排气百叶窗对红外信号传输影响的机理分析  

The Mechanism Research of Louver Influence on Infrared Signal Transmission

作　　者：王振 安一峰 黄冰阳[1] WANG Zhen;AN Yi-feng;HUANG Bing-yang(China Ship Development and Design Center, Wuhan 430064, China)

机构地区：[1]中国舰船研究设计中心,武汉430064

出　　处：《船海工程》2020年第6期44-47,共4页Ship & Ocean Engineering

基　　金：国家某部委预研项目(41408010404)。

摘　　要：针对典型船舶排气百叶窗红外信号泄漏的问题,基于COMSOL Multiphysics平台建立红外辐射模拟的几何光学模型,分析排气百叶窗自发辐射和漫反射-出射过程,对改变百叶窗结构方案进行仿真,结果表明,百叶窗间隙处的红外线“漫反射-出射”会导致烟囱内部高温部件与烟气的红外信号外泄;通过改变百叶窗结构对光路进行控制,可以减小红外信号的可探测性,大倾斜角度的格栅结构设计可以有效将烟囱内部高温组件及烟气的红外信号传输方向向下偏折,从而大幅度降低该红外信号特征向远方传播的能力,减小被红外探测器接收的概率。A geometrical optic model of infrared radiation(IR)simulation was established in COMSOL's Multiphysics platform for representative ship chimney louvers to analyze infrared radiation and reflection of typical louvers,as well as the applicability of the improved louver structure scheme.It was shown that the diffused reflection and emergence of IR caused by inner high-temperature components and gas through the louver gap is the main reason for forming IR shinning region at the chimney louver area.The louver infrared shining can be controlled to reduce the detectability of infrared signal by means of changing the structure of louver;larger inclination angel of louver blade can deflect the IR caused by inner high-temperature components and gas to the sea surface,so as to reduce the possibility of being detected by infrared detector.

关 键 词：排气百叶窗 漫反射-出射 几何光学 红外 

分 类 号：U664.81[交通运输工程—船舶及航道工程]