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

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.

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 investiga- ted,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 in- creased 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 ex- it temperature, Mach number and altitude and decreased with the ratio＇ s increase.