水下缩比航行体热尾流的红外探测实验

根据缩比模型，建立缩比红外成像实验测试系统，对水下航行体的体积、航行深度、运动速度、尾流排放等进行缩比设计，设计多种实验工况，可实现缩比目标模型红外尾流的静态和动态测试。一方面明确红外尾流的可探测性，另一方面掌握红外尾流可探测性的影响因素以及红外尾流的变化规律，为下一步工作奠定基础。缩比实验结果表明，利用区域灰度均值和均方差的起伏变化可有效探测水下航行体水面尾迹。
According to similarity principles, an infrared imaging experimental test system based on scale model was set up, such work conditions as scale model based vehicle volume, submerged depth, movement, wake discharging, and etc, were designed so that the static and dynamic thermal wake detection tests of scaled vehicle were realized. The detectability of submerged vehicle thermal wakes on one side was determined, and the influencing factors at thermal wakes detection and changing rules of the wakes were found, which lays a foundation for future work. Scale model experimental tests show that the thermal wakes from submerged vehicle can be effectively detected out via the substantial changes of regional gray mean and gray mean variation.