticity increased with time was obtained by analyzing the video data.The experimental process can be divided into the under-saturation area, the balance area and Supersaturated zone.The colorimetric distribution of the equilibrium zone is the normalized result of the local water collection coefficient distribution.The ratio of the droplet impact limit and the total collection coefficient to the maximum local water collection coefficient is determined by the limit behavior of the colorimetric integral curve. The experimental results, numerical simulation results and NASA (NASA) experimental results show that there is a good correlation between the droplet impingement parameters and the RGB (rad-green-blue) chromaticity space of dynamic video images. The experimental repeatability The error rate is less than ± 15%; there is an inherent correlation between drop impact characteristics parameters.