海洋背景下8～12μm Kelvin尾迹红外探测  

Infrared detection of 8-12 μm Kelvin wake under ocean background

作　　者：张士成[1] 杨桢[1] 杨立[1] 

机构地区：[1]海军工程大学船舶与动力学院动力工程系,湖北武汉430033

出　　处：《红外与激光工程》2011年第10期1851-1855,共5页Infrared and Laser Engineering

基　　金：国防预研项目(101050202)

摘　　要：舰船在海面航行时会在船后留下一条明显可辨的尾流且能够持续很长时间,长度可达数千米。采用JONSWAP谱模型实现了海面的模拟,结合Kelvin尾迹模型,完成了海洋背景下Kelvin波的尾迹显示。在此基础上,综合考虑海面及周围环境辐射的影响,建立尾迹探测的红外辐射模型,计算并分析了Kelvin尾迹的红外辐射特征。研究结果表明:探测俯仰角较小时,Kelvin尾迹特征明显易于探测,俯仰角较大时,Kelvin尾迹特征减弱;海面风速是影响探测效果的重要因素,风速增加,海面对Kelvin尾迹的调制作用增强,最终会导致无法探测;尾迹探测不受白天和夜晚的影响。The apparent feathers of ship wake provided the bases for detecting ship through the infrared characterization of wake. JONSWAP spectrum was introduced to simulate the sea surface. Combined with Kelvin wake model, the simulation of Kelvin wake under ocean background was achieved. On the basis of aforementioned work, the effect of radiation of sea surface and surrounding environments was comprehensively considered, and the infrared radiation model of wake was established. Then the infrared radiation characterization was calculated and analyzed. Research results show that the Kelvin wake characterization is easily detected under small elevation angle while the wake characterization weakens under big elevation angle. The sea surface wind velocity is an important factor of influencing detection. The modulation effect of sea surface to Kelvin wake will enhance with increasing of wind velocities, which will lead to impossible detection at last. The ship wake detection is less influenced by the daytime and night.

关 键 词：Kelvin尾迹 JONSWAP谱 海面模拟 红外特征 红外探测 

分 类 号：TK124[动力工程及工程热物理—工程热物理]