火箭尾喷焰辐射远程探测信号随飞行参数的变化规律
The change law of remote sensing signal of rocket exhaust plume radiation with the variation of aviatic parameters
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摘要: 建立了火箭尾喷焰辐射远程探测宽带k分布计算模型,对不同飞行状态下尾喷焰远程探测信号的变化情况进行了考察,并对尾喷焰辐射信号的相对数值进行了分析比较.结果表明:在8.0~11.5μm和10.0~13.4μm谱带内,远程探测积分辐射强度随喷口燃气温度、马赫数和非计算度的增大而增大,随海拔高度的上升而减小;自身和探测积分辐射强度的比值都随喷口燃气温度、马赫数、海拔高度的增大而增大,随非计算度的增大而减小.Abstract: A wide band k-distribution model was established to calculate the remote sensing signal of rocket exhaust plume,the change law of remote sensing signal with variation of aviatic parameters was investigated,and the ratios of rocket exhaust plume's radiation signal were analyzed and compared.The results showed that between the 8.0~11.5 μm and 10.0~13.4 μm,the sensing integral radiation intensities increased with the increase of the nozzle exit temperature,Mach number and ratio of pressure and decreased with the altitude's increase.The own and sensing integral radiation intensities increased with the nozzle exit temperature,Mach number and altitude and decreased with the ratio's increase.
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