潜艇热尾流红外特征分析与计算

The Analysis and Calculation of Infrared Signature of Thermal Wake of Submarines

在建立海水的红外辐射模型的基础之上，综合考虑了海面发射率、天空辐射、阴影遮挡系数、环境大气等因素对探测器接收到的辐射能量的影响，模拟计算出8～141μm波段内探测器接收到的潜艇热尾流浮升到海面之后的辐射亮度。并根据热尾流与周围海水的平均温度差计算出红外探测器对潜艇热尾流的作用距离。分析得出热尾流的红外辐射特性分别与探测方位、风速、尾流温度、环境温度与湿度等因素密切相关，并且当采用温度分辨率达到0．001℃的红外热像仪，尾流温度与周围海水的温差达到0．02℃时，探测器对尾流目标的发现距离、识别距离、认清距离分别为8．84km，3．88km，2．74km。

Based on the model of infrared radiation of seawater, the factors which included emissivity of sea surface, radiation of sky, shadow coefficient, atmosphere were considered, and the directional radiant power of thermal wake of the submarine at 8 - 14μm was also calculated. According to the difference in temperature between thermal wake and seawater, the operation range of the detector to thermal wake was calculated. And it was gotten that the radioactive characterization related to direction of detector, wind speed, temperature of wake, temperature of atmosphere and so on. Used the infrared thermal image system whose temperature resolving is 0.001 ℃, the detection range, discrim- ination range, recognition range of the detector to thermal wake were 8.84km, 3.88km, 2.74km with the difference in temperature between thermal wake and seawater was 0.02℃.