摘要
对巡航导弹尾焰的流场分布进行了分析,建立了简化工程模型。该模型可在已知尾喷管压力、温度的条件下计算尾焰的温度场和压力场分布,与计算流体力学在相应条件下模拟的尾焰流场特性基本一致。进而以C-G谱带法计算简化模型的辐射亮度分布。计算结果表明,巡航导弹尾焰核心区的辐射亮度特征明显;尾焰辐射3～5μm波段可作为探测尾焰的主要波段;辐射亮度在与尾焰垂直方向最强。本文的结果可为探测巡航导弹及空间相机的谱带选择提供依据。
A simplified engineering model is built by analyzing the flow field of cruise missile. It can calculate the distribution of temperature and pressure if the temperature and pressure of tail pipe are known. The model is basically consistent with the simulation which is used by hydromechanics. The luminance is calculated by the C-G approximate model of spectral bands. The results indicate that the character of luminance on core area of plume is apparent and the luminance on vertical direction is brighter than other orientations. 3-5um spectrum band can be main spectrum band for detection for plume of cruise missile. The analysis and results provide the basis for the detection of cruise missile and selection to spectral band for spatial camera.
出处
《光电工程》
CAS
CSCD
北大核心
2009年第4期70-74,共5页
Opto-Electronic Engineering
关键词
巡航导弹
尾焰
建模
红外辐射
cruse missile
exhaust plume
model building
infrared radiation
